Question

Sharks are among the oldest animals on Earth. There are hundreds of kinds of sharks. Most are about two meters long. The dogfish shark, however, is less than twenty centimeters in length. A shark has an extremely good sense of smell. It can find small amounts of matters in water, such as blood, body liquids and chemicals produced by animals. These powerful senses help sharks find their food. Sharks eat fish, other sharks, and plants that live in the ocean.

Sharks grow slowly. About forty percent of all sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies as humans do. Some sharks are not able to reproduce until they are twenty years old. Most reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, over-fishing of sharks is of special danger to the future of the animal.

Sharks are important for the world’s oceans. They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too large. This protects the plants and other forms of life that exist in the oceans.

People 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. Experts say a fisherman can earn a lot of money for even one kilogram of shark fins. Sharks are among the oldest animals on Earth, but some sharks are in danger of disappearing from Earth. If too many sharks in one area are killed, that group of sharks may never return to normal population levels.

1.. Which of the following words best describes the situation sharks are in?

A．Good.

B．Endangered.

C．Powerful.

D．Expensive.

2. Sharks eat other fish, __________.

A．which is a threat to all other forms of life in the oceans

B．which is a protection for plants and other forms of life in the oceans

C．which helps prevent diseases from spreading

D．which helps the number of other fish to grow

3. According to the passage, many parts of a shark are valuable EXCEPT ________.

A．its jaws

B．its liver

C．shark fins

D．shark teeth

4.The author thinks that______.

A．sharks are valuable to us and we can make full use of them

B．oceans will become safer with fewer sharks swimming around

C．measures should be taken to protect sharks

D．the shark population is increasing slowly

 

Answer 1

【答案】

1.B

2.B

3.D

4.C

【解析】

试题分析：

1..B 细节题。根据文章最后两行Sharks are among the oldest animals on Earth, but some sharks are in danger of disappearing from Earth. If too many sharks in one area are killed, that group of sharks may never return to normal population levels.说明鲨鱼现在处于很危险的情况。故B正确。

2.B 细节题。根据第三段最后一句. This protects the plants and other forms of life that exist in the oceans.说明B正确。

3..D 细节题。根据文章第三段最后两行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.说明鲨鱼的ABC三项都很珍贵，只有D项文章没有以及。

4..C 推理题。文章中讲述了鲨鱼对于海洋的重要性以及现在的鲨鱼正处于危险之中，说明我们要采取措施来保护鲨鱼。故C正确。

考点：考查科普类短文阅读

点评：文章中介绍了鲨鱼对于海洋的重要性以及现在的鲨鱼正处于危险之中。文章以细节题的考查为主，考查的内容都在文章里有直接的提现，考生只需要按照题目的要求确定题目的考查语群，不难得出答案。