2.Trees are useful to man in three important ways:they give him wood and other useful things,they give him cool places,and they help to stop drought (干旱) and flood.
Unluckily,in many parts of the world,man has not found that the third of these points is the most important.Man wants to make money from trees,so he has cut them down in large numbers,only to find that without them he has lost the best friends he had.And also,he is usually too careless to plant and look after new trees.So the forests slowly disappear.
This does not only mean that man will have fewer trees.The results are even worse:for where there are trees,their roots(根)break up soil-make the rain in-and also bind (固定) the soil,thus stopping it from being washed away easily; but where there are no trees,the rain falls on hard ground and flows away,causing floods and carrying away the rich top-sil.When all the top-soil is gone,nothing is left but
useless desert.

54.The most important points of trees to man is thatC.
A.they help him to make money
B.they give him cool
C.they help him to stop drought and floods
D.they give him wood and other things
55.In many places forests slowly disappear becauseD.
A.many trees have been cut down by man
B.new trees are not well looked after
C.man has not paid enough attention to planting trees
D.a(chǎn)ll the above
56.Land becomes desert(荒地)after all trees are cut down becauseD.
A.roots of trees break up the soil             B.there are too many rainfalls
C.strong winds bring a lot of sand
D.there are no longer trees to keep the rain and protect the top-soil
57.Which title best fits the passage?A
A.Trees and Man
B.The Function of Tree Wood
C.How do People do with Trees?
D.The Usage of Tree Roots.

分析 本文是一片說明文.本文講述了人和森林的關(guān)系.森林對于人類有很重要的意義,但最重要的是森林能夠阻止洪澇和干旱.人們?yōu)榱藪赍X,會砍伐樹木去賣錢.但是卻很不認真的種新的樹木,所以樹木越來越少,干旱和洪澇頻發(fā),最終會變成沙漠.

解答 答案:CDDA.
54:C.細節(jié)理解題.根據(jù)Trees are useful to man in three important ways…they help to stop drought and flood.man has not found that the third of these points is the most important.樹在三個方面對人類有幫助,第三點是幫助阻止干旱和洪澇,人類現(xiàn)在還沒有發(fā)現(xiàn)其實第三點是最重要的,故C選項正確.
55:D.細節(jié)理解題.根據(jù) so he has cut them down in large numbers人類砍了很多樹 he is usually too careless to plant and look after new trees.So the forests slowly disappear.但是總是太不認真種,也不認真照顧新的樹.所以森林慢慢減少.故D 選項正確.               
56:D.細節(jié)理解題.根據(jù)where there are no trees,the rain falls on hard ground and flows away,causing floods and carrying away the rich top-soil.When all the top-soil is gone,nothing is left but useless desert.當沒有樹的時候,下的雨就把土地沖走,引起洪澇,帶走肥沃的土壤.可以知道,當所有的頂部沃土都被沖走時,除了沙漠什么都沒有留下,故D 選項正確.                        
57:A.標題歸納題.根據(jù)整篇文章,都是講述人和樹木的關(guān)系,故A 選項正確.

點評 閱讀理解考查對文章的理解能力,在閱讀全文的基礎(chǔ)上,找出選項在文中對應(yīng)位置,細節(jié)理解題應(yīng)注意精確準確,不能以偏概全.

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