单项选择题

可引起呼吸性酸中毒的疾病应除外

A.镇静药过量
B.支气管强烈痉挛
C.严重气胸
D.肺气肿
E.肾功能不全

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听力原文：W: Professor, (19)I'm going to take part in a debate on advertising tomorrow. Would you please give me some hint?M: That's interesting. I should like to hear what young people think about advertising.W: Well, (20)we wouldn't know what there was to buy if we didn't have advertisements.M. Yes. that's true up to El point. Advertisements provide information that we neeD.If someone has produced a new article, naturally the seller wants to tell us about it.W: Yes, and (20) advertisements tell us which product is the best.M: Do they? I don't think so. Every manufacturer says that his product is the best, or at least tries to give that impression. Only one can be the best, so the others are misleading us, aren't they?W: Well, in a way, I suppose, but we don't have to believe them, do we?M: Are you saying that advertisements aren't effective? (21)I don't think that intelligent businessmen would spend millions of dollars on advertising if nobody believed the advertisements, do you?W: (20)Perhaps not, }0ut after all, it's their money that they're spending.M: Is it? I think not. The cost of advertising is added to the price of the articlE.You and I and all the other people who buy the article pay for the advertising!W: Well, (20)I suppose we get something for our money--some information.M: Yes, but don't forget it's often misleading information, and sometimes harmful.(20)A.To ask the man to debate with her.B.To get some suggestion about advertisement.C.To invite him to be a judge for a debatE.D.To get some ideas for a debatE.

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单项选择题

关于代谢性酸中毒的病因，正确的是

A.低钾血症引起
B.大量利尿引起
C.体内碳酸增高引起
D.大量呕吐胃内容物引起
E.体内碳酸氢根的减少引起

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