Question

【题目】 Do you like to eat sushi(寿司)? Many people are afraid to eat it, because they think the bacteria(细菌) in it might make them sick. However, a new study shows that sea bacteria are good for people. The study finds that a special enzyme(酶) from sea bacteria is helpful to humans. It helps people to get more energy from food.

To people’s surprise, the enzyme is present only in the Japanese. The Japanese traditionally like to eat food rich in seaweed(海藻). And the seaweed is rich in this kind of enzyme.

However, the enzyme isn’t present in all the Japanese. During the study, just 5 out of 14 Japanese had the enzyme. All the Americans studied didn’t have the enzyme.

“The number is small,” said researcher Mirjam Czjzek. “But we can say that this enzyme is present only in the Japanese and not in the North Americans.”

Then some people think that maybe other people are able to get the enzyme if they eat a lot of seaweed. The study suggests that they collect uncooked seaweed to make their sushi.

Restaurant sushi is often cooked, which will destroy the enzyme. So, if you want to get that enzyme, you can travel to Japan to have a taste of the real sushi.

【1】Which has the same meaning as the underlined word “destroy”?

A.ruinB.protectC.throwD.keep

【2】Why do the Japanese have the special enzyme?

A.Because they like to eat food full of bacteria.

B.Because they were born with such an enzyme.

C.Because they get more energy from food.

D.Because they eat a lot of seaweed.

【3】Which of the following is wrong?

A.The Japanese have a diet rich in seaweed.

B.All the Japanese studied have the special enzyme.

C.All the North Americans studied don’t have the enzyme.

D.The enzyme helps people to get more energy.

【4】According to the study, about _______ of Japanese have the enzyme.

A.5%B.14%C.35%D.60%

【5】Which of the following is the best title?

A.Restaurant sushi.B.Sea bacteria.C.Seaweed soup.D.A special enzyme.

Answer 1

【答案】

【1】A

【2】D

【3】B

【4】C

【5】D

【解析】

本文是一篇说明文，主要介绍了存在于海藻中的一种特殊的酶，这种酶对人身体有益，帮助人们从食物中获取更多的能量。

【1】词句猜测题。ruin破坏；protect保护；throw扔掉；keep保持。根据“Restaurant sushi is often cooked, which will destroy the enzyme”可知，饭店的寿司被加工之后就会破坏这种酶，故划线部分destroy意为“破坏”与ruin同义。故选A。

【2】细节理解题。根据第二段“The Japanese traditionally like to eat food rich in seaweed. And the seaweed is rich in this kind of enzyme”可知，日本人经常吃富含这种酶的海藻，所以他们体内有这种特殊的酶。故选D。

【3】细节理解题。A选项：日本人的饮食中含有丰富的海藻。根据“The Japanese traditionally like to eat food rich in seaweed”可知，选项正确；B选项：所有被研究的日本人都有这种特殊的酶。根据“the enzyme isn’t present in all the Japanese”可知，选项错误；C选项：所有被研究的北美人都没有这种酶。根据“All the Americans studied didn’t have the enzyme”可知，选项正确；D选项：这种酶帮助人们获得更多的能量。根据“It helps people to get more energy from food”可知，选项正确。故选B。

【4】细节理解题。根据第三段“During the study, just 5 out of 14 Japanese had the enzyme”可知，在研究中14个日本人中有5人有这种酶，5/14约等于35%。故选C。

【5】最佳标题题。根据第一段“The study finds that a special enzyme(酶) from sea bacteria is helpful to humans”及全文内容可知，本文主要围绕一种特殊的酶展开，介绍了它的存在环境及对人体的作用，因此D选项“一种特殊的酶”可作为本文标题。故选D。