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
2024-01-16
35
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 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 oh 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 does land become desert after all trees are cut down?
选项
A、Because nothing remains on land except floods.
B、Because there are no longer trees to keep the rain and protect the top-soil.
C、Because too much rain sinks in and washes away the top-soil.
D、Because roots of the trees break up the soil.
答案
B
解析
事实细节题。第二段最后一句话提到当顶屋土壤被冲走,就只剩下沙漠。而土被冲走是因为没有森林保存雨水,所以选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3366882.html
相关试题推荐
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
()I’mmistaken,I’veseenthatmanbefore.A、UnlessB、IfC、BecauseD、ProvidedA词
Inancienttimesthemostimportantexaminationswerespoken,notwritten.I
Inancienttimesthemostimportantexaminationswerespoken,notwritten.I
It’simportanttolocateindustriesinareaswhereasupplyofrawmaterialsis_
随机试题
Althoughcreditcardsarebecomingamore【B1】______partofthefinancials
Scientistssaytheyhavehighhopesforadrugthatcouldonedayprovidean
【B1】[br]【B3】A、constantB、regularC、lastingD、normalC词义辨析题。regular意为“定期的,有规律的”
14岁女孩,发热半个月,体温38~39℃,双手指指关节和掌指关节肿痛伴活动受限,
下列融资需求当中,既有可能通过短期融资实现,又有可能通过长期融资实现的有()。
A.饭前服 B.睡前服 C.饭后服 D.大多宜空腹服 E.不定时服滋补药
左边给定的是纸盒的外表面,下面哪一项能由它折叠而成?
主题班会的主要形式有() A.主题报告会B.主题汇报会C.主题
既解表散热,又疏肝和胃的中成药是A.参苏片 B.小柴胡片 C.板蓝颗粒 D
对某项目进行风险概率估计时,由于没有有效的统计数据,也不能进行试验,则宜采用的概
最新回复
(
0
)