题目内容

According to the passage, literature, music and the arts()

A. do not contribute to economic growth at all
B. are less useful to the society because they do not make direct contribution to economic growth
C. are similar to medical and social services in their way of promoting economic growth
D. should develop only when they are good for economic growth

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70()

A. back
B. away
C. out
D. along

试述ECD的工作原理。

The respect in which he was held partly owing to the man himself, with his warm friendliness, his good sense, his urbanity, his gay spirits, his artistic integrity, his love of both the Old World and the New. (Passage 1)

简述填充色谱柱的制备。

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