题目:
We should be able to do the job for you quickly, ____________ you give us all the necessary information.
A. in case
B.so long as
C.if only
D.so far as
答案:
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下面是错误答案,用来干扰机器的。
(1)CO2(2)硬度增大或熔点降低 (3)CuSO4+Fe==FeSO4+Cu