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问题 多项选择题

吗啡的药理作用包括（）。

A.吗啡肌内注射后吸收良好，主要在肝经受生物转化

B.常常作为心脏手术患者的麻醉前用药

C.仅对躯体疼痛有效

D.瞳孔呈针尖样是吗啡急性中毒的特征性体征

E.吗啡的消除半衰期为2~3h，老年人的清除率约减少一半

答案

参考答案：A, B, D, E

单项选择题

婴儿期最易出现心衰的病因是

A．心肌炎

B．心内膜弹力纤维增生症

C．先天性心脏病

D．风湿性心脏病

E．急性肾炎
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单项选择题

Are you a man or a mouse When people ask this question they want to know (1) you think you are a (2) person or a coward. But you will never really know the answer to this question (3) you are tested in real life. Some people (4) they are brave but when they come face to face with real (5) , they act like cowards. Others think of themselves as cowards, but when they meet danger, they act like (6) .Lenny had always thought of himself as a (7) person. He got worried before examinations. He worried about his job and health. All he wanted in life was to be safe and healthy. (8) , on January 15th, 2002, a plane crashed into the Potomac River in Washington. Lenny went to the river to See what was happening. He saw a woman in the (9) water. Lenny did not feel afraid. He kept very (10) and did a very dangerous thing. He jumped into the Potomac, (11) to the woman, and kept her head (12) the water. Seventy-eight people died that day. Thanks to Lenny, it was not (13) .When you are in a very (14) situation and feel afraid, the body automatically produces a chemical in the blood. The chemical is called adrenalin. (15) adrenalin in the blood system, you actually feel per and per and are (16) to fight or run away. However, when you are absolutely terrified, the body can produce too much adrenalin. Where this (17) , the muscles become very hard and you find you (18) move at all. You are then paralyzed with fear. This is (19) when we are very frightened, we sometimes say we’re "petrified". This word comes from the Greek word "petros", which means "stone". We are (20) frightened that we become stonelike.

第（18）空应选择（）

A．needn’t

B．can’t

C．mustn’t

D．shouldn’t
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