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
41
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
[originaltext]M:I’mgoingtotalktoyounowaboutthesuffragettemovement.W
简述艺术表现及其过程。
气体灭火系统的驱动装置分为气动型驱动器,电爆型驱动器,电磁型驱动器,机械型驱动器
新闻与历史在表现手法上的共同点是()A.时新性和知新性的统一 B.纪实性和选择
以下关于磁盘的描述中,不正确的是()。A.同一个磁盘上每个磁道的位密度都是相
A.过敏性紫癜 B.单纯性紫癜 C.血友病 D.原发性血小板减少性紫癜
合同要素拟定法的特点包括()。A、以合同要素作为合同各条款设定的依据B、以合同
不符合急性细菌性心内膜炎的是()A.瓣膜赘生物体积大、污秽、易脱落 B.常
下列属于存款业务的基本法律要求有()。 A.未经银行业监督管理机构批准,任何
某线路采用双地线,导线采用双分裂LGJ—400/35钢芯铝绞线,为解决系统通信问
最新回复
(
0
)