首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Influenced by movies and popular novels, most people see sharks as people-eating monsters. This is far from the truth. Every yea
Influenced by movies and popular novels, most people see sharks as people-eating monsters. This is far from the truth. Every yea
admin
2010-09-10
68
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.
According to the passage, we need sharks because of the following except ______.
选项
A、they are delicious food for us
B、they are companions of human beings
C、they can help rescue human beings
D、they can help improve human health
答案
B
解析
细节题。根据第三段第一句Sharks help save human lives,第二句In addition to pro viding people with food,和第四段第二句Understanding why can help us improve human health可知选项A、C、D俱为我们需要鲨鱼的原因,故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/dB87777K
0
大学英语四级
相关试题推荐
Itusedtobethecasethatifyouleftyourcarinthesunonahotsummer’sday,thengettingbackinagainafterwardswasago
Itusedtobethecasethatifyouleftyourcarinthesunonahotsummer’sday,thengettingbackinagainafterwardswasago
A、Shegenerallydoesn’tallowpeopletoborrowit.B、Sheistryingtosellit.C、Sheboughtitfromafriend.D、Ithasbrokendo
Havingnolanguage,infantscannotbetoldwhattheyneedtolearn.Yet,thefirstyearsoflifeisbelievedtobethemostfavo
Havingnolanguage,infantscannotbetoldwhattheyneedtolearn.Yet,thefirstyearsoflifeisbelievedtobethemostfavo
Canmoneybuyhappiness?Yes,exclaimtheauthorsofanew【M1】______study—butonlyuptoapoint.Psychologyhas
Canmoneybuyhappiness?Yes,exclaimtheauthorsofanew【M1】______study—butonlyuptoapoint.Psychologyhas
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeopleareanxiousandself-conscious;thatis,theyare【B
随机试题
A、排卵前24小时B、月经来潮前14天C、排卵后24小时D、排卵后7~8天E、月经来潮前24小时促黄体生成素的高峰时间是()
正态分布的概率密度函数,总体标准差σ愈大,曲线低而宽,随机变量在平均值μ附近出现的密度愈小;总体标准差σ愈小,曲线高而窄,随机变量在平均值μ附近出现的密度愈大。()
民用建筑楼梯梯段两侧设扶手的条件是:(2019年第23题)
如果某项目生产经营期的第一年出现亏损,则该项目在此年可以免缴()。
按定额的编制程序和用途分类,可以把工程定额分为()。
取得甲级工程造价咨询企业资质的,企业出资人中的注册造价工程师人数不低于出资人总人数的()。
打工妹微微因反抗雇主的性骚扰被辞退,并被欠发3个月的工资,多次讨薪未果,微微非常愤怒。对此社会工作者的介入重点是()。
社会治安综合治理建设包括()
下列属于附条件的民事法律行为的是()。
阅读下列说明,回答问题1至问题3,将答案填入答题纸的对应栏内。[说明]在日常工作和生活中,用户经常利用Photoshop对拍摄的数码照片进行后期处理,如对照片进行放大、缩小、旋转、镜像等几何变换,或将几张照片合成为一幅具有创意的新照片。[问题1]
最新回复
(
0
)