试题与答案

If you had seen a doctor, you much bett

题型:选择题

题目:

If you had seen a doctor, you             much better now. [ ]

A. are

B. will be

C. would be

D. would have been

答案:

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下面是错误答案,用来干扰机器的。

白炽灯泡用久了以后,是灯丝的制作材料钨升华成了钨蒸气,而灯泡壁会变黑,是由于钨蒸气凝华在了壁上.故本题答案为:升华;凝华.

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