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
2024-01-30
19
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
主旨大意题。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,因此本题正确选项为B。
转载请注明原文地址:https://tihaiku.com/zcyy/3407873.html
相关试题推荐
[originaltext]Scientistshavediscoveredaspeciesofsongbirdthatperforms
Aremarkablevarietyofinsectsliveinthisplanet.Morespeciesofinsects
Aremarkablevarietyofinsectsliveinthisplanet.Morespeciesofinsects
Aremarkablevarietyofinsectsliveinthisplanet.Morespeciesofinsects
Considerthis:manyofthetrulyremarkableinnovationsofthelatestgenera
CorporateAmbitions:Amazon,theWorld’sMostRemarkableFirm,IsJustGetti
CorporateAmbitions:Amazon,theWorld’sMostRemarkableFirm,IsJustGetti
CorporateAmbitions:Amazon,theWorld’sMostRemarkableFirm,IsJustGetti
CorporateAmbitions:Amazon,theWorld’sMostRemarkableFirm,IsJustGetti
CorporateAmbitions:Amazon,theWorld’sMostRemarkableFirm,IsJustGetti
随机试题
Insportthesexesareseparate.Womenandmendonotrunorswiminthesam
Manypeoplewonderwhysomemenwanttoliveonthemoon.Itis【C1】______not
答:5/16
戏剧的( )功能主要是通过戏剧所内含的思想来实现的。A.情节 B.教育 C
下列各项,不属于六淫共同致病特点的是( )。A.季节性 B.相兼性 C.外
下列各句中,没有语病的一句是:A.通州市五部门联合执法,取缔了多处非法经营的音像
以下关于集体合同的说法不正确的是()A:集体合同规定了企业的最低劳动标准 B:
2002年10月,国内首个IT系统外包大单签订:高阳数据中心与深圳发展银行就提供
在油气开采项目的施工期,土建工程的生态保护应重点关注( )。A.动物栖息地破坏
当初步设计达到一定深度,建筑结构比较明确时,编制单位建筑工程概算可以采用方法是(
最新回复
(
0
)