题目内容
已知某药口服肝脏首过作用很大，改用肌肉注射后：
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某药静脉注射经4个半衰期后，其体内药量为原来的：
Teaching is a highly-complex occupation because teachers take on ______.
[听力原文]9-10W: Now, Mr. Sun, did you see the accident clearlyM: Oh, yes. I was standing outside the post office.W: Can you remember what time it happenedM: Yes, it was 4:25 by my watch.W: Good. Now, was the truck going fastM: Yes. Well, perhaps the driver thought the traffic lights were going to change to green. But they were red.W: Are you sum, Mr. SunM: Yes, absolutely sure.W: Well, thanks a lot, Mr. Sun. Good-bye.M: Good-bye. What did the man tell the woman（）
[听力原文]11-15When Tim left school, he did not really know what he wanted to do. At first, he worked (Q11)in an office, but soon he found that it was boring. (Q12) There was also trouble with his second job in a car factory. He then decided to work out of doors, and (Q13) got a job as a gardener in a park. Now he works much harder than he did in the office or in the factory, (Q14)because his work is more varied. He works hardest in autumn and winter, keeping the park tidy and preparing for spring and summer. In summer he can relax and he can feel proud that (Q15)he has helped to make the park so beautiful. Many people visit the park and he is always pleased when he hears them say how lovely it looks. Why did he give up his job in the factory Because he had（）
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