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
2023-09-17
50
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:http://tihaiku.com/zcyy/3020848.html
相关试题推荐
[originaltext]M:(6)CanIhelpyou?W:(6)Yes,Iamlookingforapairofgloves.
[originaltext]M:(6)CanIhelpyou?W:(6)Yes,Iamlookingforapairofgloves.
[originaltext]W:Wouldyouliketoseeamenu?M:No,thankyou.Ialreadyknow
[originaltext]W:Wouldyouliketoseeamenu?M:No,thankyou.Ialreadyknow
[originaltext]W:Wouldyouliketoseeamenu?M:No,thankyou.Ialreadyknow
Whatarethereinoursocietynowadays?Thereare______.[br][originaltext]
Whatarethereinoursocietynowadays?Thereare______.[br][originaltext]
Whatarethereinoursocietynowadays?Thereare______.[br][originaltext]
Whatarethereinoursocietynowadays?Thereare______.[br][originaltext]
[originaltext]M:Thisisyourannualperformanceevaluation.W:SohowdidId
随机试题
Thegraduatecommitteemustbeinfullaccordintheirapprovalofadissertatio
It’sdifficulttoimaginetheseaeverrunningoutoffish.It’ssovast,so
NarratorListentoalectureinanartclass.Nowgetreadytoanswer
[originaltext]W:Iwanttoregisterforthismathematicscourse.M:I’msorryr
Thechangeinthatvillagewasmiraculou
患者,40岁。排便后肛门外剧烈疼痛,并出现一触痛性明显的包块,最可能的诊断是A:
小王从农贸市场买来一条金鱼,没过几天鱼就死了,下列最有可能导致金鱼死亡的原因是(
下列关于术前准备的叙述中,错误的是( )。A.高血压患者应继续服用降压药物,避
牙周炎时造成牙齿松动的最主要原因是A:牙龈的急性炎症 B:急性根尖周炎 C:
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)