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
2024-08-22
36
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.【T1】
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.
【T2】
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/3730730.html
相关试题推荐
Theworldisfullofwonderfulplaces,bothnaturalandman-made.EasterIsl
Theworldisfullofwonderfulplaces,bothnaturalandman-made.EasterIsl
Theworldisfullofwonderfulplaces,bothnaturalandman-made.EasterIsl
Theworldisfullofwonderfulplaces,bothnaturalandman-made.EasterIsl
Therearecockroaches(蟑螂)everywhereonEarthexcepttheplacesthatarecove
Therearecockroaches(蟑螂)everywhereonEarthexcepttheplacesthatarecove
Therearecockroaches(蟑螂)everywhereonEarthexcepttheplacesthatarecove
Therearecockroaches(蟑螂)everywhereonEarthexcepttheplacesthatarecove
Therearecockroaches(蟑螂)everywhereonEarthexcepttheplacesthatarecove
Therearecockroaches(蟑螂)everywhereonEarthexcepttheplacesthatarecove
随机试题
HowtoapproachReadingTestPartFive•ThispartoftheReadingTesttestsyou
"FamineThreatensMillions!"Headlinessuchasthisareunhappilyfrequent.
每月应对气压水罐的压力和有效容积等进行一次检测。
临床判断消化道出血完全停止的最可靠实验指标结果是A.粪镜检无红细胞 B.粪胆素
患者男性,75岁,突发意识丧失证实心脏骤停可根据 A.血压下降 B.瞳孔散大
阿桑是一位藏族学生,按照家里的民族风俗,阿桑每天早上要在屋内点上藏香,同寝室的汉
天王补心丹主治证是A.气虚血少,神志不安证 B.阴阳两虚,神志不安证 C.阳
在盐酸及氢氧化钠溶液中均易溶解的药物是A.氯霉素 B.诺氟沙星 C.乙胺丁醇
3月1日,甲公司将一台设备出售给乙公司,同日,乙公司以该设备抵押给甲公司担
表示资料频数分布可用A.普通线图 B.直方图 C.条图 D.百分比构成图
最新回复
(
0
)