首页
登录
职称英语
There are cockroaches(蟑螂)everywhere on Earth except the places that are cove
There are cockroaches(蟑螂)everywhere on Earth except the places that are cove
游客
2023-10-21
58
管理
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. [br] Why cockroaches are particularly dangerous in hospitals?
选项
答案
Cockroaches eat all kinds of hospital waste or get it on their bodies and then they carry thewaste on to food which is eaten by people in the hospital.
解析
(文章第四段最后两句解释了蟑螂在医院尤其危险的原因。)
转载请注明原文地址:https://tihaiku.com/zcyy/3116451.html
相关试题推荐
Boththefamilyandthesociety________exceptionalchildrenliveareoftenthe
AllthefollowingsentencesdefinitelyindicatefuturetimeEXCEPT________.A、Mot
[originaltext]W:Thetripwasprettygoodexceptfortheflattirewegotonth
[originaltext]W:Thetripwasprettygoodexceptfortheflattirewegotonth
[originaltext]W:Thetripwasprettygoodexceptfortheflattirewegotonth
[originaltext]W:Thetripwasprettygoodexceptfortheflattirewegotonth
Thefollowingareallincorrectresponsesto"Jackhasanewdictionary"EXCEPT_
Therewassnoweverywhere,sothattheshapeofthingswasdifficultto________.
AllthefollowingsentenceshaveanobjectclauseEXCEPT________.A、Idon’tknow
AllthefollowingsentenceshaveanappositiveEXCEPT________.A、Themanagerhims
随机试题
Couldamechanicaldeviceever______humanintelligence-theultimatetestbeing
Aboutonethousandstudentspassedtheentranceexaminationforpostgraduate,ma
MINUTESOFTHEMEETINGHELDINCONFERENCEROOMNO.
某活性炭有限公司是一家专业生产活性炭的民营企业,公司成立于2004年,主要销售模
上部结构地基及基础在传递荷载的过程中是相互独立互不影响的。
按照我国现行证券交易规则规定,上海证券交易所正常交易日连续竞价的时间为()。A:
下列哪些选项属于行政强制措施的特点?( )A.长久性 B.暂时性 C.保全
网络并非法外之地,让肆意妄为的网络“喷子”们________,需要全社会共同努力
根据现行国家标准《自动喷水灭火系统施工及验收规范》(GB50261)对自动喷水
(2017年真题)根据票据法律制度的规定,下列情形中,不构成票据质押的有(
最新回复
(
0
)