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 ,50
There are cockroaches(蟑螂)everywhere on Earth except the places that are covered with ice. Scientists have discovered about 3 ,50
admin
2018-10-19
14
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. 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.
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 a-void 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.
Questions 66—70
Answer the following questions according to the passage.
How cockroaches "see"?
选项
答案
They“see”with the hairs on their bodies.
解析
(文章第二段第二句即答案。)
转载请注明原文地址:https://kaotiyun.com/show/pQjK777K
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
Theideaoftravelingthrough_______spacetootherplanetsinterestsmanypeopletoday.
______stormswreakedhavoconthearea,leavingthreepeopledeadanddozensinjured.
Chinesepeoplehad______8years’warwithJapanandfinallywonthewar.
EngagementsTheperiodofengagementisthetimebetweenthemarriageproposalandtheweddingceremony./Twopeopleagr
SocialNetworkingSocialnetworkingandblogshavenowbecomemorepopularthansendingpersonalemails./Theideabehin
EducationalTechnologySchoolsarealmostallconnectedtotheInternet./Butsomehavemoretechnology,anduseitmore
Nowadays,withthegrowingpopularityofcomputers,moreandmorepeoplearepayinglessandlessattentiontotheirhandwriting
Computerisaveryusefultooltous.Butsomeexpertssayusingacomputereverydaycanhavemorenegativethanpositiveeffec
Themethodofwritingcalled"streamofconsciousness"isusedtodescribethe________ofthoughtspassingthroughthemind.
RareamongAmericanactors,DepphasmadeanameforhimselfeffortlesslyswitchingbetweenmainstreamHollywoodmoviesandmore
随机试题
下列哪种情况不是骨关节结核病灶清除术的适应证
WHO龋病流行程度评价的标准是
患者,男,57岁。头痛而眩,心烦易怒,夜眠不宁,胁肋疼痛,面红口苦,舌边红苔薄黄,脉弦有力。问题3:(假设信息)若病情进一步发展,突发半身不遂,面白唇暗,四肢不温,痰涎壅盛,而后转入昏迷,脉沉滑。治疗应首选
流行病学统计,女性发病多于男性的有
[背景材料]某投资公司建造一幢办公楼,采用公开招标方式选择施工单位。招标文件要求:提交投标文件和投标保证金的截止时间为2008年5月30日。该投资公司于2008年3月6日发出招标公告,共有5家建筑施工单位参加了投标。第5家施工早位于2008年6月2
根据支付结算法律制度的规定,商业汇票的付款期限,自汇票出票之日起,最长不得超过()。
根据个人所得税法律制度的规定,对一次劳务报酬收入畸高的应实行加成征收,所谓“一次性劳务报酬收入畸高”是指()。
学生容易受到外部环境因素的影响,具有“染于苍则苍,染于黄则黄”的特点,这主要体现了学生具有()。
AnyAmericanwhohasboughtapackofcigarettessincethemid-’60smighthaveseenthehealthwarnings.Itsays,"SURGEONGENER
Ihaven’tseenMarythesepastfewdays.I’mafraidshe______herselfforsometime.
最新回复
(
0
)