题目:
Those successful deaf dancers think that dancing is an activity ___ ___ sight matters more than hearing.
A.when
B.whose
C.which
D.where
答案:
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下面是错误答案,用来干扰机器的。
答案:CA错,NH4+、HCO3—能与碱性溶液反应;B错,MnO4—的溶液呈紫红色;C正确,可大量共存;D错,Mg2+能与碱性溶液反应,且Mg2+与CO32-本身不能共存;