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
13
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、They would have eight legs.
B、They would have six legs.
C、They would be able to fly.
D、They would not destroy their own kind.
答案
B
解析
推理判断题 。蜘蛛不是昆虫,因为蜘蛛有八条腿,而昆虫只有六条(never more than)。所以如果蜘蛛是昆虫的话,它们将只能有六条腿。
转载请注明原文地址:https://www.tihaiku.com/zcyy/2996480.html
相关试题推荐
[originaltext]Tobesuccessfulinajobinterview,youshoulddemonstratec
[originaltext]ForalongtimeDr.Jacksonhadwantedtogetapermanentjob
[originaltext]Theactofjoggingdoesn’trequireanyspecialskill.Youdo
[originaltext]SomestudentsattheOpenUniversityleftschool20yearsago
[originaltext]SomestudentsattheOpenUniversityleftschool20yearsago
[originaltext]Aboutahundredyearsago,thepeopleofLondonwereamazedt
[originaltext]Aboutahundredyearsago,thepeopleofLondonwereamazedt
[originaltext]TheaverageAmericanwillmove13timesinhislifetimeandm
[originaltext]TheaverageAmericanwillmove13timesinhislifetimeandm
[originaltext]TheaverageAmericanwillmove13timesinhislifetimeandm
随机试题
关于水稻,下列说法错误的是()。A.水稻是目前全球产量最大的粮食作物 B.我
对
智齿冠周炎引起"牙关紧闭"的原因是A.炎症侵及咀嚼肌 B.疼痛 C.TMD
患者男,23岁。打篮球时扭伤右膝关节,伤后感右膝关节疼痛、肿胀,经过休息和理疗后
经产妇停经36周,右肩前位,胎膜已破,胎心消失24小时,肛诊:宫口开全,无先兆子
在社区老年人外出活动结束后,社会工作者小林设计了一份调查问卷,旨在了解社区老年人
从员工档案中可以了解到员工( )等方面的信息。A.技能水平 B.工作业绩
小张(15岁)的父亲经常在家吸烟,小张也常模仿吸几口,父亲未加制止,小张父亲的做
下列进口消费品中,需要在进口环节纳税的是()。A、钻石饰品 B、金首饰 C、
下列期货种类中,属于金融期货的是() A.利率期货B.金融期货
最新回复
(
0
)