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阅读理解。

     Once a group of 17-year-old schoolboys decided to break the world basketball marathon record (马拉

松记录). They wanted to play for ninety hours and that is to add six hours to the record. Each team has

nine players, with five at a time. The boys decided each person would play 21.5 hours and then rest for 2

hours. Then they started at 6 o'clock in the evening.

    The first night was very hard for the players. When it was their turn to rest, they were too excited to fall

asleep at once. After sleeping for a short time, they had to play again. On the second night, they fell asleep

as soon as they stopped. Some of them had trouble with their feet and hands, but the only serious problem

was a psychological (心理上的) one. Each boy was thinking: Why am I doing this? How can I play any longer?

    After the third night, The players knew they could finish the ninety hours. The basketball on the fourth

night was very slow. But in the final hours, the players got better. For the last few minutes, the players looked

as fresh as when they started. How happy everyone was!

1. In the story, there were ______ schoolboys playing basketball marathon.

A. 9

B. 14

C. 17

D. 18

2. Before this basketball marathon, the world record was ______.

A. 84 hours

B. 86 hours

C. 90 hours

D. 96 hours

3. The first night was hard for the players to fall asleep because ______.

A. they were too excited

B. they only slept for a short time

C. no one watched them play

D. it was very long

4. The word "fresh" in the sentence"…the players looked as fresh as when they started" means ______.

A. 新鲜的

B. 兴奋不已的

C. 精神饱满的

D. 伤痕累累的

5. Which of the following sentences is wrong?

A. Some of the boys were hurt when they played.

B. It was hard for the players to fall asleep at night.

C. The boys started playing at 6 o'clock in the evening.

D. In the end, the boys felt happy.

环境污染中固体废物种类繁多，其中，按照废物的来源，可分为( )。

A．有机废物和无机废物
B．有害废物和一般废物
C．城市垃圾、工业固体废物、农业废弃物和放射性固体废物
D．颗粒状废物与粉状废物等块状废物和泥状废物

下列各项不属于社会政策资源中的物力资源的是( )。

A．办公场所
B．办公设备
C．社会工作者
D．社会服务所需物质

下列各项中，不属于会计职业道德主要作用的是( )。

A．对会计法律制度的重要补充

B．规范会计行为的基础，是实现会计目标的重要保证

C．会计人员提高素质的内在要求

D．对会计职务犯罪加以惩处

下列关于遗传密码的叙述中正确的是

A．一个密码子可代表多种氨基酸
B．每一种氨基酸只有一个密码子
C．每个tRNA 上的反密码子只能识别一种密码子
D．密码子的第三位碱基与反密码配对可不严格互补