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问题 单项选择题 A1/A2型题

用0.5%氯已定酒精溶液进行手消毒时，可保持手的清洁在2小时左右，这种作用称为 （）

A.拮抗作用

B.后效作用

C.吸附作用

D.分解作用

E.增强作用

答案

参考答案：B

解析：0．5%碘伏和0.5%氯已定酒精溶液与皮肤结合后具有后效作用，可保持手的清洁在2小时左右，手术前用这种消毒剂消毒手术者的手部，可防止手术过程中，手套内部因出汗而滋生细菌。

单项选择题

Standard English is the variety of English which is usually used in print and which is normally taught in schools and to non-native speakers learning the language. It is also the variety which is normally (1) by educated people and used in news broadcasts and other (2) situations. The difference between standard and nonstandard, it should be noted, has (3) in principle to do with differences between formal and colloquial (4) ; standard English has colloquial as well as formal variants.

(5) , the standard variety of English is based on the London (6) of English that developed after the Norman Conquest resulted in the removal of the Court from Winchester to London. This dialect became the one (7) by the educated, and it was developed and promoted (8) a model, or norm, for wider and wider segments of society. It was also the (9) that was carried overseas, but not one unaffected by such export. Today, (10) English is arranged to the extent that tile grammar and vocabulary of English are (11) the same everywhere in the world where English is used; (12) among local standards is really quite minor, (13) the Singapore, South Africa, and Irish varieties are really very (14) different from one another so far as grammar and vocabulary are (15) .Indeed, Standard English is so powerful that it exerts a tremendous (16) on all local varieties, to the extent that many of long-established dialects of England have (17) much of their vigor and there is considerable pressure on them to be (18) . This latter situation is not unique (19) English: it is also true in other countries where processes of standardization are (20) .But it sometimes creates problems for speakers who try to strike some kind of compromise between local norms and national, even supranational ones.

10（）

A.formal

B.colloquial

C.non-standard

D.standard
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单项选择题

胡军今年的年龄恰好是他儿子的4倍，16年后，他恰好比儿子大一半，胡军今年（）岁。

A．54

B．48

C．32

D．24
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