问题 选择题

肾小球实质上是毛细血管构成的,连接它的入球血管和出球血管分别应当是(  )

A.小动脉和小静脉

B.小静脉和小动脉

C.小动脉和小动脉

D.小静脉和 小静脉

答案

肾动脉通过入球小动脉与肾小球相连.肾小球是个血管球,它由入球小动脉分出的数十条毛细血管弯曲盘旋而成,这些毛细血管最后汇成出球小动脉.出球小动脉与肾小管周围的毛细血管相连,血液经肾小管周围毛细血管的流入肾静脉.因此,肾小球连接它的入球血管和出球血管分别应当是小动脉和小动脉.

故选:C.

阅读理解

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

判断题