细胞中发生突变的原因是（） A.酶蛋白分解 B.改变遗传密码 C.没有提供葡萄糖分子

肺结核大咯血抢救时需特别注意的是（）

A.血压监测

B.测出血时间，预防DIC

C.慎用镇咳、镇静剂

D.保持呼吸道通畅

E.患侧卧位

某女孩，5岁，症见遗尿，尿量不多，尿味臊臭，舌质红苔黄，脉数有力。治疗首选方为（）

A.菟丝子散

B.补中益气汤

C.龙胆泻肝汤

D.肾气丸

E.八正散

以下那个说法是正确的（）

A.焦距越大，镜头作用距离越远

B.焦距越大，主体目标影响越大

C.焦距越大，范围越大

D.焦距越大，影响景深越大

“宇宙以其不息的欲望将一个歌舞炼为永恒。这欲望有怎样一个人间的姓名，大可忽略不计。”以这句结尾的作品是（）。

A.史铁生的《我与地坛》

B.邵燕祥的《<圣经>拟作》

C.阿城的《棋王》

D.唐弢的《<书海夜航>二集序》

In every cultivated language there are two great classes of words which, taken together, comprises the whole vocabulary. First, there are those words (1) which we become acquainted in daily conversation, which we (2) , that is to say, from the (3) of our own family and from our familiar associates, and (4) we should know and use (5) we could not read or write. They (6) the common things of life, and are the stock in trade of all who (7) the language. Such words may be called "popular", since they belong to the people (8) and are not the exclusive (9) of a limited class.

On the other hand, our language (10) a multitude of words which are comparatively (11) used in ordinary conversation. Their meanings are known to every educated person, but there is little (12) to use them at home or in the market-place. Our (13) acquaintance with them comes not from our mother’s (14) or from the talk of our school-mates, (15) from books that we read, lectures that we (16) , or the more (17) conversation of highly educated speakers who are discussing some particular (18) in a style appropriately elevated above the habitual (19) of everyday life. Such words are called "learned", and the (20) between them and the "popular" words is of great importance to a right understanding of linguistic process.

19（）

A.border

B.link

C.degree

D.extent