首页
登录
职称英语
[originaltext] Why, you may wonder, should spiders be our friends? (26)Beca
[originaltext] Why, you may wonder, should spiders be our friends? (26)Beca
游客
2023-09-02
38
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 pitcll. (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
目的原因题 。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,后文提到蜘蛛不属于昆虫,可排除A 。
转载请注明原文地址:https://tihaiku.com/zcyy/2979504.html
相关试题推荐
[originaltext]Everyartistknowsinhisheartthatheissayingsomething
[originaltext]Everyartistknowsinhisheartthatheissayingsomething
[originaltext]MostAmericansbelievesomeoneisn’tgrownupuntilage26,
[originaltext]PeopleinPolandtaketheirpleasureseriously.Theyliketo
[originaltext]PeopleinPolandtaketheirpleasureseriously.Theyliketo
[originaltext]M:Well,you’veaskedaratherstrangepersonaprettystandardq
[originaltext]M:Well,you’veaskedaratherstrangepersonaprettystandardq
[originaltext]W:I’vejustfinishedreadingSteve’slistofwaysofmotivating
[originaltext]W:I’vejustfinishedreadingSteve’slistofwaysofmotivating
[originaltext]Oneofthemaincomplaintsofcityresidents,notsurprisingl
随机试题
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
WhatmadeonefirmofpublishersrefusetoacceptDominic’sfirstbook?[br][
ProductionPlannerWantedApplicants(应聘者)shouldbecollegeg
[originaltext]M:CouldyoupleaseexplaintheassignmentforMonday,MissSmith
缺铁性贫血和β珠蛋白合成障碍性贫血患者的RDWA.均缩小 B.前者多增大,后者
患者女性,65岁。无烟酒嗜好,拟行胆囊摘除+胆总管探查术。为进一步了解心脏功能下
阅读《浪之歌》教学实录(片段),完成下列题。 第二环节:个性阅读 (一)自主
在生活中出现摩擦、不快和委屈是常有的事,我们不能以针尖对麦芒,因为怨恨就像是一
某城市居民用水价格为:每户每月不超过5吨的部分按4元/吨收取;超过5吨不超过10
介水传染病的流行特点不包括( )。A.多为暴发流行 B.病例分布与供水范围一
最新回复
(
0
)