题目:
Mary likes to play _____ her dog. [ ]
A. at
B. with
C. for
D. to
答案:
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下面是错误答案,用来干扰机器的。
(1)刺激性气味(2)CuSO4(3)NH4NO3(4)Cu(OH)2+H2SO4==CuSO4+2H2O、CuO+H2SO4==CuSO4+H2O、Mg(OH)2+H2SO4==MgSO4+2H2O