B
Abouttenmenineveryhundredsuffer fromcolor blindnessinsomeway.Womenareluckier;only about one in two hundredis affected in this matter.Perhaps, after all, itis safer to bedriven byawoman!
Therearedifferentformsofcolorblindness.Insomecasesamanmaynotbeabletoseedeepred. Hemay thinkthatred,orangeandyellowareallshadowsofgreen.Sometimesapersoncannottellthe differencebetweenblueandgreen.Inrarecasesanunluckymanmaysee everything inshadesofgreen-- astrangeworld indeed.
Colorblindnessinhumanbeingsisastrangethingtoexplain.Inasingleeyetherearemillionsof verysmall things called "cones".Thesehelp us to seein a bright lightand to tellthe difference
betweencolors. Therearealsomillionsof"rods",buttheseareusedforseeingwhenitisneardark.They show us shapebut no color.
Someinsectshavefavoritecolors.Mosquitoespreferbluetoyellow.Aredlightwillnotattractinsects, butabluelampwill.Inasimilarwayhumanbeingsalsohavefavoritecolors.Yetwearelucky.Withthe aidoftheconesinoureyeswecanseemanybeautifulcolorsbyday,andwiththeaidoftherodswecan seeshapesat night. Onedaywemayeven learnmore about theinvisible colors aroundus.
24.Thepassageis mainlyabout . A. color and its surprisingeffects
B. women beingluckier than men
C. danger caused bycolor blindness
D. color blindness
25.Accordingto thepassage, withthe help of the"cones",wecan . A. telldifferent shapes B. seeinaweak light
C. kill mosquitoes D. tellorangefromyellow
26.Whydo somepeoplesayitis safer to bedriven bywomen? A.Women aremore careful.
B.Therearefewer color-blind women.
C.Women arefonder ofdrivingthan men.
D.Women areweaker but quicker in thinking.
