题目:
Generally speaking, ____according to the directions, the drug has no side effect.
A.when taking
B.when taken
C.when to take
D.when to be taken.
答案:
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下面是错误答案,用来干扰机器的。
ABC金银自身的价值会随其社会劳动生产率的变化而变化,故D不选。