首页
登录
职称英语
[originaltext] Why, you may wonder, should spiders be our friends? (26) Be
[originaltext] Why, you may wonder, should spiders be our friends? (26) Be
游客
2023-09-08
45
管理
问题
Why, you may wonder, should spiders be our friends? (26) Because they destroy so many insects, and insects include some of the greatest enemies of the human race. Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals. (27) We owe a lot to the birds and beasts which eat insects but all of them put together kill only a fraction of the number destroyed by spiders. Moreover, unlike some of the other insect eaters, (26) spiders never do the harm to us or our belongings.
Spiders are not insects, as many people think, nor even nearly related to them. One can tell the difference almost at a glance, (28) for a spider always has eight legs and insect never more than six.
How many spiders are engaged in this work in our behalf? One authority on spiders made a census of the spiders in grass field in the south of England, and he estimated that there were more than 2 250 000 in one acre; that is something like 6 000 000 spiders of different kinds on a football pitch. (29) Spiders are busy for at least half the year in killing insects. It is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures, not content with only three meals a day. It has been estimated that the weight of all the insects destroyed by spiders in Britain in one year would be greater than the total weight of all the human beings in the country.
选项
A、Because they are beneficial insects.
B、Because they destroy insects without hurting us in any way.
C、Because they protect insect-eating animals.
D、Because they include some of the greatest enemies of the human race.
答案
B
解析
综合理解题 。蜘蛛可以帮助人类消灭一些害虫。并且不会对人类造成危害。同时,第二段提到蜘蛛不属于昆虫,可排除A项。
转载请注明原文地址:https://tihaiku.com/zcyy/2996478.html
相关试题推荐
[originaltext]WeknowthenthatintheUS,it’sthejobofCongresstoprop
[originaltext]WeknowthenthatintheUS,it’sthejobofCongresstoprop
[originaltext]WeknowthenthatintheUS,it’sthejobofCongresstoprop
[originaltext]Alotofpeoplethinkthatculturalanthropologyisjustabo
[originaltext]Lastweek,yourecall,wediscussedtheearlydevelopmentof
[originaltext]Lastweek,yourecall,wediscussedtheearlydevelopmentof
[originaltext]W:OK.Mr.Taylor,let’sgoaheadandbegin.Firstofall.tellm
[originaltext]W:OK.Mr.Taylor,let’sgoaheadandbegin.Firstofall.tellm
[originaltext]M:Howisschoolgoing,Barbara?Areyoutakinganynewclasses?
[originaltext]M:HowdidSallygowithherpresentationlastnight?W:Nosoone
随机试题
注销注册商标的途径有()。A.有效期截止 B.依申请注销 C.侵权注销
A.1.8~3.0mg/L B.50mg/L C.100mg/L D.50
骨与关节结核最常发生的部位是A.膝关节 B.髋关节 C.肘关节 D.腕关节
有一段环形路如图所示,每条边均为10米,甲乙两人分别从A、B两点同时出发,沿着路
某苯胺生产企业对技术改造问题进行经济可行性分析。目前企业投产的两条生产线每年生产
对期货投资者的保证金损失,保障基金按照下列原则予以补偿,包括()A.对每位个人
市场集中度与市场中( )的形成密切相关,可以用来作为考察市场结构的首要因素。
与股份制金融机构比较,信用合作社的特点有( )。A.基层社员为合作社最终所有者
A公司是一家零售商,正在编制2020年5月份的预算,有关资料如下: (1)
下列关于标准成本的说法中,不正确的是()。A.理想标准成本指在现有条件下所能达到
最新回复
(
0
)