题目

为了出去铁粉中的少量铝粉,可以选用的试剂是(   ) A . 稀盐酸 B . 稀硫酸 C . 氯化铜溶液 D . 氢氧化钠溶液 答案:DThat kind of animals________ until quite recently. [  ] A.appeared in the wild B.appeared to the wild C.didn’t appear in the wild D.didn’t appear to the wild
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