首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
There axe cockroaches(蟑螂)everywhere on Earth except the places that axe covered with ice. Scientists have discovered about 3,500
There axe cockroaches(蟑螂)everywhere on Earth except the places that axe covered with ice. Scientists have discovered about 3,500
admin
2010-02-20
35
问题
There axe cockroaches(蟑螂)everywhere on Earth except the places that axe covered with ice. Scientists have discovered about 3,500 different species of cockroach. There is just one human species! Cockroaches can be anything in size from about five mm to nine cm. Although five mm is very small, nine cm is as long as a large rat.
It is very difficult to catch most cockroaches. They "see" with the hairs on their bodies. These hairs can feel the smallest movement in the air, so the cockroaches know immediately something moves, and run to safety.
Of all the species of cockroach, fortunately only three live among humans and axe a serious problem. They are the German, the Oriental, and the American. One egg case of the German cockroach can produce as many as seven million cockroaches in 12 months!
Our main problem with cockroaches is that not only do they look ugly to us, but they also carry diseases. They axe particularly dangerous in hospitals as they eat all kinds of hospital waste or get it on their bodies. They can then carry this waste, which may contain dangerous bacteria, on to food which is then eaten by people in the hospital.
Most of the bacteria that cause food poisoning have been found in the stomachs of cockroaches, so it is important that cockroaches should be kept out of restaurants and other places where food is pre pared.
Many people work and try to destroy cockroaches, but as soon as they find one way of doing it, the cockroaches "learn" how to deal with it. Electricity does not always kill them and they can avoid most poisons or "learn" how to deal with others. At one time, scientists thought that radiation would kill them, but they have been on Earth for about 300 million years, and it does not harm them as much as it does us.
It seems probable that when there are no longer human beings living on the Earth, cockroaches will still be here.
选项
答案
they can feel or sense their movements (in the air)
解析
细节题。作者在文章第二段中指出:蟑螂可以用它身上的须“看见”或感觉到空气中最细微的运动,只要有动静,它就会迅速逃到安全的地方,所以很难抓住它。
转载请注明原文地址:https://kaotiyun.com/show/jvt7777K
0
大学英语四级
相关试题推荐
______________(一个接一个),speakerscalledfortheliberationoftheoppressedpeopleoftheworld.
Whenwetellothersinformation,wealsoexpressourfeelingsatthesametime.Adwritersalwaysuseboldorlargelettersin
A、UnitedStates-Canadianagreements.B、Unlimitedgrowthinpopulation.C、PollutionintheGreatLakes.D、Thelimitedsupplyofp
Scientiststhinkthemoralists’warningis______.Thephrase"becaughtwithpantsdown"inthefirstparagraphprobablymeans
A、$5.B、$5.60C、$4.40D、$6.60BW:Ithoughtthatthesetypewriterribbonscost5dollars.M:Theyusedto,butthepricehasgon
ThepassageismainlyaboutthepovertyofthewholeAfricawhichisinslowdevelopment.TheleadinginvestoronAfricaninfra
A、50%.B、20%.C、30%.D、Allofit.CHowmuchmoneydoesMollysaveeverymonth?此题考查听特定信息即听数字的能力。解题的关键点在于抓住“Ialwaystake30%of
A、Hermother.B、Anactress.C、Herroommate.D、Herclassmate.DWhowillthewomanaskaboutthebook?此题考查听特定信息的能力,而且所听即所得。对应答案句a
A、Bossandjobhunter.B、Clerkandcustomer.C、Managerandwaiter.D、Waiterandcustomer.A根据选项,推测提问将会涉及对话双方的关系。从句子“Haveyouany
A、Courteousandintellectual.B、Politeandmasculine.C、Braveandintelligent.D、Considerateandromantic.D此题涉及词汇的理解。文中提到“alar
随机试题
下列关于喹诺酮类药物使用方法的描述,正确的是()。
系统审计
胸外心脏按压的部位是()
30岁,月经4—5天/24—25天,习惯性流产3次,基础体温呈双相。高温相持续8—10天。应诊断为
下列哪味药既能活血又能行气
工程勘察的最后结果是( )。
下列关于水幕系统的描述中,错误的是()。
假定甲、乙两只股票最近3年收益率的有关资料如下表2.5:市场组合的收益率为12%,无风险收益率为5%,假设市场达到均衡。要求:(1)计算甲、乙两只股票的预期收益率;(2)计算甲、乙两只股票收益率的标准差;(3)计算
下面是关于AMBA(AdvancedMicrocontrollerBusArchitecture)的叙述:I.AMBA有助于开发带有大量控制器和外设的多处理器系统Ⅱ.AMBA规定了ARM处理器内核与处理芯片中快速组件的接口标准Ⅲ.A
下列数据模型中,具有坚实理论基础的是______。
最新回复
(
0
)