问题 单项选择题

下图为生态系统中食物链所反映的能量流动情况,图中箭头表示能量流动的方向,单位为kcal/(m2?a)。下列说法错误的是()

A.食物链的营养关系一般不可逆,这决定了能量流动的单向性

B.辐射的太阳能中仅有1%左右的能量被生产者利用

C.每一营养级的能量大部分用于呼吸和被分解者利用

D.此生态系统中的分解者可利用图中A的所有能量

答案

参考答案:D

阅读理解

阅读理解。

     One day an American called Simon went to London to visit his friend, Rick. Rick told him that his flat

was on the first floor. When he arrived, Simon went straight to the first floor of the building. But he was

told that there was no Rick on that floor. Do you know why?

     In fact, the British call the first floor of a building the ground floor. The floor above the ground floor is

the first floor, which Americans would call the second floor.

     The story shows that there are a few culture differences between Britain and American, though the

British and Americans both speak English.

     The British usually hide their feelings. They seldom start a conversation with strangers. For example, on

the train the British often spend their time reading newspapers or books. But Americans are quite different.

They're more active and easier to talk with.

     The British and Americans may use different terms for many things. The British usually use football,

eraser and mail while Americans prefer to soccer, rubber and post.

1. Simon went to London to _______.

A. spend his holiday

B. visit his friend

C. study English

2. Which picture shows us where Rick's flat was?

A. B.C.

3. According to the passage, the British usually spend their time _______ on the train.

A. playing cards

B. talking loudly

C. doing some reading

4. What does the underlined word "terms" mean in Chinese in the passage?

A. 成果

B. 术语

C. 学期

5. What's the main idea of the passage?

A. Different culture between Britain and America.

B. The British and Americans have the same language.

C. The British and Americans have different words.

单项选择题 A3/A4型题