问题标题:
帮我做初二的英语阅读Whydoplantsgrowinsomeplacesandnotinothers?Whydoessomelandhavesomuchgrowingonit,whileotherlandhasalmostnoplantsgrowingonitatall?Togrow,plantsneedseveralthings.Oneiswarmth.Inverycoldp
问题描述:

帮我做初二的英语阅读

Whydoplantsgrowinsomeplacesandnotinothers?Whydoessomelandhavesomuchgrowingonit,whileotherlandhasalmostnoplantsgrowingonitatall?

Togrow,plantsneedseveralthings.Oneiswarmth.Inverycoldplacesalmostnothinggrows.Plantsalsoneedwater.InverydrypartsoftheEarthonlyafewunusualplantscangrow.That'swhydrydesertseverywherearealmostnotcoveredbytreesorgrass.

Plantsmustalsohaveaplaceinwhichtoputdowntheirrootsandgrow.Theyfinditdifficulttogrowonhardland.Thetownisbuiltonhardland.Theplantsherehaveonlythesoilfoundbetweenthecracksofthestonestogrowin.

Anotherthingplantsmusthavebeforetheycangrowisfood.

Whatwillhappenifwetrytomakethingsgrowonthesandybeach?Afewplants,suchasbeachgrass,willgrowinsand,butmostplantswon't.Eveniftheweatheriswarmenoughandwewatertheplantseachday,manyofthemwilldiebecausethesandonthisbeachhasalmostnofoodforplants.

46.Accordingtothepassage,plantsneed______thingstogrowwell.

A.twoB.threeC.fourD.five

47.Whatdoestheunderlinedword"cracks"meaninthetext?

A.缝隙B.表面C.夹层D.底部

48.Fromthepassage,wecanknowitisforplantstogrowindryplaces.

A.easyB.difficultC.impossibleD.important

49.Thereasonwhymostplantscan'tgrowonthesandybeachisthat_______.

A.thereisn'tenoughsunlightB.thereistoomuchwater

C.itistoocrowdedthereD.ithaslittlefoodforplants

50.Thepassagecanmostprobablybefoundina______book.

A.scienceB.historyC.travelD.math

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