報答歌詞3篇

時間：2022-06-28 寫作知識點擊：

報答歌詞3篇

報答歌詞(1)

第5期有效學案參考答案

第5課時等腰三角形(1)

【檢測1】等邊對等角；頂角平分線、底邊上的中線、底邊上的高.

【檢測2】提示：用“SAS”證明△ADB≌△ADC.

【問題1】證明：∵AB＝AC，AO＝AO，OB＝OC．

∴△AOB≌△AOC(SSS)．

∴∠OAB＝∠OAC．

∵AB＝AC，∴AO⊥BC .

【問題2】設∠ACD＝α，則∠EDC＝α，∠A＝∠AED＝2α，

∠ACB＝∠B＝∠BDC＝∠A＋∠ACD＝3α．

在△ABC中，由內角和定理得2α＋3α＋3α＝180°，

∴α＝°．∴∠A＝2α＝45°.

1．D. 2．D .

3．40°，40°；30°，120°或75°，75°.

4. 25. 5．105°.

6.（1）70°；（2）40°.

7．∠A=∠E．

理由：∵CB=CE，∴∠E=∠CBE．

又∵AD∥BC，∴∠A=∠CBE，∴∠A=∠E．

8．∵DB=DC，∴∠DBC=∠C=40°，

∴∠ADB=∠DBC+∠C=80°．

∵AB=DB，∴∠A=∠ADB=80°．

∴∠ABD=180°-∠A-∠ADB=20°．

9．解：此題分三種情況．

(1)當底邊上的高與一腰的夾角是40°時，如圖①，頂角是80°，從而兩個底角是50°，50°；

(2)當一腰上的高與另一腰的夾角是40°且高在三角形內部時，如圖②，頂角是50°，從而兩個底角是65°，65°；(3)當一腰上的高與另一腰的夾角是40°且高在三角形外部時，如圖③，頂角是130°，從而兩個底角是25°，25°．綜上所述，三個角的度數為80°，50°，50°或50°，65°，65°或130°，25°，25°.

10．（1）∵DA= DC，∴∠A=∠ACD=30°，∴∠CDB=60°．

∵DB=DC，∴∠B=∠DCB=60°，∴∠ACB=90°；

（2）∠ACB=90°；

（3）不論∠A等于多少度（小于90°），∠ACB總等于90°.

11．B.

12．證明：連接DE，DF．∵AB＝AC，∴∠B＝∠C．

又∵BD＝CF，BE＝CD，∴△BDE≌△CFD(SAS)．

∴DE＝DF．∵EG＝GF，∴DG⊥EF．

第6課時等腰三角形(2)

【檢測1】D.

【檢測2】證明：過點A作AD⊥BC，垂足為D．

∵∠B＝∠C，∠ADB＝∠ADC，AD＝AD，

∴△ADB≌△ADC(AAS)．∴AB＝AC；

(2)如果一個三角形有兩個角相等，那么這兩個角所對的邊也相等或“等角對等邊”.

【問題1】已知：如圖，∠DAC是△ABC的外角，且∠DAC＝2∠B．

求證：△ABC是等腰三角形．

證明：∵∠DAC＝2∠B，又∵∠DAC＝∠B＋∠C，

∴∠B＝∠C．∴△ABC是等腰三角形

【問題2】∵BD⊥EF，

∴∠F＋∠FCD＝90°，∠B＋∠E＝90°.

∵AB＝AC，∴∠B＝∠ACB.

∵∠FCD＝∠ACB,∴∠B＝∠FCD.

∴∠E＝∠F.∴AE＝AF.∴△AEF是等腰三角形.

1．是. 2．C. 3．D. 4．2cm.

5．∵PD∥OB，∴∠DPO=∠BOC．

∵OC平分∠AOB，

∴∠BOC=∠AOC.∴∠DPO=∠AOC．

∴DP=DO，即△DOP是等腰三角形 .

6．∵AD平分∠BAC，∴∠BAD=∠CAD．

又∵AD∥EG，∴∠G=∠CAD，∠AFG=∠BAD.

∴∠G=∠AFG，∴△AGF是等腰三角形．

7．連接CD．∵AD＝BC，AC＝BD，DC＝CD．

∴△ADC≌△BCD．∴∠ACD＝∠BDC．∴OD＝OC.

8．6.

9．證明：在DC上截取DE＝DB，連接AE．則AB＝AE，

∴∠B＝∠AEB．∵∠B＝2∠C，∴∠AEB＝2∠C．

∵∠AEB＝∠C＋∠EAC，∴∠C＝∠EAC．

∴AE＝EC．∴DC＝DE＋EC＝BD＋AB.

10．D.

11．(1)證明：∵AB＝BA，AC＝BD，∠C＝∠D＝90°，∴Rt△ABC≌Rt△BAD(HL)．∴∠EAB＝∠EBA．∴AE＝BE.

(2)∵∠AEC＝45°，∠C＝90°，

∴∠CAE＝45°．∴∠CAE＝∠CEA．∴CE＝AC＝1.

第7課時等腰三角形(3)

【檢測1】相等，60；等邊三角形，60，60.

【檢測2】一，三，作圖略.

【問題1】∵△ABC是等邊三角形，∴∠A=60°．

又∵AD=AE，∴△ADE是等腰三角形．

∴△ADE是等邊三角形．

【問題2】DE=DB，理由：∵CD=CE，∴∠E=∠EDC．

又∵∠ACB=60°，∴∠E=30°．

又∵∠DBC=30°，∴∠E=∠DBC，∴DB=DE．

1．都. 2．150m. 3．4．4．C. 5．D.

6．∵△ABC是等邊三角形，∴∠BAC=60°．

∵AD⊥BC，∴∠DAC=30°．∵AE=AD，

∴∠ADE=93b05c90d14a117ba52da1d743a43ab1.png×(180°－30°)=75°．

∴∠CDE=∠ADC－∠ADE=15° .

7．∵AP＝PQ＝AQ，∴△APQ是等邊三角形．

∴∠PAQ＝∠APQ＝∠AQP＝60°．

∵AP＝BP，∴∠BAP＝∠B＝93b05c90d14a117ba52da1d743a43ab1.png∠APQ＝30°．

同理，∠CAQ＝30°．

∴∠BAC＝∠BAP＋∠PAQ＋∠CAQ＝30°＋60°＋30°＝120°.

8．證明：如圖，延長AE到M，使EM＝AB，連接DM．

∵△ABC為等邊三角形，

∴∠A＝60°，且AB＝AC．∴EM＝AC．

∵CD＝AE，∴CD＋AC＝AE＋EM．即AD＝AM．

∴△ADM是等邊三角形．

word/media/image5.gif∴DA＝DM，且∠M＝60°．

在△DAB和△DME中，

66a312363ce6b0a2c456cc6da553f9ed.png

∴△DAB≌△DME(SAS)．

∴DB＝DE.

9．(1)∵△ACD和△BCE都是等邊三角形，

∴CA＝CD，CE＝CB，∠ACD＝∠BCE＝60°．

于是∠DCE＝60°．∠ACE＝∠DCB＝120°．

∴△ACE≌△DCB(SAS). ∴AE＝DB.

(2)由第(1)問的結論得∠CAE＝∠CDB．

∵CA＝CD，∠ACG＝∠DCH＝60°．

∴△ACG≌△DCH(ASA)．

∴CG＝CH．而∠DCE＝60°．

∴△CGH是等邊三角形.

10．B.

11．證明：(1)∵AB⊥BC，DC⊥BC，

∴∠ABC＝∠BCD＝90°．

∵△PBC和△QCD是等邊三角形，

∴∠PBC＝∠PCB＝∠QCD＝60°.

∴∠PBA＝∠ABC－∠PBC＝30°，

∠PCD＝ ∠BCD－∠PCB＝30°．

∴∠PCQ＝∠QCD－∠PCD＝30°．

∴∠PBA＝∠PCQ＝30°．

(2)∵AB＝DC＝QC，∠PBA＝∠PCQ，PB＝PC，∴△PAB≌△PQC，∴PA＝PQ．

第8課時等腰三角形(4)

【檢測1】一半.

【檢測2】4cm.

【問題1】連接AD．∵AB＝AC，點D為BC的中點，

∴AD⊥BC，∠BAD＝60°．從而∠ADE＝30°.

∴AD＝2AE.由∠B＝30°得AB＝2AD.

∴AB＝4AE，BE＝3AE．

∴AE∶EB＝1∶3.

【問題2】有觸礁的危險．

過點P作PC⊥AB，垂足為點C．

∵∠BPA＝∠PBC－∠A＝15°，

∴∠BPA＝∠A，∴AB＝PB＝15×2＝30．

在Rt△PBC中，PC＝93b05c90d14a117ba52da1d743a43ab1.pngPB＝15海里＜18海里.

故不改變方向，繼續向前航行有觸礁的危險.

1.2cm. 2．18cm，120°.

3．4． 4．2cm． 5．1．

6．∵△ABC是等邊三角形，∴∠ACB＝60°．

∵AD∥BC，∴∠DAC＝∠ACB＝60°．

∵CD⊥AD，∴∠ACD＝90°－∠DAC＝30°．

∴AD＝e0c6e196198cc9874fbd3a5fc2aeee7c.pngcm.

7．連接AE，在Rt△ABC中，

∠B＝90°－∠BAC＝90°－60°＝30°.

∵DE是AB的垂直平分線，∴AE＝BE.

∴∠EAD＝∠B＝30°.∴∠CAE＝30°.

∴AE＝2CE＝3×2＝6cm.∴BE=6cm.

8．能求出PD的長.

過點P作PE⊥OB.

∵∠AOP＝∠BOP，PD⊥OA，∴PD＝PE．

∵PC∥OA，∴∠CPO＝∠POA＝15°．

∴∠ECP＝∠BOP＋∠CPO＝15°＋15°＝30°．

∴PE＝9ed173eb70ac318db53fd4fe1a25884e.png．∴PD＝2．

9．(1)當∠BQP＝90°時，BQ＝93b05c90d14a117ba52da1d743a43ab1.pngBP．

即t＝93b05c90d14a117ba52da1d743a43ab1.png(3－t)，t＝1(s)；

(2)當∠BPQ＝90°時，BP＝93b05c90d14a117ba52da1d743a43ab1.pngBQ．即3－t＝93b05c90d14a117ba52da1d743a43ab1.pngt，t＝2(s)．

故當t＝1 s或t＝2 s時，△PBQ是直角三角形.

10．225a. 提示：過點B作BD⊥AC，垂足為D．則∠BAD＝30°，BD＝93b05c90d14a117ba52da1d743a43ab1.pngAB＝15m.

11．(1)如圖2；

(2)∵l垂直平分AB，

∴∠EDB＝90°，EA＝EB．∴∠EBA＝∠A＝30°．

∵∠ACB＝90°，∴∠ABC＝60°．

∴∠EBC＝∠EBD＝30°．∴DE＝CE＝93b05c90d14a117ba52da1d743a43ab1.pngBE．

又∵∠F＝90°－∠ABC＝30°，∴EF＝2CE．∴EF＝2DE．

word/media/image13.gif

12．3測試題

基礎鞏固

1．D. 2．D. 3．B．4．C．5．A．6．B．

7．480．8．等腰. 9．1．10．85°．

11．∵AB＝AC， BD平分∠ABC，∴∠C＝∠ABC＝2∠DBC．

在△DBC中，∠C＋∠DBC＋∠BDC＝180°，

∴2∠DBC＋∠DBC＋84°＝180°．

∴∠DBC＝32°．∴∠ABD＝32°．

∴∠A＝∠BDC－∠ABD＝84°－32°＝52°．

12．證明：∵BA=BC，∴∠A=∠C．

又∵DF⊥AC，∴∠A +∠D =90°，∠C+∠CEF =90°．

∴∠D =∠CEF．

又∵∠CEF=∠BED，∴∠D =∠BED，∴BD=BE．

13.∵CD平分∠ACB，∠ACB=120°，

∴∠1=∠2=fd15b087bc7f2e2c9a47838a9df31a54.png=60°．

∵AE∥DC，∴∠4=∠2=60°，∠E=∠1=60°，

∴∠3=∠4=∠E=60°，∴△ACE是等邊三角形．

14．證明：連接FA，

∵AB＝AC，∠A＝120°，∴∠B＝∠C＝30°．

∵EF垂直平分AC，∴FA＝FC.

于是∠FAC＝∠C＝30°，∠BAF＝90°．

在Rt△BAF中得，∵BF＝2FA．∴BF＝2CF．

15．過點D作DG∥AE交BC于點G．則∠DGB＝∠ACB．

∵AB＝AC，∴∠B＝∠ACB．

∴∠B＝∠DGB．∴DB＝DG．

∵BD＝CE，∴DG＝CE．

∵∠FDG＝∠FEC，∠DFG＝∠EFC，

∴△FDG≌△FEC．∴DF＝EF．

能力提高

1．D．

2．C．提示：兩條對角線的交點P0滿足條件．以AB為邊向正方形內作等邊三角形P1AB，則P1也滿足條件．同理可作出P2、P3、P4．因此，在正方形內共可找到5個滿足條件的點P(注：在正方形外還可以找到4個滿足條件的點P) ．

3．40°．提示：∠APQ＋∠AQP＝2(∠B＋∠C)＝2(180°－110°)＝140°．

4．①②③④．提示：連接AC，由SAS知△PCA≌△PCB，于是可知PC平分等腰三角形CAB的頂角，所以PC⊥AB．

5．解：過點A作AG⊥DE于點G，則

AG∥BC，∠FGA＝∠FEB，∠AFG＝∠BFE．

∵FA＝FB．∴△FAG≌△FBE．

∴FG＝FE＝3，AG＝BE＝4．

易知△CDE是等腰直角三角形，從而可知△AGD是等腰直角三角形，

∴DG＝AG＝4．∴DF＝DG＋FG＝4＋3＝7．

6．答：AB與AF，CF之間的等量關系是：AB＝AF＋CF．

證明：分別延長AE，DF相交于點M．則△EAB≌△EMC．

∴AB＝CM，∠BAE＝∠FMA．

∵∠BAE＝∠FAM，

∴∠FAM＝∠FMA．

∴AF＝FM．

∴AB＝CM＝CF＋FM＝CF＋AF．

第6期有效學案參考答案

第9課時第十二章復習課

【檢測1】相等；相等；重合；兩；兩.

【檢測2】相等；相等；60°；三；三；60°.

【檢測3】（1）是軸對稱圖形，有3條對稱軸；（2）是軸對稱圖形，有5條對稱軸；（3）不是軸對稱圖形；（4）是軸對稱圖形，有1條對稱軸；（5）是軸對稱圖形，有2條對稱軸；（6）不是軸對稱圖形；（7）是軸對稱圖形，有1條對稱軸；（8）是軸對稱圖形，有4條對稱軸．

【問題1】(1)∵∠BAC＝30°，∠BCD＝60°，

∴∠ABC＝∠BCD－∠BAC＝30°．

∴∠ABC＝∠BAC．∴AC＝BC＝20，20÷10＝2(小時).

故該船到達C處時的時間是13時30分.

(2)∵∠CBD＝30°，∠BDC＝90°，

∴CD＝93b05c90d14a117ba52da1d743a43ab1.pngBC＝10(海里)，10÷10＝1(小時).

故14時30分到達海島B的正南D點處.

【問題2】連接OP．

(1)由對稱性可知MP＝MP1，NP＝NP2，

∴P1P2＝△PMN的周長＝5(cm)．

(2)△OP1P2是等邊三角形，理由是：

由對稱性可知∠MOP＝∠MOP1，∠NOP＝∠NOP2，

∴∠P1OP2＝2∠AOB＝60°．而OP1＝OP，OP2＝OP，∴OP1＝OP2，∴△OP1P2是等邊三角形

1．D. 2．3，－4. 3．B. 4．C. 5. 60°.

6．如圖1，點A關于MN的對稱點A′與點A重合．過點B作BO⊥MN于點O，延長BO到B′，使OB′＝BO；同理作出點C關于MN的對稱點C′．連接A′B′，B′C′，C′A′，則△A′B′C′即為所求.

7．證明：連接AE，CE，

∵NE垂直平分BD，∴BE＝DE．

∵ME垂直平分AC，∴AE＝CE．

∵AB＝CD，∴△EAB≌△ECD(SSS)．∴∠ABE＝∠CDE .

8．（1）20，45，60；（2）∠A=2∠DBC；

（3）作AE⊥BC，垂足為點E.

∵AB=AC，∴∠CAE=93b05c90d14a117ba52da1d743a43ab1.png∠BAC，∠CAE+∠C=90°.

又∵BD⊥AC，∴∠DBC+∠C=90°.

∴∠DBC=∠CAE=93b05c90d14a117ba52da1d743a43ab1.png∠BAC.

9．如圖2.

word/media/image18.gif

10.（-1，3）.

11．△AFC是等腰三角形．

證明：∵ BD＝BE，∠BAD＝∠BCE，∠B＝∠B，

∴△BAD≌△BCE．∴∠BAC＝∠BCA．

∵∠BAD＝∠BCE，∴∠DAC＝∠ECA．

∴FA＝FC．∴△AFC是等腰三角形．

第十二章綜合測試題(一)

一、精挑細選，一錘定音

1．Ａ. 2．B．3．C．4.Ａ. 5．D．6．D．7．D.

8．D．

9．B．提示：需經過6次反射．

10．Ｂ.提示：AＯ既可以作底邊，也可以作腰.

二、慎思妙解，畫龍點睛

11．2.

12．21∶05．

13．20.

14．答案不唯一，如BD＝CE或∠BAD＝∠CAE等．

°．16.5. 17.5cm.

18．70°或20°．提示：有銳角三角形和鈍角三角形兩種情況．

三、過關斬將，勝利在望

19．如圖1.

20．如圖2.

21．（1）圖略；（2）A′（2，2），B′（3，1），C′（-1，-2）．

22．延長AD，BC相交于點E，則△CDE是等邊三角形．

在Rt△ABE中，∵∠A＝30°，∴AE＝2BE．

設CD＝x，則4＋x＝2(1＋x)．解得x＝2．

故CD的長為2．

23.同意. 理由：∵點E在BO的垂直平分線上，∴1043faab53d33ba04d30dcd35acbabbb.png.

∵ △ABC是等邊三角形,∴∠ABC=60°.

∵OB平分∠ABC，

∴∠OBE=∠ABO=30°.∴∠OBE=∠EOB=30°.∴∠OEF=60°.

同理∠OFE=60°.∴△OEF是等邊三角形．

24.（1）①與③；①與④；②與③；②與④.

（2）答案不唯一，如選①與③.

已知：∠EBO=∠DCO，BE=CD；求證：△ABC是等腰三角形。

證明：∵∠EBO=∠DCO，BE=CD，∠EOB=∠DOC，

∴△BOE≌△COD.∴OB=OC.∴∠OBC=∠OCB.

∴∠EBO+∠OBC=∠DCO +∠OCB.

∴∠EBC=∠DCB.∴AB=AC，∴△ABC是等腰三角形.

四、附加題

25．(1)證明：連接MB，

∵∠B＝90°，BA＝BC，∴∠A＝∠C＝45°．

∵MA＝MC，∴BM⊥AC，∠MBA＝∠MBC＝45°．

∴∠A＝∠MBA＝∠MBC＝∠C．∴MA＝MB＝MC．

∵AD＝BE，∴△MAD≌△MBE(SAS)．

∴MD＝ME，∠AMD＝∠BME．

∵∠AMD＋∠DMB＝90°，

∴∠BME＋∠DMB＝90°．∴△MDE是等腰直角三角形.

(2)如圖3，結論仍然成立．

word/media/image22.gif

26．（1）證明：∵CD⊥AB，∠ABC＝45°，

∴△BCD是等腰直角三角形.

∴BD＝CD.

第十二章綜合測試題(二)

一、精挑細選，一錘定音

1．A．2．C．3．A．4．B．5．B．6．C．7．C．

8．B．提示：∠PBC＋∠PCB＝∠PCA＋∠PCB＝∠ACB＝65°．

9．B．提示：△ABC是等邊三角形．10．C．

二、慎思妙解，畫龍點睛

11．30°或75°．12．5 ．13．40°.14．①②③④. 15．30．16．6．

17．40．18．5．

三、過關斬將，勝利在望

19．答案不唯一，略.

20．如圖2 .

21．燈塔B與漁船M的距離是14海里．提示：證MB=AB.

22．∵∠A＝∠B，∴AC＝BC＝5．

∴EC＝AC－AE＝5－3＝2．

∵DE∥BC，∴∠ADE＝∠B．

∴∠A＝∠ADE．∴DE＝AE＝3．

∵DE∥BC，∴∠EFC＝∠FCB．

∵∠FCB＝∠FCE．∴∠EFC＝∠FCE．∴FE＝EC＝2．

∴DF＝DE－FE＝3－2＝1．

23．(1)畫圖略，點A，B，C，D關于x=－2對稱的點分別是A′(－4，1)，B′(－1，4)，C′(1，4)，D′(1，1)；(2)AB與A′B′交于點E(－2，3)，且S△A′AE=4.

24．(1)DE＋DF=CG．連接AD，則S△ABC=S△ABD＋S△ACD，即93b05c90d14a117ba52da1d743a43ab1.pngAB·CG=93b05c90d14a117ba52da1d743a43ab1.pngAB·DE＋93b05c90d14a117ba52da1d743a43ab1.pngAC·DF．

因為AB=AC，所以CG=DE＋DF；

(2)當點D在BC延長線上時，(1)中的結論不成立，此時有DE－DF=CG．理由如下：

連接AD，則S△ABD=S△ABC＋S△ACD，即有93b05c90d14a117ba52da1d743a43ab1.pngAB·DE=93b05c90d14a117ba52da1d743a43ab1.pngAB·CG＋93b05c90d14a117ba52da1d743a43ab1.pngAC·DF．

因為AB=AC，所以DE=CG＋DF，即DE－DF=CG．

同理，當點D在BC的延長線上時，(1)中結論變為DF－DE=CG．

四、附加題

25．（1）∵△ABC為等邊三角形，∴∠BAE＝∠C＝60°．

在△BAE和△ACD中，

7206c77ccdd5ed701b21e39458045af9.png

∴△BAE≌△ACD．

∴AD＝BE．

（2）由（1）得∠ABE＝∠DAC．

∴∠BPD＝∠ABE＋∠BAP＝∠DAC＋∠BAP＝∠BAC＝60°．

∴∠PBQ＝30°．

在Ｒt△BPQ中，BP＝2PQ＝6.

∴BE＝BP＋PE＝6＋1＝7.

∴AD＝BE＝7.

26．（1）AD＝BE；

（2）AM＋CM＝BM．

證明：在BM上截取BN＝AM，連接CN．

易證△BCN≌△ACM，得到CN＝CM，∠BCN＝∠ACM．

∴∠NCM＝∠NCA＋∠ACM＝∠NCA＋∠BCN＝∠BCA＝60°．

∴△CMN為等邊三角形．

∴MN＝CM．

∴AM＋CM＝BM．

（3）AM＋CM＝BM．

第7期有效學案參考答案

第1課時 13．1平方根（1）

【檢測1】546bbf38d67c1d46f52a4a94c34a8543.png，算術平方根，c17e049691f2eb2d93102b7d4b309572.png．

【檢測2】B．

【問題1】（1）7；（2）；（3）5；（4）a55337e42fcc5ede2854cfdc65b4e4cc.png．

【問題2】不能.理由：設圓形紙片的半徑為r，則31bf0b12546409e15021243132fc7574.pngr2=4031bf0b12546409e15021243132fc7574.png, r=0541c8d79fd77f70fafb001cb8f592ef.png,因為40>36，所以0541c8d79fd77f70fafb001cb8f592ef.png>f3ef1ecde8d7e3da4fe7d8c3c5c5ed8f.png,即0541c8d79fd77f70fafb001cb8f592ef.png>6,所以圓形紙片的直徑為2r=20541c8d79fd77f70fafb001cb8f592ef.png>12cm>10cm,所以不能裁剪出滿足條件的圓.

. 2. A. 3．D． 4.0c4209a8faecbcee233e5df1e1751e24.png.

5．a＝3，b＝4.提示：b99f5944f7e0f047f695ce149a3664b5.png＜216554093aa007ab9947ed316b9c44a1.png＜041488095c432876812e182dbbc08f48.png，即3＜216554093aa007ab9947ed316b9c44a1.png＜4，所以a＝3，b＝4.

6. (1)11; (2) b0e1326365729673e417839e572d1ced.png; (3)；(4) .

7. （1）；（2）.

8. ∵aa4e3cfb024c7ff30a8846913966dfb1.png>2, ∴6e1182c5acd9abe3407ff5c1bb4c54e8.png>2d54f92bdb529e93c7f803301ab99f90.png>1>0d22222bb8de12f364c2851ca96ea265.png,∴6e1182c5acd9abe3407ff5c1bb4c54e8.png>0d22222bb8de12f364c2851ca96ea265.png.

9．x＝1，y＝－3，z＝2．

10.（1）依次為,,; 規律：被開方數的小數點每向右(左)移動兩位,算術平方根的小數點相應地向右(左)移動一位.

（2）38ec3c451941344ce6ea4eb7c95d9ea7.png≈；6c269f45479d3797f80d497e20738b87.png≈.

11. 設長方形的長為3x m，寬為x m.則3x·x=9.解得x=91a24814efa2661939c57367281c819c.png.因此這塊長方形區域的長為84507545f131b7108866546c72caaa20.png m.因為91a24814efa2661939c57367281c819c.png>，所以84507545f131b7108866546c72caaa20.png>.又因為小明房間的地面邊長為4，所以小明不能實現他的計劃.

12．3．13．B．

14．先求出這兩個圖形的面積和196cm2,于是滿足條件的正方形面積為196cm2，此時它的邊長為81dec6ff676f849f6433993689a56219.png．

第2課時 13．1平方根（2）

【檢測1】(1)平方根，二次方根，52cce7fda64bbd2a7164de54d9814061.png；(2)兩，互為相反數，0，沒有平方根．

【檢測2】C．

【檢測3】±9．

【問題1】（1）±11；（2）±；（3）±6；（4）0c295fdbc821327e708feec8b4a71e73.png．

【問題2】設大正方形的邊長為xm，小正方形的邊長為ym，根據已知得x2=30，y2=2，

所以x=±f10ac6fceee41bb786d24ee337f02bab.png，y=±d21848cdd835abcb491be1f151e9b6c6.png，

因為正方形的邊長不能為負，所以x=-f10ac6fceee41bb786d24ee337f02bab.png，y=-d21848cdd835abcb491be1f151e9b6c6.png要舍去．

所以a=557fa9dfa1595d451cdac9ebdfb41dc1.png≈×≈(m)．

1.（1）±15；（2）14. 2. D. 3. A. 4．D．

5. （1）1平方根是±1，算術平方根是1；（2）平方根是±，算術平方根是；（3）256平方根是±16，算術平方根是16；（4）d63c3ebef4deed03ca4cd568b8b4e9f9.png平方根是±0375c8978fffc23854f4a4391e070bfd.png，算術平方根是0375c8978fffc23854f4a4391e070bfd.png.

6．（1）（2）dc9505c7e13e00185dcfcdc9e311fbfc.png.

7.（1）x=±f3ef1ecde8d7e3da4fe7d8c3c5c5ed8f.png=±6; （2）x2=49, x=±daefe075b6fa310deed2c27ae94d0851.png=±7;

（3）x2=2f30450a2ddd29e451756b033079b678.png, x=±3cdb2523dde9b0a94b1c9ae7b0266f37.png=±665ecd7719a119a777670a43e5d81dde.png.

8．0.3m．

9．∵一個正數的兩個平方根互為相反數，

∴(a+2)+(a-6)=0．解得a=2．

∴x=(a+2)2=16.

10．5.7cm．

11．±4

12．答案不唯一，如2025年5月5日等．

13．把h=180 m，g=10 m /s2代入公式 h=93b05c90d14a117ba52da1d743a43ab1.pnggt2，得180=93b05c90d14a117ba52da1d743a43ab1.png×10t2．

所以t2=36，所以t=±6．

因為時間不能為負，所以t=6．

即物體到達地面需要的時間為6 s．

第3課時 13．2 立方根

【檢測1】立方根，三次方根， 76b1e479f805bb036a3487aeb35932e5.png，a．

【檢測2】2，－8．

【問題1】（1）5；（2）；（3）－7964c6a339acf2ddea25a5ef0552b97e.png．

【問題2】解：（1）設每個小正方體的棱長是x㎝，由題意得

8cd81d846781f418f883642fab802ae4a.png=1000－488．

解得x=4．

答：小正方體的棱長是4㎝．

（2）由于重新鍛造的體積不變，所以新正方體的棱長是eb65734f0bd97082682cc422cf663f71.png㎝．

1．C． 2. D. 3．B．

4．C．5．（1）c9f0f895fb98ab9159f51fd0297e236d.png；（2）10cfc0dd6f03ce6a747d565f6e35fd9b.png；（3）e4da3b7fbbce2345d7772b0674a318d5.png．

6. （1）；（2）.

7．2 .2m．

8.（1）x3 =8, x=2; (2) x+3=10, x=7.

9.（1）aad729f22c80161662e596711815fdbe.png43e3d698daba92a260278412b88170b4.png.

10. （1）分別為,,，規律：被開方數的小數點每向右(左)移動三位,立方根的小數點也相應地向右(左)移動一位；（2）da3582ba4f28b2903b4d10438c976ebf.png≈.

11．A．12．C．

13．由題意得小正方體的邊長是50f406b2d173f16e013b8616c213d3c8.png=665ecd7719a119a777670a43e5d81dde.png㎝．

所以它的表面積是6×f1394e5e058aedbccc9fe0db56a0acf0.png．

第4課時 ~習題課

【檢測1】被開方數是非負數，被開方數是任何數．

【檢測2】（1）的算術平方根是，平方根是±；

（2）bedbd5aa6886b9cf5edd56bc59c45bbf.png的算術平方根是9df743fb4a026d67e85ab08111c4aedd.png，平方根是±9df743fb4a026d67e85ab08111c4aedd.png．

【檢測3】（1）－0．8；（2）－0d22222bb8de12f364c2851ca96ea265.png；（3）－2．

【問題1】（1）原式=；（2）原式=4÷(1-9)=.

【問題2】b16e17d08c12f5db4297310424d13eb8.png或a55337e42fcc5ede2854cfdc65b4e4cc.png．

1. A. 2．D．3．C． 4．B． 5．，68800．

6．（1）0；（2）1b5b2d97ef46fb94f5352e5646ded321.png．

7. （1）6

報答歌詞(2)

報答父母的句子

比天空更寬闊的是父母的愛。父母為了子女可以傾其所有，作為子女請不要吝嗇自己的行動和語言。在結婚、生日、工作和學習取得成績的時候，向父母表達一下自己的感恩之情。即使是一個擁抱、一句簡單的話語、抑或一份小小的禮物。

73、父母，我感激你們的養育之恩，我會知恩圖報。學好本領做一個對社會、對人類有貢獻的人。

74、我們要感謝父母一路走來的扶持，我們要感謝朋友一路陪伴我們走過風風雨雨，我們要感謝老師的諄諄教誨。正因為我們要感謝的人太多太多，所以我們應在心里默默的祝福他們所有人。不管是失去還是擁有？

75、羊有跪乳之情，鴉有反哺之義。而人也應有盡孝之念，莫等到欲盡孝而親不在，終留下人生的一大遺撼，要想將來不后悔莫及，從現在就要從身邊的小事去感恩父母，回報父母。回報也不一定非的是物質上的回報，更多的是精神上的、情感上的。就算是遠渡重洋、留學海外，我們時刻要懷揣著一顆感恩的心。正如世紀老人巴金所說：我是春蠶吃的桑葉就要吐絲。春蠶付出了，也獲得了，得到的卻是人們的贊美與欽佩。

76、生而至今，雖有小病小災，也一直是平平安安；雖有磕磕碰碰，也一直算順順利利。感謝神，讓我擁有正常人的一切。四肢雖不強壯然而健全，眼睛雖然近視然而明亮，工作雖不合性情然而穩定，生活雖不圓滿然而幸福。

77、爸爸媽媽謝謝你們，小時候覺得，你們是我的世界。長大之后才發現，原來你們一直都把我當作是你們的世界。小時候的呵護，長大之后的陪伴一直都是你們陪伴著我。

78、孝敬父母，懂得感恩，是中華民族的傳統美德。感恩為了我們忙碌操勞一生的父母，感恩為了我們辛勤勞動一生的父母，感恩為了我們精疲力竭一生的父母，感恩為了我們費盡心血一生的父母，孝敬父母是我們理所當然，義不容辭的責任和義務。

79、感謝你們給了我生命，讓我能夠在這個世界上生存！如果沒有你們，我所擁有的一切將會為零，正因為有了你們，我才會綻放生命的光彩！

80、記得兒子大約兩歲時，我在縣城工作。有一次周末我要回農村老家過生日，兒子問我干什么。我說：回家看我媽媽！他驚奇得問：你也有媽媽嗎？兒子天真的一問令我感慨萬千，淚往心里流：天下誰人沒有媽媽？

81、感謝父母給予的養育之恩，感謝父母無私的奉獻與關愛；感謝父母的教誨，使你們懂得什么是真愛什么是美好；感謝父母的理解與支持，使得今天一對新人有了美好幸福的婚禮；對父母的承諾與祝愿，用心的表達出對父母的愛。

82、母愛，猶如波瀾壯闊的大海，一望無垠的藍天，遼闊的草原，蔥郁的森林。翻滾著，蔓延著，生長著，蓬勃著，像歷史的長河奔騰喧涌，永不停息，轟轟烈烈。

83、我的脈博里流淌著您的血液，我的性格上深烙著您的印記，我的思想里繼承著您智慧，這一切的一切，我永遠不會忘記，我親愛的父親，感恩節快樂！

報答歌詞(3)

[標簽:標題]

篇一：學英語報紙12期答案

第二版

同步課堂

Unit 1

1 connect; to 2 C 3 B 4 to draw Unit2

1 B 2 D 3 Do; make travel plans4 send

詞語貼士

1 search for information

2 search; for 3 search his clothes 語法在線

1 How 2 Who 3 How many 4 Where 5 Which 6 When/What time 7 What 8 How old

第三版

Unit 1

Ⅰ 1 screen 2 print 3 paper 4 Finally 5 keyboard

Ⅱ 1 learn 2 uses 3 coonect 4 click 5 save

Ⅲ 1 boxes 2 first 3 its 4 to open5 mice

Ⅳ 1 turn on 2 on the left of 3 Put; in 4 What about 5 of course Unit2

Ⅰ 1 visit 2 often 3 customers4 pllan 5 games

篇二：七年級學英語報紙寒假版參考答案

寒假專版參考答案

第1版寒假作業（一）詞匯與句型篇

詞匯運用

Ⅰ. 1-5 cdeba

Ⅱ. 1. German 2. age 3. hobbies4. mountains 5. friendly

6. never7. Geography 8. break9. guitar10. together

Ⅲ. 1-5 ACACD

Ⅳ. 1. is from2. look like 3. lives with4. eating out

5. arrive at6. helping; with 7. am good at 8. on the Internet

9. go to bed 10. take the bus

句型演練

Ⅰ. 1. teeth 2. playing 3. friendly 4. elder5. German

6. to be7. to go 8. running9. playing 10. listening Ⅱ. 1. enjoy/like2. seldom3. elder; dreams

4. by bus5. favourite sport

第2版寒假作業（二）語法專練

Ⅰ. 1-5 DBACA 6-10 DACBD

Ⅱ. 1. Does Kate want 2. Which man 3. doesn’t play 4. How often

5. Yes; he does6. When is 7. Does Peter take 8. parents’ ages

9. How many flats10. No; they don’t

Ⅲ. 1. Germany 2. hobbies3. playing4. friends 5. twice

6. goes7. to be 8. Does; doesn’t9. times 10. likes

Ⅳ. 1. an ice cream 2. seldom goes out 3. wants to be

4. twice a week 5. helps me buy

Ⅴ. 1. D a改為an 2. A long改為often 3. A not之前加do

4. A Which改為What5. B wash改為washes

第3版寒假作業（三）讀寫綜合篇

補全對話

A篇 1-5 FDEAC

B篇 1-5 GEFBD

完形填空

1-5 ABDDB 6-10 CACCB

閱讀理解

1-5 BCDCD

書面表達

One possible version:

Pleasant Goat and Force Goat are good friends. They both help Slow Goat a lot. But they

aren’t the same. Pleasant Goat runs faster than other goats. He is happy and outgoing. He always has smiles on his face. Force Goat is stronger but more careless than others. He exercises every day to keep healthy, but he gets angry easily. He always disagrees with others.

第4版寒假作業（四）詞匯與句型篇

詞匯運用

Ⅰ. 1. protect2. large 3. burn 4. pollute 5. wet

Ⅱ. 1. spend 2. blows 3. snowy 4. grandparents5. burn

6. few 7. trip 8. problems 9. into 10. large

Ⅲ. 1-5 BBAAC

Ⅳ. 1. on the land2. put; into 3. flying kites4. at this time of year

5. on the beach6. in the hot weather 7. throw away 8. fall from

9. plant trees10. in the south of

句型演練

Ⅰ. 1. sunny2. to have3. kites 4. brightly5. talking

6. Is7. go8. pollution 9. interesting10. snowmen

Ⅱ. 1. get warm 2. is some3. dangerous to4. weather like

5. provides; with6. go on 7. spend 8. One quarter

第5版寒假作業（五）語法專練

Ⅰ. 1-5 DBCAB 6-10 ACBDC

Ⅱ. 1. Are there any 2. It is important 3. What’s; like4. There isn’t

5. What; look like 6. Is it snowy 7. Yes; there is 8. It is exciting

9. birds are there10. These computers are

Ⅲ. 1. is 2. windy 3. interesting 4. are 5. to learn

6. women 7. are 8. lovely 9. to have 10. funny

Ⅳ. 1. There is2. It is interesting3. a cup of coffee

4. far from here 5. warm these days

Ⅴ. 1. A is改為are2. D homeworks改為homework 3. C pair改為pairs

4. D a改為an 5. C finishing改為to finish

第6版寒假作業（六）讀寫綜合篇

補全對話

A篇 1-5 DCFBA

B篇 1-5 FGBAC

完形填空

1-5 ACADD 6-10 BCBDA

閱讀理解

1-5 CBCAD

書面表達

One possible version:

Hello, everyone.

I have a healthy lifestyle. Every morning I exercise with my father. We often run and play basketball. I have a good eating habit. I try to eat more fruit and vegetables, and I hardly ever eat junk food. I drink milk every morning. I think it’s good for my health.

In my free time, I never play computer games. Usually I go to bed early and get up early.

第7版寒假作業（七）詞匯與句型篇

詞匯運用

Ⅰ. 1-5 beadc

Ⅱ. 1. diary 2. nervous3. camera 4. postcard5. machine

6. guide7. bridge 8. direction 9. beauty 10. building

Ⅲ. 1-5 CCDBA

Ⅳ. 1. feel about 2. are going to 3. such as

4. get weak5. light up 6. Are; able to

7. tie; to 8. in every direction 9. One of10. go bad

句型演練

Ⅰ. 1. beauty 2. sightseeing 3. to have 4. friends5. send

6. places7. take 8. to teach9. leave10. will have Ⅱ. 1. have to2. in the centre of3. so that

4. as; as we can5. walk along

Ⅲ. 1. don’t like 2. No; they aren’t3. How many

第8版寒假作業（八）語法專練

Ⅰ. 1-5 CDABA6-10 DBCAB

Ⅱ. 1. are going to 2. Is Sam going 3. No, he won’t

4. Yes; it is 5. isn’t going to

Ⅲ. 1. have 2. asks 3. walk 4. are 5. doesn’t

6. fails7. to use8. forgets 9. likes 10. comes

Ⅳ. 1. can finish it2. in two hours3. will play with

4. are going to the museum 5. If you need it

Ⅴ. 1. B 去掉will2. B having改為have3. D am going to改為will

4. D 去掉going5. B don’t改為doesn’t 6. C snowing改為snow

7. D去掉will 8. B worked改為works9. D won’t改為will

10. A going not改為not going

第9版寒假作業（九）讀寫綜合篇

補全對話

A篇 1-5 FDCEA

B篇 1-5 FGDAB

完形填空

15 ABDCD 6-10 BCAAD

閱讀理解

1-5 ABCDD

書面表達

One possible version: spent the vacation in different places. Jia Qian, Huang Fan and I went to Center Park. We took a lot of photos there. Liu Fan and Guo Wei went to the Phoenix Islands, Sanya. They did something interesting there. Zhang Yue and Kong Ying went to Qingdao. There were many people swimming in the sea. They played beach volleyball with their friends. We all had fun.

第10版寒假作業（十）詞匯與句型篇

詞匯運用

Ⅰ. 1. attend2. recent3. amazing 4. ant 5. follow

Ⅱ. 1. rocket 2. butterfly 3. headlines 4. ago 5. information

6. stamp 7. disappeared 8. granddaughter 9. newspaper 10. something Ⅲ. 1-5 BBDAC

Ⅳ. 1. drawing pictures2. disappeared into3. go inside

4. a collector of5. Are; interested in6. is bad for

7. go for a walk8. all the way

9. launch; into 10. a waste of

句型演練

Ⅰ. 1. hers 2. to play3. amazing 4. to write 5. to begin

6. water 7. surprised 8. unusual 9. collection10. studying

Ⅱ. 1. a picture of2. how to3. living room

4. to take 5. playing

Ⅲ. 1. Can you help me look for the remote control?

2. Is the magazine yours or his?

3. My mother wants me to learn about some skills.

第11版寒假作業（十一）語法專練

Ⅰ. 1-5 BADCA6-10 BDABC

Ⅱ. 1. Yes; she did 2. is Linda’s 3. did Jenny leave4. didn’t clean

5. did John do 6. Did Tom bring 7. Whose jacket 8. No; they didn’t

9. What was; like10. Is this Mary’s

Ⅲ. 1. came 2. him 3. joined 4. Their 5. sent

6. was7. its8. her 9. had10. his

Ⅳ. 1. visited our school 2. played the guitar 3. him some old pictures

4. ate a hamburger 5. isn’t ours

Ⅴ. 1. D walk改為walked 2. D her改為hers 3. A puts改為put

4. B stayed改為stay 5. C it’s改為its

第12版寒假作業（十二）讀寫綜合篇

補全對話

A篇 1-5 DFEAB

B篇 1-5 GFBCA

完形填空

1-5 ABDBC 6-10 DBCAA

閱讀理解

1-5 ABCCD

書面表達

One possible version: My favorite star is Jackie Chan. He is a great actor. I like him very much. I think his movies are exciting and he is a friendly movie star. Most of his movies are very successful action movies. I like his movies best.

Jackie Chan is one of the most popular stars in the world. He is living in Hong Kong now. He likes Beijing Opera. He has many fans, like me.

篇三：九年級學英語報答案

九年級學英語報答案

一、聽力測試（共20小題，計25分)

注意：聽力測試分四部分，共25小題。做題時，先將答案畫在試卷上，錄音內容結來后, 將所選答案轉涂到答題卡上。

(一) 聽句子，選擇與句子內容相對應的圖片，每個句子讀兩遍，

請看第一組的四個圖片，聽每個句子，完至第3小題。

1. ________ 2. ________ 3. ________

請看第二組的四個圖片，聽三個句子，完成第4至第6小瓶，

4. ________ 5. ________ 6. ________

(二) 聽對話和問題，根據所聽內容，選擇最佳答案。對話和問題都讀兩遍。

7. A. In May. B. In March. C. In November. D. In September.

8. A. $30.B. $ 300. .C. $60.D. $ 600.

9. A. Because it's funny.B. Because it’s exciting.

C. Because it’s scary.D. Because it’s sad.

10. A. Never. B. Every day. C. Once a week.D. Twice a week.

11. A. Jack.B. Sam. C. Bob. D. Tom.

12. A. Clean the living room and the kitchen.

B. Sweep the floor and take out the trash.

C. Clean the kitchen and take out the trash.

D. Sweep the floor and clean the living room.

13. A. A hamburger and French fries.

B. A hamburger and ice cream.

C. French fries and ice cream.

D. French fries and coffee.

14. A. A bookstore. B. A drugstore. C. A bank.D. A museum.

(三）聽短文，根據短文內容，判斷下列句子正誤，正確的用“A”表示，不正確的用“B”表示, 短文讀兩遍。聽短文前，你們有20秒鐘的時間閱讀下列句子。

15. Mike Green is a special artist.

16. He is from America.

17. He can create art while he is awake.

18. At the age of 4, he began to sleepwalk (夢游) and draw.

19. So far, he has produced 150 pieces of art while sleeping.

20. Some of the art is about the events in his life.

請考生們翻到第9頁，先找到第五大題的A)部分。你們將有5秒鐘的準備時間。

二、單項填空（共15小題。計15分）

選擇最佳答桊。

21. English is my favorite subject, and I am good ______ it.

A. for B. to C. at D. of

22. Did you know that the Garth is home to ______ animals?

A. millionB. millions C. million of D. millions of

23. The family had to stay at the hotel, ______ it was raining hard.

A. becauseB. although C. untilD. unless.

24. Life is ______ dictionary. We should learn directly from it.

A. weB. usC. ourD. ours

25. Traveling to space is no longer just a dream. Russia ______ the first hotel in space in the near future.

A. builds B. will buildC. built D. has built

26. Many students comc from poor families and they ______ afford school lunches, so the government is trying to help them.

A. needn’t B. shouldn't C. can’tD. mustn’t

27. China plans to let tourists ______ the Xisha Islands in the South China Sea this year.

A. visit B. visitsC. visiting D. visited

28. I asked two people the way to the station, but ______ of them could help me.

A. both B. neitherC. eitherD. all

29. It ______ Mi Green an hour to fix up his bicycle yesterday.

A. cost B. paidC. spent D. took

30. Breakfast is ______ meal of the day. It provides us with energy after a long night without food.

A. important B. more important C. the most important D. very important

31. If you love what you are doing and work hard, you will ______ anything difficult and succeed.

A. get to B. get overC. get onD. get up

32. — ______ have you lived with your grandparents?

—About three years.

A. How long B. How manyC. How much D. How often

33. Every year, more than 70,000,000 sharks ______ for their fins (魚翅).

A. were killedB. have killedC. are killed D. will kill

34. I wonder _______ on April 23, World Book Day. Did you find some interesting books to read?

A. what did you do B. what you didC. what do you do D. what you do

35. — We are going on a school trip tomorrow.

— ______.

A. Excuse me B. I’m sorry to hear that C. You’re welcome D. Have a good time

三、完形填空（共10小題.計10分) 根據短文內容，選擇最佳答案。

We are now living in the 21st century. Is your classroom living in the 21st centuiy, too? Tony is a student in Grade 8 at an American middle school. He was surprised when he saw his modern36on his first day of schobl.

In Tony’s classroom, there are many new electronics (電子設備) like iPads. This semester, they will37the electronics to take notes, watch videos and do projects and homework. “It’s38 ”said Tony. “I prefer using an iPad to work on math or other projects39my team members.”

The school uses new technology‘(技術）in classrooms to help students see, hear, touch and sometimes experience their tasks, technology is pretty common in most of our classrooms now,” the head teacher said. “We are trying to use technology to40the world to kids. It can bring the outside world in.”

Science teacher Mr Miller agrees. “It is a41 way for students to know the outside world,” he said.

Mr Miller now regards himself as a guide of learning42as a teacher. “If they have a question for me, I will try to teach them43to find the answers rather than tell them what the

answers are,” he said.

Dale, another student, loves technology. He was not really interested in class before,44 now he likes the classes very much. “It helps me use what I know about technology at school,” Dale said. “Most importantly, I45the classroom. This, of course, will help my studies.”

36. A. dormitoryB. playground C. libraryD. classroom

37. A. allow B. useC. wantD. help

38. A. boringB. relaxing C. amazing D. disappointing

39. A. on B. byC.at D. with

40. A. open upB. look up C. put upD. call up

41. A. wrongB. slowC. quickD. bad

42. A. because ofB. instead of C. according to D. thanks to

43. A. why B. whatC. whenD. how

44. A. but B. and C. orD. so

45. A. stand B. hateC. enjoyD. dislike

四. 閱讀理解

(一）閱讀短文，完成46—55小題。（共10小娌，計10分）

Jeff has an illness. He is recording (錄音）his words so that his little son will be able to hear his voice in the future.

Jeff caught the illness in 2011. The doctor told him that he might have only two to five years to live and the illness would make him lose his voice, so he decided to record his voice for his 13-month-otd son, Bill.

His wife Gina said, “Jeff used to play and sing in a band, so his voice is important to him. I can't imagine not having his voice around. I would certainly like Bill to know his father's voice in this way.”

Jeff and his wife hope that they can save his real voice for their little son. He now spends his weekends and evenings recording his voice. Their little son, Bill, will feel his parents’ love when he grows up.

根據短文內容，判斷下列句子正誤。正確的用‘A”表示，不正確的用“B”表示?

46. Jeff caught the illness in 2011.

47. Jcff’s illness would make him become blind.

48. Jeff still plays and sings in a band now.

49. Jeff now spends his weekends and evenings recording his voice.

50. The parents hope that Bill will feel their love by hearing his father’s voice.

DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In I860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”（基因） in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages. They’re written in the DNA with a special language.

In 1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell (細胞）to build its parts,(有幾個單詞看不清) the words in the

DNA map, but we still do not understand what they all do. By understanding what just one “word” means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.

Most people hope that this will help to make better medicine and help sick people: Other people worry that when wc Icam more “words” and find out more information, we will use it in the wrong way, just to make people more attractive (有吸引力的), or stop sick people getting jobs. 根據短文內容，選擇最佳答案。

51. When did Mr Mendel discover why we look the same as other people in our family?

A. In 2000. B. In 1961.C. In 1953. D. In 1860.

52. What did the two scientists find in 1961? They found ______.

A. all the words in the DNA map

B. small things called “genes” in our body

C. the first “word” they could understand in that language

D. those small parts arc written in the DNA with a special language

53. How can we help sick people if we understand more “words” in the DNA map?

A. Make better medicine.B. Make them get jobs.

C. Make maps for them. D. Make them attractive.

54. Which one is not true according to the article?

A. Wc look like our parents because of “genes” in our body.

B. We have understood what all the words in the DNA map do.

C. DNA is the whole “map” of the human body.

D. DNA tells the cell to build its parts.

55. What do people think about this research about DNA?

A. It can be only bad. B. It can be only good.

C. It can be good but won’t work. D. It can be good and bad.

(二）閱讀對話，完成第II卷第五大題的61-65小題。

Lana went to see a new movie in the morning. But she didn't enjoy it. She’s talking to Jenny about what happened.

Jenny: You look unhappy.61

Lana: I watched a movie in the morning.

Jenny:62

Lana: No. The movie was great. It was the audience (觀眾)..Some people were late for the movie, some took phone calls during the movie, some made noise while eating snacks and some talked loudly.63

Jenny: That’s too bad! People should obey certain rules while watching a movie.

Lana: Yes. The first thing is to keep the theater quiet. We should sit down before the movie begins.64We should eat snacks quietly. And we should talk as little as possible.

Jenny:65And we should take away our rubbish when we leave.

Lana: I hope everyone should do these things so that we can enjoy the movie better.

Jenny: Me too.

A. I was annoyed all the time.

B. Who did you go to the movie with?

C. Yes, you are right

D. How wonderful the movie was!

E. What’s wrong with you?

F. We should turn off our mobile phones.

G. So the movie was boring, wasn’t it?

(三) 閱讀短文，完成第II卷第五大題的66~70小題，

How do you get to school every day? By bike, bus or car? In Chongqing, there will be 3,000 new school buses on the street by the end of this year. These school buses look just like tlic American school buses: yellow with a big nose.

In February 2010, the Chinese government announced the first standards (標淮）for school bus safety. Since then, more yellow school buses can be seen on the street.

In China, besides the bus driver, there should be an adult on the school bus to watch the students. If there are more than 40 students, two adults are needed. The students usually rest or read books on the school bus.

In America, yellow school buses are very popular. There are about 480,000 school buses in the country. The older kids sit in the back of the bus. The younger kids sit in the front. They usually listen to music, talk on their phones or just sleep. The only adult on the bus is the driver.

The school bus is important in students’ everyday lives. It can keep children safe. Usually a child is much safer going to school by school bus than any other way. It can also help the environment.

A school bus saves a lot of gas (汽油）because it can carry a lot of people.

絕

試卷類型：A 密★啟用前

2012年臨沂市初中學生學業考試試題

英語

第II卷（非選擇題共65分）

注意事項: 1. 第II卷共4頁，請用鋼筆或圓珠筆直接答在試卷上。

2.答卷前請將密封線內的項目及座號填寫清楚。

A) 聽寫。聽對話，根據對話內容完成下列句子，毎空詞數不限。對話讀三遍。聽對話前，你們有20秒鐘的時間閱讀下列句子。 (共5小題，計5分）

56. Nick is a student from Class __________，Grade 8.

57. Nick wants to be a volunteer during the _________________ vacation.

58. Nick is ____________________ in farm work.