题目内容
【题目】 Discover Sharks
Sharks have lived in the oceans for over 450 million years, long before dinosaurs appeared. There are now about 360 kinds of sharks, whose size, behavior, and other characteristics differ widely.
Every year, people catch and kill over 100 million sharks. They hunt sharks for sport, food, medicine and their skin. Experts say the international market for some kinds of sharks has increased because many parts of a shark are valuable. Collectors pay thousands of dollars for the jaws of a shark. Shark liver oil is a popular source of Vitamin A. The skin of a shark can be used like leather. In Asia, people enjoy a kind of soup made from shark fins.
It takes most kinds of sharks10 to 15 years to begin reproducing (繁殖)and most sharks reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, over-fishing of sharks is the special danger to the future of the animal.
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 shark injure about 100 people worldwide and kill about 25. Most attacks are by great white sharks, which often feed on sea mammals, just like sea lions，sea dogs and dolphins. They sometimes mistake human swimmers for their food, especially if they are wearing black wet suits.
If you are a typical ocean-goer, your chances of being killed by a shark are about 1 in 100 million. You are more likely to be killed by a pig than a shark and thousands of times more likely to get killed when you drive a car.
According to the studies, most sharks can live 20 to 30 years. Although sharks cannot live as long as human beings, they have the similar aging process. Sharks help save human lives. They are helping us learn how to fight cancer and other diseases. Their highly effective immune(免疫的) system allows wounds to get better and their blood is being studied in connection with AIDS research.
Sharks are needed in the world’s ocean ecosystems(生态系统). 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.
【1】The second paragraph is mainly about ______.
A. why people kill sharks
B. who makes sharks in danger
C. what causes people fear sharks
D. how sharks produce their babies
【2】The word ‘‘aging process’’ in Paragraph 6 probably means “ ______”.
A. sharks have their own family
B. sharks live from baby to the old
C. sharks have their own language
D. sharks raise their children all the time
【3】What can we learn from the passage?
A. People find dinosaurs have lived long before sharks.
B. One hundred people are killed by sharks every year.
C. Sharks are helping people fight diseases like cancer.
D. Sharks give birth young babies every 10 to 15 years.
【答案】
【1】A
【2】B
【3】C
【解析】
很多人对鲨鱼有错误的看法，认为他们是吃人的；还有很多的人为了不同目的大肆捕杀鲨鱼，导致鲨鱼的数量大大减少。其实鲨鱼对我们以及我们的生态系统是非常重要的。
【1】细节理解题。根据短文第二段的文意和开头Every year, people catch and kill over 100 million sharks. They hunt sharks for sport, food, medicine and their skin可知，这一段介绍的是每年人们捕杀超过10,000万鲨鱼，他们猎杀鲨鱼有不同的目的。故应选A。
【2】词义猜测题。根据这个短语所在的句子Although sharks cannot live as long as human beings, they have the similar aging process可知，这句话把鲨鱼与人类做了一个比较，它不像人类那样长寿，但有相似的…，其中age意为“年龄”，由此可推测，鲨鱼会像人类一样经历从小到老的这种过程。故应选B。
【3】细节理解题。根据短文第六段Sharks help save human lives. They are helping us learn how to fight cancer and other diseases可知，鲨鱼可以帮助救人类的生命，他们正帮助我们学习怎样抵抗癌症以及其他疾病。由此可知应选C。
