首页
登录
职称英语
A remarkable variety of insects live in this planet More species of insects
A remarkable variety of insects live in this planet More species of insects
游客
2023-07-01
12
管理
问题
A remarkable variety of insects live in this planet More species of insects exist than all other animal species together. Insects have survived on earth for more than 300 million years, and may possess the ability to survive for millions more.
Insects can be found almost everywhere—on the highest mountains and on the bottom of rushing streams, in the cold South Pole and in bubbling hot springs. They dig through the ground, jump and sing in the trees, and run and dance in the air. They come in many different colors and various shapes. Insects are extremely useful to humans, pollinating(授粉)our crops as well as flowers in meadows, forests, deserts and other areas. But ticks and some insects, such as mosquitoes and fleas, can transmit disease.
There are many reasons why insects are so successful at surviving. Their amazing ability to adapt permits them to live in extreme ranges of temperatures and environments. The one place they have not yet been found to any major extent is in the open oceans. Insects can survive on a wide range of natural and artificial foods—paint, pepper, glue, books, grain, cotton, other insects, plants and animals. Because they are small, they can hide in tiny spaces.
A strong, hard but flexible shell covers their soft organs and is resistant to chemicals, water and physical impact. Their wings give them the option of flying away from dangerous situations or toward food or mates. Also, insects have an enormous reproductive capacity: An African ant queen can lay as many as 43,000 eggs a day.
Another reason for their success is the strategy of protective color. An insect may be right before our eyes, but nearly invisible because it is cleverly disguised like a green leaf, lump of brown soil, gray lichen(青苔), a seed or some other natural object. Some insects use bright, bold colors to send warning signals that they taste bad, sting or are poison Others have wing patterns that look like the eyes of a huge predator, confusing their enemies. Some insects also imitate bitter-tasting insects; hungry enemies are fooled into avoiding them. [br] The passage is mainly about _____.
选项
A、how insects survive in different places
B、why insects can survive so successfully
C、what insects can do to the environment
D、where insects can be found in quantity
答案
B
解析
本文前两段首先描述了昆虫生存了很长的时间,并能在各种地方生长,然后引出文章要讨论的重点,即昆虫为什么能成功存活。第3段第1句为本文的中心句,因此本题选B。
转载请注明原文地址:https://www.tihaiku.com/zcyy/2798551.html
相关试题推荐
Theownershipofpetsbringsavarietyofbenefitsthattheuninitiatedwoul
Theownershipofpetsbringsavarietyofbenefitsthattheuninitiatedwoul
Theownershipofpetsbringsavarietyofbenefitsthattheuninitiatedwoul
Comparativelyfewfresh-waterspeciesoffishesarelimitedintheirdistrib
Comparativelyfewfresh-waterspeciesoffishesarelimitedintheirdistrib
Comparativelyfewfresh-waterspeciesoffishesarelimitedintheirdistrib
Comparativelyfewfresh-waterspeciesoffishesarelimitedintheirdistrib
Corporationsasagroupofferavarietyofjobs.Mostlargecompaniessendp
Corporationsasagroupofferavarietyofjobs.Mostlargecompaniessendp
Corporationsasagroupofferavarietyofjobs.Mostlargecompaniessendp
随机试题
Talkaboutcreative【C1】______mechanismsforbeingalone,Japanappearstobe
WhatdoThomasJefferson’sidealizedfarmersmean?[originaltext]Whatwasth
[originaltext]Scientistshavelongthoughtabouttheideaofreplacingadi
企业梳理内部机构设置,应当重点关注内部机构设置的()等。A.合理性、合法性、时
(2018年)下列关于股利政策的表述中正确的有( )。A.固定股利政策有可能导
体现传统中国美术文化特有类型的是()。A.文人画 B.宗教美术 C
A.巯嘌呤 B.卡莫氟 C.塞替派 D.氮甲 E.卡莫司汀治疗膀胱癌的首
智商(IQ)等于()与()之比乘以100。
根据《建设项目环境影响评价技术导则总纲》,生态影响因素分析内容的重点为()
常用测量仪器中,主要功能是测量水平角和竖直角的仪器是( )。A.水准仪 B.
最新回复
(
0
)