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  【Ecology(生态学)isthescienceofhowlivingcreaturesandplantsexisttogetheranddependoneachotherandonthelocalenvironment.Whereanen?vironmentisundisturbedtheecologyoftheareais1innaturebalancebutifac】

   Ecology(生态学)isthescienceofhowlivingcreaturesandplantsexisttogetheranddependoneachotherandonthelocalenvironment.Whereanen?vironmentisundisturbedtheecologyoftheareais1      innaturebalancebutifacreaturediesoutoranewspeciesis2      thentheecologyofthear?eawillbeupset.Inother3      thebalanceofnaturewillbe4      .

   Manisapartofthe5      andhasdonemoretoupsettheecologyduring6      shortspanonearththan7      otherlivingcreature.Hehasdonethisbyhisignorancehis8      histhoughtlessfoolishnessandhisuncontrolledwastefulness.

   Hehaspoisonedthe9      andpollutedbothlandandwater.Hehaswastedtheearth'snatural10      withnothoughtforthefutureandhasthoughtoutthemostdevastating(毁灭)waysofkillinghisfellowmenandeveryothersortoflifeatthesametime.

   Sincemanhasdonesomuchdamageitisuptomantotryto11      thewayheactsifitisnotalreadytoo12      Ifthereistobeanyremedy(补救法)forourillsthatremedyultimatelyliesinthehandsofthe13      andthesoonertheystartdoingsomethingaboutitthe14      .

   Oneofthemain15      oftheearth'stroublesisthattheworldistoo16      andthatthisoverpopulationisgrowingatanevei^increasingrate.Atthesametimeweare17      upournaturalresources―fuelsandmineralores―ataneverincreasingratewithno18      ofreplacingthem.

   Formanyyearstheearthhasbeenunableto19      enoughfoodfortheserapidlyexpandingpopulationsandthepositionhasbeensteadilygettingworse20      someofourrichestsoil waslostandvastareasthatwereoncefertilelandswereturnedintodeserts.

  1.A.kept   B.stopped   C.finished   D.lost

  2.A.foundout   B.broughtin

   C.brokendown   D.tookout

  3.A.cases   B.speeches   C.ways   D.words

  4.A.changed   B.troubled   C.kept   D.damaged

  5.A.environment   B.situation   C.science   D.condition

  6.A.their   B.one's   C.one   D.his

  7.A.any   B.an   C.all   D.most

  8.A.greed   B.hope   C.fear   D.desire

  9.A.sky   B.heaven   C.air   D.space

  10.A.energy   B.resources   

1回答
2019-05-25 15:10
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黄豫蕾

  1.A根据句意,如果这里的环境没有受到干扰,这里就可以保持(keep)生态平衡。2.Bbringin表示"引进,引人"。3.Dinotherwords表示"换句话说,换而言之"。4.D这时生态平衡就会遭到破坏(damage)。5.A人类是...

2019-05-25 15:14:35

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