如图所示，在倾角为30°的斜面上，有一放在静止的手推车里的篮球，其质量为500

阅读理解。

    An old scientist recently made several tests with different animals to find out which was cleverer than

other animals.

    In one test the old scientist put a monkey in a room where there were several boxes. Some boxes were

inside other boxes. One small box had some food in it. The scientist wanted to watch the monkey and to

find out how long it would take the monkey to find the food. The scientist left the room. He waited a few

minutes outside the door. Then he got down on his knees (膝盖) and put his eyes to the keyhole. What did

he see? To his surprise, he found himself looking into the eye of the monkey. The monkey was on the other

side of the door and looked at the scientist through the keyhole.

1. The scientist did the test to see ______. [ ]

A. if the monkey would steal (偷) the food

B. if the monkey would look for the food

C. if the monkey was cleverer than other animals

D. if some boxes were inside other boxes

2. In one test the scientist put a monkey ______. [ ]

A. into a small box

B. into several small boxes

C. into a box where there was some food

D. in a room

3. After the scientist left the room, the monkey ______. [ ]

A. began to eat food

B. began to look for food

C. looked at the scientist through the keyhole

D. came into the boxes one after another

4. The scientist ______. [ ]

A. got down on his knees and waited outside the door

B. got down on his knees and heard with his ears

C. left the room for a long time

D. looked at the monkey through the keyhole with his eyes

5. To the scientist's surprise ______. [ ]

A. the monkey got down on its knees

B. the monkey came out of the room

C. the monkey looked at the scientist through the window

D. the monkey put its eye to the keyhole

股票市场价格的最直接影响因素是( )，其他因素都是通过作用于该因素而影响股票价格。

A．供求关系

B．公司经营状况

C．宏观经济因素

D．政治因素

压力容器气压试验时，试验单位的（）部门应进行现场监督。

属于牙齿发育异常的是（）。

A.斜齿

B.阶状齿

C.龋齿

D.滑齿

E.赘生齿

各级机关和直属单位的驾驶员应集中居住、统一编班，并指定专人归口管理。要统一保管（），驾驶员出车时领取，归队时立即交回。

A、车辆钥匙

B、行驶证

C、驾驶证

D、身份证