高中英语unit7thesea单元检测北师大版

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1、Unit7TheSea第Ⅰ卷第一部分　听力(略)第二部分　阅读理解(共两节，满分40分)第一节(共15小题；每小题2分，满分30分)阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。AAbouttenmenineveryhundredsufferfromcolorblindnessinsomeway.Womenareluckier;onlyaboutoneintwohundredisaffectedinthismatter.Perhaps，afterall，itissafertobedrivenbyawoman!Therearedifferentformsofcol

2、orblindness.Insomecases，amanmaynotbeabletoseedeepred.Hemaythinkthatred，orangeandyellowareallshadowsofgreen.Sometimesapersoncannottellthedifferencebetweenblueandgreen.Inrarecases，anunluckymanmayseeeverythinginshadesofgreen—astrangeworldindeed.Colorblindnessinhumanbeingsisastrangethingtoexplain.In

3、asingleeyetherearemillionsofverysmallthingscalled“cones(圆锥细胞)”．Thesehelpustoseeinabrightlightandtotelldifferencebetweencolors.Therearealsomillionsof“rods(杆状细胞)”，buttheseareusedforseeingwhenitisneardark.Theyshowusshapesbutnocolors.Someinsectshavefavoritecolors.Mosquitoes(蚊子)preferbluetoyellow.Are

4、dlightwillnotattractinsects，butabluelampwill.Inasimilarwayhumanbeingsalsohavefavoritecolors.Yetwearelucky.Withtheaidoftheconesinoureyeswecanseemanybeautifulcolorsbyday，andwiththeaidoftherodswecanseeshapesatnight.Onedaywemayevenlearnmoreabouttheinvisiblecolorsaroundus.21．Thepassageismainlyabout.A

5、．coloranditssurprisingeffectsB．womenbeingluckierthanmenC．dangercausedbycolorblindnessD．colorblindness答案　D解析　主旨大意题。本文主要讲述的是“色盲”，介绍了色盲形成的原因，并说明了昆虫对颜色的偏好。故D项正确。22．Accordingtothepassage，withthehelpofthe“cones”，wecan.15A．telldifferentshapesB．seeinaweaklightC．killmosquitoesD．tellorangefromyellow答案　D解析

6、　细节理解题。根据第三段中的第二、三两句“Inasingleeyetherearemillionsofverysmallthingscalled‘cones’．Thesehelpustoseeinabrightlightandtotelldifferencebetweencolors.”可知，cones可帮助我们辨别颜色。故D项正确。23．Whydosomepeoplesayitissafertobedrivenbywomen?A．Womenaremorecareful.B．Therearefewercolorblindwomen.C．Womenarefonderofdrivingth

7、anmen.D．Womenareweakerbutquickerinthinking.答案　B解析　细节理解题。根据第一段“Abouttenmenineveryhundredsufferfromcolorblindnessinsomeway.Womenareluckier;onlyaboutoneintwohundredisaffectedinthismatter.Perhaps，afterall，itissafertobedrivenbyaw