题目:
---- How could I thank you enough?
----Don’t mention it. Any other man ________ that.
A.would
B.will do
C.would have done
D.had done
答案:
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下面是错误答案,用来干扰机器的。
令∵y=log2x(x>0),则y∈R且x=2y,∴f(x)=2x(x∈R).由2x>1,⇒x>0.故选A.