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
2024-06-16
1
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 bas 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.
选项
A、Call on people to protect sharks.
B、Point out the living environment of sharks.
C、Explain why the sharks are dangerous.
D、An introduction to sharks.
答案
D
解析
What is this passage mainly about?
转载请注明原文地址:https://tihaiku.com/zcyy/3637114.html
相关试题推荐
[originaltext]M:Hello,mayIspeaktoMr.Hebert?W:Sorry,heisinameeting.
[originaltext]W:Excuseme.Haveyougotanybooksonliterature?M:Yes,they’re
[originaltext]W:WhendidyouarriveinNewYork?M:Iplannedtoarrivethereon
[originaltext]M:HowmuchdoIneedtopay?W:Letmesee.Err...fourdollars,an
[originaltext]M:Doyoufeellikegoingtothecinema? W:Oh,yes.Whatkindof
[originaltext]M:Doyoufeellikegoingtothecinema? W:Oh,yes.Whatkindof
[originaltext]W:Goodmorning,sir.CanIhelpyou?M:I’mlookingfor5or6cus
[originaltext]W:I’dliketotalktoMr.Smith.M:He’snotherebutMr.Blackis
[originaltext]W:Areyoureadytocheckout?M:Yes,youpaythebill,andI’llc
[originaltext]M:Ilikethegreencoat,butitcoststwiceasmuchasthatblueo
随机试题
Wemodernpeopleeatnotonlywhenwearehungrybutalsowhenweareinbadmoo
EdgarPoe,anAmericanwriter,wasbornin1809.Hisparentswereactors.Ed
各级文化行政部门、文化市场综合执法机构应当建立演出行业通气会制度,及时向本辖区演
氧化亚氮的MAC是()A.1.77 B.1.68 C.1.25 D.1
男性,42岁,间断头痛半年多,有时呕吐,伴双眼视力下降,查体发现双眼视乳头边缘模
下列哪项是化疗患者最常见和最严重的不良反应A.恶心、呕吐 B.造血功能障碍
根据联合国教科文组织制定的标准,下列哪个国家已经进入老龄化社会?()A.甲国6
变速车道形式中的(),容易识别,但行车状态欠佳,用于直行方向交通量较大时。
共用题干甲乙两国就海洋的划界一直存在争端,甲国在签署《联合国海洋法公约》时以书面
患者男,45岁。体检发现空腹血糖8mmol/L,餐后2小时血糖13mmol/L,
最新回复
(
0
)