首页
登录
职称英语
Influenced by movies and popular novels, most people see sharks as people-ea
Influenced by movies and popular novels, most people see sharks as people-ea
游客
2024-02-24
47
管理
问题
Influenced by movies and popular novels, most people see sharks as people-eating monsters. This is far from the truth. Every year, a few types of sharks injure about 100 people worldwide and kill about 25. Most attacks are by great white sharks, which often feed on sea lions and other marine mammals (海洋哺乳动物) . They sometimes mistake human swimmers for their normal prey, especially if they are wearing black wet suits.
If you are a typical ocean-goer, your chances of being killed by an unprovoked attack by a shark are about 1 in 100 million. You are more likely to be killed by a pig than a shark and thou sands of times more likely to get killed when you drive a car. Sharks help save human lives. In addition to providing people with food, they are helping us learn how to fight cancer, bacteria (细菌), and viruses. Sharks are very healthy and have aging processes similar to ours. Their highly effective immune system allows wounds to heal quickly without becoming infected, and their blood is being studied in connection with AIDS research.
Sharks are among the few animals in the world that almost never get cancer and eye cataracts (白内障). Understanding why can help us improve human health. Chemicals extracted from shark cartilage (软骨) have killed cancerous tumors in laboratory animals, research that someday could help prolong your life.
Sharks are needed in the world’ s ocean ecosystem. Although they don’ t need us, we need them. We are much more dangerous to sharks than they are to us. For every shark that bites a person, we kill one million sharks. [br] The passage mainly discusses ______.
选项
A、the number of people being attacked by sharks
B、the benefits of sharks to improving human health
C、the dangers sharks have brought to human beings
D、the relationship between sharks and human beings
答案
D
解析
主旨题。选项A、B和C都过于片面,不能概括出文章的主题。答案为D。
转载请注明原文地址:http://tihaiku.com/zcyy/3478162.html
相关试题推荐
Energylevelsebbandflowthroughouttheday,influencedbyeverythingfrom
Energylevelsebbandflowthroughouttheday,influencedbyeverythingfrom
Energylevelsebbandflowthroughouttheday,influencedbyeverythingfrom
Energylevelsebbandflowthroughouttheday,influencedbyeverythingfrom
NicotineIfitweren’tfornicotine,peoplewouldn’t
NicotineIfitweren’tfornicotine,peoplewouldn’t
NicotineIfitweren’tfornicotine,peoplewouldn’t
NicotineIfitweren’tfornicotine,peoplewouldn’t
NicotineIfitweren’tfornicotine,peoplewouldn’t
Approximately90%ofpeopleintheworldarenaturallyrighthanded.Whyis
随机试题
Lipstickplaysanimportantroleinsexual【C1】______andcanevenprotectthe
Nearlytwo-thirdsofthecountry’smushroomcropisproducedby160growersina
ThemightyLuceorPikeistakentobetheTyrant,astheSalmonistheKing,
Whatdoesthemanthinkaboutactingintelevisionversusmovies?A、Televisions’
在质量方面指挥和控制组织的协调的活动称为()。A.质量策划 B.质量改进
如下化学结构的药物是()。 A:奥卡西平 B:加巴喷丁 C:艾司唑仑
混凝土表面涂层耐碱试验说法正确的是()。A.混凝土试块取6个 B.试块标
测定血糖的标本最常采用的抗凝剂和防腐剂组合是A.碘乙酸钠-EDTANaB.叠氮
下述甲状腺激素水平升高对甲亢的诊断最有价值的是A:TT3B:TT4C:FT3
在( )原则下,企业可以根据自身特点做合理选择,有所为有所不为,才能够使资源得
最新回复
(
0
)