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
82
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.exceptionB.ultimatelyC.embarrassD.conceptsE.toleranceF.oppressG.targetH.adaptableI.stressedJ.temporaril
A.unrelatedB.resultsfromC.takesD.fixedE.spendsF.distractedG.completelyH.productivityI.externalJ.with
A.afterB.stormC.entitledD.illegalE.exaggerateF.beforeG.thunderH.interpretationI.agreedJ.qualifiedK.
AdviceforStudents:HowtoTalktoProfessors1.Callthembytheright【T1】______【T1】______■"Professor"is
WhatBackpackingBeginnersShouldKnow?1.【T1】______beforebackpacking【T1】______■Breakinnewhikingsho
HowtoTakeLectureNotes1.Whatiseffectivenote-taking?■To【T1】______thematerialandwritedownkeyelements【T1】_
Youaregettingtoooldforfootball.You’dbettertake_____golfinstead.
ReptilesatRiskAresearchmadeinconjunctionwith200speciesconservationexpertshasfound/thefutureof19%ofth
(1)Oneofourmostfirmlyentrenchedideasofmasculinityisthatarealmandoesn’tcry.Althoughhemightshedadiscreettea
PassageSixWhywastheauthornotallowedtocallherfriends?
随机试题
《诸病源候论》是我国第一部论述病源和证候诊断的巨著,此书的作者是()(1995年第14题)
工业化是推进城镇化的重要支撑,而城镇化必然要依靠相关产业的支持。没有工业化的进一步发展,城镇化就失去了最坚强的后盾。由此可以推出()。
仲裁型质量监督包括【】
“百团大战”的重要意义是()
细胞内ATP/AMP比值增加可以抑制
癌细胞多形性是下列哪项的标志
护理急性感染性多发性神经炎病人应防止何种并发症的发生以免危及生命
下列各项中,符合会计要素收入定义的是()。
以下地址中不属于网络100.10.96.0/20的主机地址是()。
下列选项中,关于交换机的描述不正确的是()。
最新回复
(
0
)