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
2024-06-03
52
管理
问题
Scientists say sharks have lived in the world’s oceans for millions of years. Scientists say there are more than three- hundred –fifty 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.
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
本文是围绕着鲨鱼的生活习性展开。A,C与本文无关,B只指出了一方面。
转载请注明原文地址:http://tihaiku.com/zcyy/3618127.html
相关试题推荐
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
[originaltext]Ifyou’vebeenoncampusforverylong,I’mcertainthatyou’
[originaltext]Ifyou’vebeenoncampusforverylong,I’mcertainthatyou’
[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt
[originaltext]F:HeyKirk,weaxegettingawayfortheweekendtogocanoeing.
[originaltext]F:HeyKirk,weaxegettingawayfortheweekendtogocanoeing.
[originaltext]F:HeyKirk,weaxegettingawayfortheweekendtogocanoeing.
[originaltext]M:Excuseme.Iwonderifyoucouldhelpme.Thereferencelibrar
[originaltext]M:Excuseme.Iwonderifyoucouldhelpme.Thereferencelibrar
[originaltext]M:You’reawonderfulcook,Anna.Everythingissogood.W:Glad
随机试题
PassageTwoSoothe.由题干关键词定位到第七段,第七段末句指出,法院首先可能不会将责任归咎到你身上,而这或许能帮助“assuage”一些痛苦但不能
[originaltext]M:MayIcomein?W:Yes,ofcourse.M:Hello,Kate.WhereisJan
女性,65岁,咳嗽、咳痰伴喘息30余年,加重1周,痰白色,量较多,2天来高热、嗜
幼儿进入小学后的主要任务是学习,因此幼儿没必要学习生活自理( )
心理的源泉和内容是(),心理的器官是() A、客观现实B、人脑
以下有关丸剂的叙述,哪一项是错误的A.适用范围广 B.制法简便 C.可
独立避雷针导通电阻低于500mΩ时应进行校核测试。其他部分导通电阻大于50mΩ时
某人购买一套建筑面积120平方米,套内建筑面积100平方米,套内建筑面积单价50
劳动标准法包括()。A.正员标准法 B.工作时间法 C.职业标准法
下列关于劳动争议处理途径的方法,正确的是( ) A.当事人可以协商解决劳动争
最新回复
(
0
)