第十二周周测试卷及答案

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1、2015-2016年高二第二学期第十二周周测答题卡：（总分：50分）1、2、3、4、5、6、7、8、9、10、H、12、13、14、15、16、17、18、19x20、21、22>23、24、25、26、27、28、29、30、31、32、33、34、35、一、（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项屮选出能填入空白处的最佳选项。选项屮有两项为多余选项。CoralreefsFormillionsofyears,coralreefshaveprovidedhomesandfoodforthousandsofdifferentlivingthings.Fishan

2、dseabirdssharethereefwithotherseacreatures.Nowthesebeautifulplacesareindanger.]Scientistshavefoundthatpeopleandpollutionhaveruinedmorethanone-fourthoftheearthscoralreefs・Unlessthingschange,alloftheremainingreefemaydiewithinyourlifetime.Somepeoplethinkthatcoralisstonebecauseofitsrough,hardsurfac

3、e.Butcoralisananimal!Tinypolyps（水虫息体）formthecoralreefs.2Thesecolourscomefromthealgae（海藻）livinginsidethecoral.Billionsofcoralpolypssticktogether.Newonesgrowonthedeadcorals.Thishappensyearafteryear・Overtime,thecoralbuildsupareefThereefrisesfromtheoceanflooruntilitalmostreachesthesea'ssurface.Itta

4、kescoral500,000yearstobuildahugereef.3Thecoralreefshavebeenharmedindifferentways.Peoplehavebrokenoffpiecesofcoral.Theywantedtosellorkeepthem.Tocatchmorefish,peoplehavedroppedsticksofdynamite（炸纟勺）intothewater.4Waterpollutionhasencouragedovergrowthoftheseaplantsthatgrownearcoralreefs.Theyblockout

5、thesunlightthatthealgaeneed・5Warmwaterkillsthealgae.Whenthealgaedie,thecorallosesbothitsfoodanditscolor.Thecoralturnswhiteanddies.Scientistscallthiscoralbleaching（珊瑚白化）.Thebleachedpartofthecoralreefcannotrecover.A.Theycomeinmanycolours・B.Thishasblownuppartsofthereefs.C.Soarealltheseaplantsandan

6、imalsthatdependonthem.D.Theworstproblemistheheatingupoftheworldsoceans.E.Coralreefcarcexperiencingarapidincreaseinmostlocations.F.However,ithastakenhumanbeingslessthan100yearstodestroythereefs.G.Theycoverlessthan1%oftheoceanfloor,butsupportabout25%ofseacreatures.二：完形填空（共20小题；每小题1・5分，满分30分）阅读下面短

7、文，从短文后各题所给的四个选项（A、B、C不口D）中，选出口J以填入空白处的最佳选项。AspecialladylivedonafarminGrace,Idaho.Toovercomeevery6orstrugglethatcameherway,shewentfarbeyondthecallofduty.Shewasawidow（寡妇）with9children.Insteadof7ofherhardlife,sheacceptedherfate（命运）an