题目内容
As for air quality indoors, Australians suffer a higher concentration of pollutants than people in other regions.
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听力原文：M: Well, how' s the patient this morning？
W: He appears to have had a very restless night.
M: Oh. Was he in very severe pain？
W: Yes. I' m afraid he was, doctor.
M: Hmm. In that case, I think we' d better increase his dosage of diamorphine.
W: Yes, doctor. By how much？
M: Let' s see. How much is he on at the moment？
W: Five milligrams.
M: Hmm. Increase it to fifty.
W: Fifty？ All at once？
M: Yes, that' s what I said, nurse.
W: But that' s an increase of forty - five milligrams.
M:I' m quite aware of that. However, when I operated on the patient yesterday, I found his abdomen was riddled with carcinoma. I' m sure you realize what that means.
W: Yes, I do, doctor. But I still don' t feel I can accept responsibility for administering such an increase.
M: Can't you？ What exactly do you suggest, than？
W: That if you' re convinced it' s the right thing to do, you ought to administer the injection yourself.
M: Hmm. I see what you mean. Very well, I will.
(20)
Photochemical smog is formed on rainy days when chemicals are combined with smoke.
The pH of polluted rainwater ranges from about 6 to just below
听力原文：W: Bob said that Seattle is a great place for conferences.
M: He's certainly in a position to make that comment. He's been there so often.
Q: What does the man say about Bob？
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