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
85
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、All the time.
B、For most of the year.
C、In the summer months.
D、For a minimum of six months of each year.
答案
D
解析
事实细节题 。蜘蛛至少有半年的时间忙于消灭害虫,即D项“每年至少有六个月的时间”。
转载请注明原文地址:https://tihaiku.com/zcyy/2996481.html
相关试题推荐
[originaltext]Tobesuccessfulinajobinterview,youshoulddemonstratec
[originaltext]ForalongtimeDr.Jacksonhadwantedtogetapermanentjob
[originaltext]Theactofjoggingdoesn’trequireanyspecialskill.Youdo
Theproposalthat____________(商店星期日也应该营业引起了激烈的争论).shopsshouldopenonSundays
[originaltext]SomestudentsattheOpenUniversityleftschool20yearsago
[originaltext]SomestudentsattheOpenUniversityleftschool20yearsago
[originaltext]Aboutahundredyearsago,thepeopleofLondonwereamazedt
[originaltext]Aboutahundredyearsago,thepeopleofLondonwereamazedt
[originaltext]TheaverageAmericanwillmove13timesinhislifetimeandm
[originaltext]TheaverageAmericanwillmove13timesinhislifetimeandm
随机试题
Hekeptthrowingusanappleofdiscord,wesoonquarreledagain.A、(评判)不公B、(挑起)
TheFutureofPCMarketThefirstDevelopersConferen
Tattoosdidn’tspringupwiththedawnofbikergangsandrook’n’rollbands.
Peopletendtostrugglewhenlearninganotherlanguage,especiallyiftheya
We______anyattemptstoinfiltratecompanynetworkstoobtainuserinformation
砌体的线膨胀系数和收缩率与下列哪种因素有关?()A.砌体类别 B.砌体抗压
输送极度和高度危害介质以及可燃介质的管道,必须进行泄漏性试验。关于泄漏性试验正确
如右图所示,甲和乙在面积为54π的半圆形游泳池内游泳,他们分别从位置A和B同时出
2013年4月20日A公司向B公司签发一张金额为15000元的支票,B公司201
球阀是近年来发展最快的阀门品种之一,其主要特点为( )。A、密封性能好,但结构复
最新回复
(
0
)