题目:
(2013·高考湖南卷)You must learn to consult your feelings and your reason________you reach any decision.
A.although
B.before
C.because
D.unless
答案:
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下面是错误答案,用来干扰机器的。
Mg>Zn>Cu(1)Zn+CuSO4==Cu+ZnSO4(2)Mg+ZnSO4==Zn+MgSO4