Threes are useful to man in three very importa
问题详情
Threes are useful to man in three very important ways: they provide him wood and other products; they give him shade; and they help to prevent drought (干旱) and floods. Unfortunately, in many parts of the world, man bas not realized that the third of these services is the most important. In his eagerness to draw quick profit from the trees, he has cut them down in large numbers. Two thousand years ago, a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It gained the empire but, without its trees, its soil became bare and poor. When the empire fell to pieced, the country found itself faced by floods and starvation. Even where a government realizes the importance of a plentiful supply of trees, it is difficult sometimes to make the people realize this. They cut down the trees but are too careless to plant and look after new trees. So, unless the government has a good system of control, or can educate the people, the forests slowly disappear. This does not only mean that there will be fewer trees. The results are even more serious: for where there are trees, their roots break the soil up, allowing the rain to sink in, and also bind the soil. This prevents the soil from being washed away. But where there are no trees, the rain falls on hard ground and flows away on the surface, and this causes floods and the rain carries away the rich topsoil in which crops grow. When all the topsoil is gone, nothing remains but worthless desert. Trees are useful to man mainly in three ways, the most important of which is that they can __________ . A. Keep him from the hot sunshine
B. enable him to build warships
C. make him draw quick profit from them
D. protect him from droughts and floods
It’s a great pity that __________ .A.man is only interested in building empires
B.man is eager to profit from trees
C.man hasn’t realized the importance of trees to him
D.man hasn’t found out that he has lost all trees
Sooner or later the forests will disappear __________ .A.unless a country has a plenty supply of trees
B.unless people stop cutting down their trees
C.unless all people are taught the importance of planting trees
D.unless the government punishes those who cut trees instead of planting them
When there is a heavy rain, trees can help to prevent floods, as they can __________ .A.keep rain from falling down to soft ground
B.cause the soil to allow rainwater to sink in
C.prevent the soil from being washed away
D.make the topsoil stick together
The word “bind” in Paragraph 5 means “__________”.A.to wash away
B.to make wet
C.to make stay together
D.to improve请帮忙给出每个问题的正确答案和分析,谢谢!
参考答案
问题 1 答案解析:D
细节题。原文第一段指出树以三种方式有益于人类,第二段第一句话说世界上许多地方的人不知道第三种最重要,第三种是防旱防洪,因此选项D是正确答案。
问题 2 答案解析:C
综合判断题。本文的主要目的在于指出树有益于人类,然而遗憾的是人类只为了眼前利益而乱砍滥伐,没有真正懂得树的重要性,因此选项C是正确的;而人类渴望从树身上获利这本身并没错,只是不该没有节制,所以选项B不正确。
问题 3 答案解析:C
细节题。原文第四段最后一句话说除非政府加以有效控制或教育人民,森林才不会消失,也就是说当所有人都了解树的重要性,不乱砍滥伐,森林才不会消失,因此选项C是正确的;选项A说除非这个国家树木充足,与原文不符,树木再多,光砍不种也会砍光;选项B“除非所有人都不砍树”和选项D“除非政府惩罚那些砍树而不是种树的人”也与原文不符,并不是要不砍树,而是要砍种结合。
问题 4 答案解析:B
细节理解题。原文最后一段说明了树木的水土保持作用,树根切碎了泥土,让雨水渗入,从而保持了土壤,防止其流失,另一方面又防止雨水流走,形成洪水,所以选项B“树木通过让雨水流入封防止在大雨时形成洪水”是正确答案。
问题 5 答案解析:C
词语释义题。“bind”一词出现在最后一段第二句话,这保有话说明了树的地壤保持作用,树根切碎了泥土,让雨水渗入,从而保持了土壤,防止菘流失,因此根据上下文,“bind”的意思是留住、约束住,选项C是正确答案。