问题 配伍题 B型题

倍他乐克治疗心绞痛的作用机制是( )|

A.通过抑制钙离子进入冠脉、周围血管壁平滑肌细胞内而扩张冠脉及周围血管

B.抑制血小板聚集

C.减慢心率、降低心肌收缩力、减少心肌耗氧量

D.扩张冠脉及外周血管,减轻心脏负担

E.改善心肌营养与代谢

答案

参考答案:C

阅读理解

阅读理解.

     When you travel (旅游) in Hong Kong, you must be careful of the traffic (交通) rules, because the

traffic keeps to the left and it's different from that of the interior (内地) of China. Before crossing the

street, you must look to the right and then to the left. If the traffic lights are red, the traffic must (必须)

stop, people can go across the zebra line. If the traffic lights turn green, the traffic can go, and people

mustn't cross the road.

     In the morning and in the evening, when people go to or come from work, the streets are very busy.

The traffic is the most dangerous.

     When you go somewhere by bus in Hong, you have to be careful, too. Always remember the traffic

keeps to the left. Have a look first, or you may go the wrong way. In Hong Kong, there are a lot of big

buses with two floors. You'd better sit on the second floor. From there you can watch the city very well.

How interesting !

1. In Hong Kong the traffic moves _____.

    A. on the right

    B. on the left

    C. in the middle

    D. in the park

2. When you cross the street, you must look to _____ first.

    A. the front

    B. the right

    C. the left

    D. B and C

3. If the traffic lights are red, _____.

    A. the people must stop

    B. the traffic must stop

    C. the people and the traffic must stop

    D. the traffic and the people must wait

4. It is _____ to cross the streets in the morning and in the evening.

    A. dangerous

    B. interest

    C. easy

    D. safe

5. You can see the city very well on the _____ floor of the bus.

    A. first

    B. second

    C. third

    D. fourth

选择题