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听力原文：W: Mr. Watson, I wonder whether it' s possible for me to take a vacation early next month.
M: Did you fill out a request form？
Q: What is the probable relationship between the two speakers？
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Urban haze, the scattering or absorption of light, is caused by fine particles.
M: Why don't you buy one yourself？ Think how much time you could save.
Q: What does the man suggest the woman do？
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As for air quality indoors, Australians suffer a higher concentration of pollutants than people in other regions.
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)
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