分析 這篇短文講述的是由于人類的活動(dòng),對(duì)地球造成的一些影響.人類的很多行為對(duì)地球是有利的,但是更多的行為是對(duì)地球有害的.作者主要從水污染、空氣污染、土壤污染和對(duì)未來(lái)的希望來(lái)論述的這一話題.
解答 54-56 CBA
54.C.細(xì)節(jié)理解題.根據(jù)短文第一段中The earth is 4600million years old可知地球已經(jīng)46億 年了,故選C.
55.B.推理判斷題.根據(jù)短文第二段All over the world,people have cut down millions of trees.When it rains or when the wind blows,the earth is taken away.Forests have become desert,so more and more different sorts of animals and plants are disappearing.可知應(yīng)該多種樹,可知樹越多越好,故選B.
56.A 推理判斷題.根據(jù)Carbon dioxide (CO2)in the air has increased a lot.It comes from burning oil,coal and wood.This has formed(形成)a"blanket"around the earth可知來(lái)自煤,油和樹木的二氧化碳形成了二氧化碳層環(huán)繞著地球,故選A.
點(diǎn)評(píng) 本題首先要通讀全文,了解大意,緊緊抓住上下文語(yǔ)境所提供的信息,然后明確詞意和詞的搭配,并注意上下連貫,合乎邏輯,最后通讀全文,細(xì)心檢查.
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