问题 单项选择题

用于鉴别COPD和支气管哮喘的试验是()。

A.过敏原试验

B.支气管激发试验

C.低氧激发试验

D.运动试验

E.支气管扩张试验

答案

参考答案:E

解析:根据COPD定义,COPD肺功能表现是以不可逆的气流受限为特点,其气流受限具有不可逆或部分可逆性,支气管哮喘是以可逆的气流受限为特点。支气管扩张试验是用于检测气流受限的可逆程度的检查,用于鉴别COPD和哮喘。过敏是哮喘患者常见的病因,COPD也可能存在过敏因素,过敏原试验只在哮喘的诊断和病因明确方面起到辅助作用。气道高反应性是支气管哮喘的特点,但COPD亦有部分患者存在气道高反应性,支气管激发试验主要用于临床表现不典型哮喘患者的辅助诊断。运动激发试验是支气管激发试验的一种,对于药物激发阴性患者可以应用。低氧激发试验为错误干扰答案,故本题的正确答案是E。

单项选择题

With the spread of inter-active electronic media a man alone in his own home will never have been so well placed to fill the inexplicable mental space between cradle and crematorium. So I suspect that books will be pushed more and more into those moments of travel or difficult defecation (1) people still don’t quite know what to do with.

When people do read, I think they’ll want to feel they are reading literature, or (2) something serious. (3) you’re going to find fewer books presenting themselves as no- nonsense and (4) assuming literary pretensions and being packaged as works of art. We can expect an extraordinary variety of genre, but with an underlying (5) of sentiment and vision.

Translators can only (6) from this desire for the presumably sophisticated. We can look forward to lots of difficult names and fantastic stories of foreign parts enthusiastically (7) by the overall worship of the "global village" Much of this will be awful and some wonderful, (8) don’t expect the press or the organizers of prizes to offer you much help in making the appropriate distinctions. They will be chiefly (9) in creating celebrity, the greatest enemy of discrimination, but a good prop for the (10) consumer.

Every ethnic grouping over the world will have to be seen to have a great writer--a phenomenon that will (11) a new kind of provincialism, more chronological than geographic, (12) only the strictly contemporary is talked about and (13) . Universities, including Cambridge, will include (14) their literature syllabus novels written only last year. (15) occasional exhumation for the Nobel, the achievements of ten or only five years ago will be largely forgotten.

In short, you can’t go too far wrong when predicting more of the same. But there is a (16) side to this--the inevitable reaction against it. The practical things I would like to see happen--publishers seeking less to (17) celebrity through extravagant advertising, (18) and magazines (19) space to reflective pieces--are rather more improbable than the Second Coming (耶稣复临). But dullness never quite darkens the whole planet. In their own idiosyncratic fashion a few writers will (20) be looking for new departures.

6()

A.benefit

B.derive

C.differ

D.deviate

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