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
63
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. In his eagerness to make money from trees, he has cut them down in large numbers, only to find mat 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
事实细节题。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/3372481.html
相关试题推荐
[originaltext] Thewaytocomplainistoactbusinesslikeandimportant.(20)
[originaltext] Thewaytocomplainistoactbusinesslikeandimportant.(20)
[originaltext] (3)TheUnitedStatessaysitwillprovideanadditional180mi
[originaltext] Chickenfeathersareuseful,andnotjusttoachicken.Somego
[originaltext] Chickenfeathersareuseful,andnotjusttoachicken.Somego
[originaltext] Literatureprovidesalensthroughwhichreaderslookatthewo
[originaltext] Peanutsareanimportantcropinmanydevelopingcountries.But
[originaltext] Peanutsareanimportantcropinmanydevelopingcountries.But
[originaltext]Thewaytocomplainistoactbusiness-likeandimportantIf
[originaltext]Thewaytocomplainistoactbusiness-likeandimportantIf
随机试题
Tryand______yourtentonlevelground.A、pitchB、establishC、installD、fixA动词形异
ARP协议数据单元封装在()中传送。A.IP分组 B.以太帧 C.TC
26岁初产妇,妊娠42周,规律宫缩10小时。检查胎儿较大估计体重3000g,枕左
公司型基金中,( )投资者需承担双重征税。A.公司型 B.事业单位型 C.
Thechangeinthatvillagewasmiraculou
课程、教科书、教学参考书等属于教育基本要素的()。A.教育者 B.受教育者
下列对泡沫灭火系统泡沫液的选择和储存说法,正确的是()。A.当采用液上喷射系统
2020年末,全国共有从表演场馆2770个,比上年末增加54个;观众坐席数
如果若干个非平稳变量之间存在协整关系,这些变量必有误差修正模型表达式存在。(
甲氨蝶呤的迟发毒性为()。A.骨髓功能抑制 B.口腔及胃肠溃疡 C.小
最新回复
(
0
)