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1、高考英語(yǔ)素能提高題：Unit2《Growingpains》（譯林牛津版必修1）Ⅰ.填詞Hairisoneofthecommonestpartsofthebodyandsomethingthatisgivenalotofattention.You’vehaditsincebirthandyoutakecareofiteveryday.Buthowmuchdoyouknowaboutyourhair?Theaverageheadofhairismadeupof100strands(根)，eachofwhichhas
2、alifeexpectancyofaboutthreeyears.Whilesomehairsaregrowing，othersareresting，andothersarefallingout.Ahairismadeupoftwoparts：theshaft(發(fā)絲)andtheroot.Theshaftisavisible(or：seen)part.Ithasacomplexstructure.Therootisthelivingpartofthehair.Itisherewherecellsdevelopa
3、ndformtheshaft.Italsohasaverycomplexstructure.Everydayanormalheadofabout100hairswilllosebetween50and100hairs—or30,000hairsperyear.Hairdies，fallsout，andgrowsagain.Thelifecycleismadeupofthreestages.First，alongandactivegrowthperiodthatlastsaboutthreeyears—theha
4、irgrows.Second，averyshorttransition(過渡)periodthatlastsaboutthreeweeks，duringwhichtimethehairisinactive—thehairfollicleshrinks.Third，arestingperiodofaboutthreemonths—attheendofthisperiodthehairispushedoutandlost.Thiscyclerunsconstantlythroughoutlife.Ahairgrow
5、sfrom1to1.5cmeachmonthanditsusuallifeexpectancyisaboutthreeyears.Soverylonghairisrarelyseen.However，therearesomepeoplewhodogrowlonghair.Themostcommonformofhairlossdoesnotcomefromdisease.Infactwecanalmostsayitisasecondarysexualcharacteristic.Itiscalledandroge
6、neticalopecia(alsoknownaspatternbaldness)andresultsfromacombinationofgeneticandhormonal(荷爾蒙的)factors.Therearetwosortsofmelanin(黑色素)presentinalltypesofhair，indifferentproportions.Thesemakeitpossibletogetthedifferentshadesofcolor—blonde(orgolden)，brownorred.Ti
7、tle：__1__Ⅱ.簡(jiǎn)答題Somescientistssaythattheworld’soceansareslowlygettingmoreacidic(酸)．AccordingtotheresearchersfromCalifornia，thechangeistakingplaceduetohigherlevelsofcarbondioxide(二氧化碳)intheair，whetheryounoticeditornot.Theloweringofthewater’sPHvalueisnotgreatatt
8、hemomentbutcouldmakethelivingthingsintheseaingreatdangerifitcontinues，theywarn.KenCaldeiraandMichaelWickett，fromtheLawrenceLivermoreNationalLaboratory，reporttheirworriesinthejournalNature.Increa
