首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
What is the most important function of trees?
What is the most important function of trees?
admin
2016-03-05
66
问题
What is the most important function of trees?
Trees are useful to man in three very important ways: they supply 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. 2000 years ago a country cut down its trees to build warships to gain itself an empire. It gained the empire but, without its trees, its soil became hard and poor. Even if a government realizes the importance of adequate supply of trees, it is difficult for it to persuade the villager to see this. The villager wants wood to cook his food with; and he can earn money by producing charcoal or selling wood to the townsman. So, unless the government has a good control system, the forests will slowly disappear. 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, thus preventing its being washed away easily; but where there are no trees, the rain falls on hard ground and flows away from the surface, causing floods and carrying away with it the rich topsoil, in which crops grow so well.
选项
A、The three benefits brought by trees.
B、Trees and soil conservation.
C、The various uses of trees.
D、The attitude of the government towards trees.
答案
B
解析
主旨题。文章开篇介绍了树木的3种好处,然后就其中第3个好处展开描述,即保护土壤方面的作用,故选B项。
转载请注明原文地址:https://kaotiyun.com/show/iiWK777K
0
专业英语四级
相关试题推荐
Accordingtothereport,mostpeoplereleasedwere
WhatwasthecauseofthestampedeataHindufestival?
Whydidn’tchildrengotoschoolalongtimeago?
WhatwasthereasonforthelatestclusterofdeathsinIndonesia?
WhichofthefollowingaboutthejournalistStephenFarrellisINCORRECT?
Whatisthispassagemainlyabout?
Whatwillthecollegestudentsdoforthehighschoolstudents?
ItcanbeinferredfromthepassagethatbeforetheIndustrialRevolution
Sincewearesocialbeings,thequalityofourlivesdependsinlargemeasureonourinterpersonalrelationships.Onestrengtho
随机试题
患儿,男,2个月。自出生后反复患病毒性肺炎,在新生儿期曾多次抽搐,目前又因鹅口疮来院诊疗。查体:眼距宽,人中短,两耳位置低,心前区3~4肋间可听到粗糙的全收缩期杂音。在下列检查中哪一项不会在此病患儿出现
简述《巴黎圣母院》中的爱斯梅哈尔达形象。
吻膝试验:
使胰蛋白酶原活化的最主要物质是
用于冲洗外伤伤口以预防厌氧菌感染的外用药是
根据《国家赔偿法》的规定,我国国家赔偿的费用由()负担。
甲的行为构成()。根据本案,对甲的量刑情节还有()。
某银行员工勤奋好学,经常向另一部门其他岗位的同事学习业务知识,在同事偶尔外出时还主动提出代为履行职责,这种行为()。
下列主张能够得到法律支持的是()。
下列关系模型中,能使经运算后得到的新关系中属性个数多于原来关系中属性个数的是
最新回复
(
0
)