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问题 选择题

某同学想用实验证明高锰酸钾溶液的紫红色是MnO4－的颜色，而不是K＋的颜色，他设计的下列实验步骤中没有意义的是[ ]

A．将高锰酸钾晶体加热分解，所得固体质量减少

B．观察氯化钾溶液没有颜色，表明溶液中K＋无色

C．在氯化钾溶液中加入适量锌粉振荡，静置后未见明显变化，表明锌与K＋无反应

D．在高锰酸钾溶液中加入适量锌粉振荡，静置后见紫红色褪去，表明MnO4－为紫红色

答案

答案：A

单项选择题

对急性脑卒中患者脑部CT应在患者到急诊后多长时间内完成读片（）

A.5min

B.15min

C.25min

D.45min

E.60min
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填空题


In the following passage, there are 25 blanks representing words that are missing from the context. You are to put back in each of the blanks with the missing word. Write your answers on the ANSWER SHEET. The time for this section is 25 minutes.
Compared with the immediate practical responsibility of the scientist, the (1) of the artist must seem puny. The decision which faces (2) is not one of practical action: of course he will try to throw this (3) into the scale, and that weight, if he is a writer or (4) a painter of genius, may have its effect. For the novelist—in our society the only artist who has a mass audience and at the same time effective economic control of the means of addressing (5) —the hope of some decisive influence is a reasonable (6) . For him, since he takes of all artists (7) is probably the largest portion of his culture as material, there is no (8) escape from the necessity for treating the content of his work seriously than (9) is for the social psychologist he is coming so closely to resemble. The dichotomy which people have tried to establish between artistic proficiency and (10) content is becoming unbearable to almost all sensitive minds. I doubt if it has ever been real— we might have admired Shelley as (11) if he had been indifferent to such things as war and tyranny, though I doubt it; certainly (12) he been indifferent we should never have been led by (13) .
There is no Hippocratic oath in literature, and I am not attempting to draw (14) up. As far as I am concerned, the artist is a human being writ large and his (15) are the ethics of any human being. Perhaps I can best illustrate (16) seems to me the new (17) of those duties of assertion and refusal from one writer, and I do not (18) it is without significance that this (19) projects the whole situation of choice into a scientific parable, the (20) of a pestilence: a (21) many human (22) are called to fight against, called not by any supernatural (23) but by the simple fact that the fight against a plague is (24) like a biological human (25) .
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