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
81
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.incomeB.polarizationC.transformationsD.oldE.changesF.worseG.relaxedH.therebyI.divisionJ.accompanying
A.afterB.stormC.entitledD.illegalE.exaggerateF.beforeG.thunderH.interpretationI.agreedJ.qualifiedK.
A.probablyB.plantC.reasoningD.abilityE.stageF.speciesG.mammalH.differI.prehistoricJ.periodK.contact
A.probablyB.plantC.reasoningD.abilityE.stageF.speciesG.mammalH.differI.prehistoricJ.periodK.contact
TheImportanceofGoodSleepMillionsofadults,especiallyyoungpeople,donotgetenoughsleepandmanysufferfromlack
Sleep1.Howmuchsleepdoweneed■Recommendedamountforadults:【T1】______hours【T1】______2.Waysforabetterni
Theonlycandidate_______canhopetodefeathimfinallyquits.
Goodmorning,everyoneandwelcometotheEnglishforAcademicPurposesCenter.I’dliketobeginbybriefly【D1】______theservi
A、Adviceforfamilylife.B、Advicefordatingstuff.C、Adviceforeverydaylife.D、AdviceforChristmasgifts.B根据原文可知,网站绝大多数作者和
OfthetwoT-shirts,Ichose______.
随机试题
下述使影像产生运动模糊的因素是
以下关于口腔白斑病恶变倾向说法不正确的是
治疗消化不良的用药注意事项与患者教育有()。
下列施工环节中,属于水运工程重大事故隐患清单中的施工环节有()。
根据规定,用人单位可以解除劳动合同的是( )。
积极成长型投资者可以承受投资的短期波动,愿意承担因获得高报酬而面临的高风险。()
根据外商投资企业法律制度的规定,外商投资企业的投资项目分为鼓励、允许、限制和禁止四类。下列各项中,属于鼓励类外商投资项目的有()。
关于无差异曲线特征的说法,正确的有()。
俄国农奴制改革的根本原因是()。
Weweretoldthatweshouldfollowthemainroad______wereachedthecentralrailwaystation.
最新回复
(
0
)