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
2024-05-08
13
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/3588836.html
相关试题推荐
[originaltext]BecauseIrelandisanislandgeographicallynearthemainland
[originaltext]BecauseIrelandisanislandgeographicallynearthemainland
[originaltext]EnglandwasthefirstcountrytocompetewithSpainforclaim
[originaltext]EnglandwasthefirstcountrytocompetewithSpainforclaim
[originaltext]W:Howard,whatareyouworkingonnow?M:Ihavejustfinisheda
[originaltext]M:MybrotherMikehasjustdoneacourseattheGreenParkCampi
[originaltext]M:MybrotherMikehasjustdoneacourseattheGreenParkCampi
[originaltext]M:Ilookedattheapartmentyourecommended.Itisapit.W:Wel
[originaltext]M:Ilookedattheapartmentyourecommended.Itisapit.W:Wel
[originaltext]M:Ilookedattheapartmentyourecommended.Itisapit.W:Wel
随机试题
TheFairnessofCollegeEntranceExamsI.SATandACT:major
ItstartedwithanitchafterastrollonaCaribbeanbeach,butinjust
MarcoPolowasborninItalyin1254.Hewasthemost【71】f______westernerto
食管癌最可靠的诊断方法是A.X线吞钡 B.超声 C.黏膜脱落细胞 D.内镜
碱性磷酸酶染色时中性晚幼粒细胞呈阳性反应见于A.类白血病反应B.肾上腺皮质激素C
A.不具挥发性 B.能被强氧化剂破坏 C.能溶于水 D.180℃,3~4小
近年来,生活小区内养狗的居民越来越多,其中部分居民遛狗时不系绳子,草地上随处可见
依法必须招标的工程建设项目的____应报项目审批部门核准,报招标投标行政监督部门
根据《城镇职工基本医疗保险用药范围管理暂行办法》,纳入医保药品目录的药品应当具备
请演示腹壁紧张度触诊的检查方法。
最新回复
(
0
)