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
33
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.afterB.stormC.entitledD.illegalE.exaggerateF.beforeG.thunderH.interpretationI.agreedJ.qualifiedK.
A.probablyB.plantC.reasoningD.abilityE.stageF.speciesG.mammalH.differI.prehistoricJ.periodK.contact
OfferingHelpWriteanoteofabout50-60wordsbasedonthefollowingsituation:YourroommateKenismovingtoanother
InternationalDiningEtiquette1.AsiaRulesofusingchopsticksRestthemonaplateora【T1】______Avoidtorestthem【T2】_____
Thechancesofarepetitionoftheseunfortunateeventsare______indeed.
Nowadaysmanypeoplearekeenontakingexamsforallkindsofcertificates.Someofthemdothistogetsomeadvantagesinthei
TipsforPlanningaPresentationI.TheculturalstyleofpresentationforEnglishspeakers-A【T1】________withonemaini
(1)WhatstandsoutaboutHillaryClintonisherenormouscapacityforresiliencethathasallowedhertoeffectivelynavigatet
(1)Faster,cheaper,better—technologyisonefieldmanypeoplerelyupontoofferavisionofabrighterfuture.Butasthe202
随机试题
图中警察手势为直行信号。
男性,40岁。因风心,心力衰竭服地高辛治疗中,心电图检查为阵发性室上性心动过速伴2:1房室传导阻滞,心室率为100次/min。诊断为洋地黄过量。除停用洋地黄外,应选用哪种药物治疗
中国甲公司与某国乙公司发生买卖合同纠纷,在中国仲裁过程中,乙公司申请财产保全,即要求扣押甲公司在某港口的一批机器设备。仲裁委员会对此申请应如何处理?
钢筋原材料进场验验项目中,热轧圆盘条、热轧光圆钢筋、热轧带肋钢筋、余热处理钢筋的检验项目有外观检查、极限抗拉强度、()、伸长率、冷弯试验。
上海滨江、滨海资源十分丰富,整个海岸线长达180公里。()
贯彻新课程“以人为本”的教育理念首先应做到()。
爬行动物不是两栖动物,两栖动物都是卵生的,所以凡是卵生的动物都不是爬行动物。以下选项与题干推理形式相同的是()。
要在网络上发布彩色动画文件,可以采用的存储格式是______。
请在“答题”菜单中选择相应的命令,并按照题目要求完成下面的操作。注意:以下的文件必须保存在考生文件夹下。为了更好地控制教材编写的内容、质量和流程,小李负责起草了图书策划方案(请参考“图书策划方案.docx”文件)。他需要将图书策划方案Word文档中的内
FightinginNatureInnature,fightingissuchanever-presentprocessthatitsbehaviormechanismsandweaponsarehighlydevel
最新回复
(
0
)