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 are cockroaches(蟑螂)everywhere on Earth except the places that are covered with ice. Scientists have discovered about 3 , 5
There are cockroaches(蟑螂)everywhere on Earth except the places that are covered with ice. Scientists have discovered about 3 , 5
admin
2014-01-10
80
问题
There are cockroaches(蟑螂)everywhere on Earth except the places that are 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 are 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.(69)
They are 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 prepared.
(70)
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.
Why should cockroaches be kept out of restaurants and other places where food is prepared?
选项
答案
Because most of the bacteria that cause food poisoning have been found in the stomachs of cock—roaches.
解析
(根据文章倒数第三段可知。)
转载请注明原文地址:https://kaotiyun.com/show/n4kK777K
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
A.unrelatedB.resultsfromC.takesD.fixedE.spendsF.distractedG.completelyH.productivityI.externalJ.with
A.incomeB.polarizationC.transformationsD.oldE.changesF.worseG.relaxedH.therebyI.divisionJ.accompanying
A.probablyB.plantC.reasoningD.abilityE.stageF.speciesG.mammalH.differI.prehistoricJ.periodK.contact
EveryyearmillionsofcandidatesattendtheNationalCivilServantExam,someofwhomevenregarditastheirlifelongcareeri
AdviceforStudents:HowtoTalktoProfessors1.Callthembytheright【T1】______【T1】______■"Professor"is
5WaystoJustEnjoyRetirement1.Thepurposeofthisspeech■Tohelpretireesfind【T1】______inretirement【T1】_
Sleep1.Howmuchsleepdoweneed■Recommendedamountforadults:【T1】______hours【T1】______2.Waysforabetterni
Itisrecommendedthattheproject______untilallthepreparationshavebeenmade.
WashingtonUniversityinSaintLouis,Missouri,isamedium-sizeduniversity.Ithaseleventhousandstudents.Twelvepercentof
LOOKONTHEBRIGHTSIDEDoyoueverwishyouweremoreoptimistic,someonewhoalways【16】ex______tobesuccessful?Havings
随机试题
当病人神志消失,诊断心跳停止的指标是
Itwasessentialthattheapplicationforms______backbeforethedeadline.
第一期乳腺癌患者,其癌肿直径不超过()
公式1一D×1×13中,为()。
工程施工合同履行过程中,建设单位迟延支付工程款,则施工单位要求建设单位承担违约责任的方式可以是( )。
按16×16点阵存放国标GB2312—80中一级汉字(共3755个)的汉字库,大约占存储空间()。
根据规定,股份有限公司不得收购本公司的股票,但特殊情形是允许的。该特殊情形是()。
某甲入室行窃,正在翻箱倒柜时,听到室主回家开门的声音,于是赶紧越窗逃跑。某甲的行为属于()。
教师资格应具备哪些条件?你对教师聘任制度是怎样理解的?
据最新统计,在需要同等学力的十个不同的职业中,教师的平均工资五年前排名第九位,而目前上升到第六位;另外,目前教师的平均工资是其他上述职业的平均工资的86%,而五年前只是55%。因此,勃师工资相对偏低状况有了很大的提高。上述论证基于以下哪项假设?I.近
最新回复
(
0
)