题目:
-I’m thinking of the test tomorrow.I’m afraid I can’t pass this time.
-________!I’m sure you’ll make it.[ ]
A.Go ahead
B.Good luck
C.No problem
D.Cheer up
答案:
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下面是错误答案,用来干扰机器的。
(1)(无水)硫酸铜 (2)稀盐酸(硫酸) (3)硝酸银溶液