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
2023-08-31
92
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.
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
推理判断题。原文分别阐述了鲨鱼的种类,鲨鱼的嗅觉,鲨鱼的生产方式,鲨鱼在科学研究上的重要性。A选项是号召人们保护鲨鱼;B选项是说鲨鱼的生存环境;C选项是说鲨鱼为什么是危险的,都不是对这四段的概括。只有选项D对鲨鱼的介绍,可以看作是对这四段的概括。答案是D。
转载请注明原文地址:https://tihaiku.com/zcyy/2972570.html
相关试题推荐
[originaltext]M:Sorry,IseemtohaveleftmystudentIDcardathome.W:Doy
[originaltext]M:Sorry,IseemtohaveleftmystudentIDcardathome.W:Doy
【B1】______[br]【B10】______[originaltext]Whydopeoplemarry?Peopledivo
【B1】______[br]【B7】______[originaltext]Whydopeoplemarry?Peopledivor
【B1】______[br]【B6】______[originaltext]Whydopeoplemarry?Peopledivor
【B1】______[br]【B5】______[originaltext]Whydopeoplemarry?Peopledivor
【B1】______[br]【B2】______[originaltext]Whydopeoplemarry?Peopledivor
[originaltext]TheworldwideorganizationoftheRedCrossstemsfromtheide
[originaltext]TheworldwideorganizationoftheRedCrossstemsfromtheide
[originaltext]TeadrinkingwascommoninChinafornearlyonethousandyear
随机试题
JeanWagner’smustenduringcontributiontothestudyofAfro-Americanpoetryis
TheNewMathonCampusSexualImbalanceinCollegesAftermidni
Someyearsago,anAmericanpolicemanfoundawomanlyingnearalonelyroad
2009年6月10日5时17分,A煤矿井下南一盘区15201进风副巷综掘工作面发
足三阴经在内踝上8寸以上肢体部的分布规律是A、少阴在前、厥阴在中、太阴在后 B
赵某委托甲房地产经纪公司(以下简称甲公司)出售一套二手房,在签订房地产经纪合同前
社会救助社会工作包括物质方面的社会救助、精神层面的内在提升以及救助对象的()恢
考虑生物节律和食物对药效的影响,适合清晨和睡前给药的是A.阿仑膦酸钠 B.酮替
某省5月31日21时发生一起载客电梯由观光层坠落至电梯井底事故,事故造成多人伤亡
基尔霍夫电流定律适用于( )。A.节点 B.支路 C.网孔 D.回路
最新回复
(
0
)