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
2024-05-12
50
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:http://tihaiku.com/zcyy/3595770.html
相关试题推荐
He______(不应该让我们等了那么长时间)fornoreasonatall,whichisquiteimpolite.shouldn’
[originaltext]Oneofthebiggestchallengesfacingemployersandeducators
[originaltext]Oneofthebiggestchallengesfacingemployersandeducators
[originaltext]Agoodmarriagemeansgrowingasacouplebutalsogrowinga
[originaltext]Agoodmarriagemeansgrowingasacouplebutalsogrowinga
[originaltext]M:Tellusabitaboutthekindofconsumerthatyou’regoingto
[originaltext]M:Tellusabitaboutthekindofconsumerthatyou’regoingto
[originaltext]M:Hi,Kate.MindifIjoinyou?W:No,notatall,haveaseat,
[originaltext]M:Icouldn’tputupwithmywifeanylonger.Idon’tknowwhysh
[originaltext]M:Icouldn’tputupwithmywifeanylonger.Idon’tknowwhysh
随机试题
TASKONE—PROBLEMS•Forquestions13—17,matchtheextractswiththeproblems,li
Whyaresleddogssaidtobephysicalwonders?[br]Whensleddogsgetsufficien
[originaltext]GailArmandandRobertVanSluishadaplanfortheirretirem
患者女性,30岁,面部水肿,疲倦、乏力半个月,双侧面颊和鼻梁部有蝶形红斑。实验室
辅助设施检修策略中,要求发生烟温报警装置手动火灾报警按钮红色报警灯不闪烁时,检查
恒大建设单位拟建一个大型的建筑工程,现已获得国家批准。公司在进行可行性研究时,通
《关于加强社会工作专业人才队伍建设的意见》提出要积极开展社会工作专业人才队伍职业
对风湿病人造成最严重危害的病变是( )。A.关节病变 B.心包内纤维蛋白性炎
()通过计算同一张财务报表的不同项目之间、不同类别科目的比率,或计算两张不
建设项目总概算是由()汇总编制而成。A、单位工程概算 B、各单项工程概算
最新回复
(
0
)