首页
登录
职称英语
Trees are useful to man in three important ways: they provide him with wood
Trees are useful to man in three important ways: they provide him with wood
游客
2024-01-18
69
管理
问题
Trees are useful to man in three important ways: they provide him with wood and other products; they give him shade; and they help to prevent droughts and floods.
Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. (78)
In his eagerness to make money from trees,he has cut them down in large numbers , only to find that without them he has lost the best friends he had.
And besides, 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 more serious: for where there are trees, their roots break up soil—allowing the rain to sink in—and also bind the soil, thus preventing 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-soil. When all the top-soil is gone, nothing remains but worthless desert.
Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It set up the empire but, without its trees, its soil became poor and it grew weak. When the empire fell to pieces; the home country found itself faced with floods and starvation. [br] Why do forests in many parts of the world slowly disappear?
选项
A、New trees are not looked after properly.
B、Many trees have been cut down by man.
C、Man has not paid enough attention to planting trees.
D、All of the above.
答案
D
解析
第二段说明了森林逐渐减少的原因,可知D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3373442.html
相关试题推荐
[originaltext]Here’ssomeinformationthatmightproveusefuldowntheroad
[originaltext]Fromtheancienttimes,marriagehasbeenanimportantpartof
[originaltext]Fromtheancienttimes,marriagehasbeenanimportantpartof
[originaltext]Fromtheancienttimes,marriagehasbeenanimportantpartof
[originaltext]Foreignaidisanimportantpartofinternationaleffortstoredu
[originaltext]Foreignaidisanimportantpartofinternationaleffortstoredu
[originaltext]Fromtheancienttimes,marriagehasbeenanimportantparto
[originaltext]Fromtheancienttimes,marriagehasbeenanimportantparto
[originaltext]Fromtheancienttimes,marriagehasbeenanimportantparto
[originaltext](16)Foreignaidisanimportantpartofinternationaleffort
随机试题
“一定”中的“一”应读()A.阴平 B.阳平 C.上声 D.去声
信用风险监管的方法有()。A.完善资产质量管理 B.加强重点领域信用风险防
吉兰-巴雷综合征脑脊液的特点是A.蛋白高,细胞数正常 B.蛋白正常,细胞数增高
教师如何在教学中训练学生的学习策略?
胫骨中1/3骨折易导致 A.血管损伤B.神经损伤C.骨折延迟愈合D.骨筋
( )旨在确保商业银行在设定的严重流动性压力情景下,能够保持充足的、无变现障碍的
ADF检验可以用来检验含有高阶序列相关的序列是否平稳性问题。()
阴亏血虚者应慎用的药是A.止血药 B.消食药 C.退虚热药 D.祛风湿药
表情淡漠,精神呆滞,哭笑无常,属于A.假神 B.得神 C.有神 D.无神
下列论述哪一项是错误的A.咀嚼力是咀嚼肌所能发挥的最大力 B.力是咀嚼时牙齿实
最新回复
(
0
)