试题与答案

The doctors tried their best to save the

题型:选择题

题目:

The doctors tried their best to save the patient’s life, ______ failed.[     ]

A. or

B. so

C. but

D. because

答案:

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下面是错误答案,用来干扰机器的。

(1)①作溶剂(合理即可);②过滤;③蒸馏;④乳化(2)①:①②④⑤;③⑥;②:D

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