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
30
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
HorsemanshipReturnedA)Bridgeport,Calif.Themene
ShoppinghabitsintheUnitedStateshavechangedgreatlyinthelastquarte
2000年4月,()档案馆试办了全国首家文件档案资料服务中心。A.广东省深圳市
美是纯洁道德、丰富精神的重要源泉。下列关于美育的表述,错误的是( )。A.美育
如图4所示,玻璃管内封闭了一定质量的气体,气柱长度为ι,管内外水银面高度差为h。
注:1.农村金融机构包括农村商业银行、农村合作银行、农村信用社和新型农村
烙画古称“火针刺绣”,是一门传承千年的艺术。烙画以火为“墨”,用火烧热特制铁笔,
每张中成药处方可以开具的药品种类最多的是A.2种 B.3种 C.5种
下列要素中,属于麦肯锡公司提出的7s模型中软件要素的有()A.人员 B.制度
男,17岁,水肿1周,辅助检查:尿蛋白(+++),尿沉渣镜检:红细胞0~1/HP
最新回复
(
0
)