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
2025-03-11
26
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 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/3992388.html
相关试题推荐
IwillspendmoretimeonEnglish,______itispossible.A、sothatB、providedC、j
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______depen
随机试题
[originaltext]M:AreyougoingtoNewYorktonight?W:Well,I’mnotfeelingwe
Themostconvincingevidencefortheimportanceofadultinfluenceonachil
Thissectionmeasuresyourabilitytousewritingtocommunicateinanacade
IntroductiontoandRequirementsforPsychologyCourse1.CoursecontentInt
With2005fastbecoming"theyearofthenaturaldisaster",itistimetor
设,则du=()。
共用题干 孕妇,34岁,孕36<sup>+3</sup>周,头痛,视物不清1天
施工单位在施工阶段质量控制的工作包括()。A.材料、构配件检验和施工试验 B
财务预测的审查包括()。 A.成本、利润的审查B.销售收入审查 C.税金
男,26岁。急起血尿、少尿、水肿、高血压,肾功能急剧恶化。B超示双肾增大。肾活检
最新回复
(
0
)