首页
登录
职称英语
[originaltext] Scientists say sharks have lived in the world’s oceans for mi
[originaltext] Scientists say sharks have lived in the world’s oceans for mi
游客
2023-08-29
45
管理
问题
Scientists say sharks have lived in the world’s oceans for millions of years. Scientists say there are more than 350 different kinds of sharks.
Sharks do not have bones, and a shark has an extremely good sense of smell. It can find small amounts of substances in the water, such as blood, body liquids and chemicals produced by animals. Sharks also sense electrical and magnetic power linked to nerves and muscles of living animals. These powerful senses help them find their food. Some sharks will eat just about anything. Many unusual things have been found in the stomachs of some tiger sharks. They include shoes, dogs, a cow’s foot and metal protective clothing.
About forty percent of the different kinds of sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies like humans do.
Scientists are beginning to understand the importance of sharks to humans. Medical researchers want to learn more about the shark’s body defense system against disease. They know that sharks recover quickly from injuries. Sharks appear never to suffer infections, cancer or heart diseases.
Questions:
29. What is this passage mainly about?
30. How can sharks find their quarries?
31. In which point some sharks are similar with humans?
32. Why are sharks useful for humans?
选项
A、Their tasty meat.
B、The principle of their defense system against disease.
C、Their solid skin.
D、The principle of their birth modes.
答案
B
解析
细节题。鲨鱼对人类的用处出现在文章第四段.根据句子:Medical researchers want to learn more about the shark’s body defense system against disease.(对鲨鱼身体的疾病预防系统的研究可以对人类有帮助。)答案是B。
转载请注明原文地址:https://tihaiku.com/zcyy/2967872.html
相关试题推荐
[originaltext]Pullingheavysuitcasesalldayinthesummerishardwork,e
[originaltext]Pullingheavysuitcasesalldayinthesummerishardwork,e
[originaltext]Pullingheavysuitcasesalldayinthesummerishardwork,e
[originaltext]Nobodycaneverknowwhomadethefirstdoll.Perhapsaprehi
[originaltext]Nobodycaneverknowwhomadethefirstdoll.Perhapsaprehi
[originaltext]Oneofthefirstquestionsanybodyasksaboutanew-bornis"
[originaltext]M:Hi,Helen,whatdoyouthinkofourclassinchildren’slitera
[originaltext]M:Hi,Helen,whatdoyouthinkofourclassinchildren’slitera
[originaltext]W:Mr.Wang,itisreportedthatyouruniversityisthefirstone
[originaltext]W:It’samiraclethatRobertcameoutoftheaircrashalive.M:
随机试题
Butthosewhodoteachpoetrymustkeepinmindafewthingsaboutitsessential
Atwork,asinlife,attractivewomengetalotofthebreaks.Studieshave
国家电网有限公司“十三五”企业文化建设的保障措施是:坚持党的领导,充分发挥党组织
下列关于协奏曲说法不正确的是。( )A.协奏曲由一种独奏乐器和管弦乐队组成的一
根据《道路客货运输驾驶员行车操作规范》规定,及时降低车速,行驶速度不超过30km
下列有关沥青针入度试验说法正确的是() A.针入度指数采用的温度有5℃、1
正常标准成本从数额上看,它应当大于理想标准成本。()
变压器强油循环结构的潜油泵启动应逐台启用,延时间隔应在(____)以上,以防止气
向人民法院申请保护债权的诉讼时效期间通常为()年。A.1 B.3 C.
电磁波测距仪所采用的载波不包括()。A.超声波 B.电磁微波 C.激光
最新回复
(
0
)