题目

 You’d better change another book because ___page of the book is torn, and ______cover looks old. A. the; the     B. a; a        C. a; the        D. the; a 答案:C下列各组物质中,可用溴水溶液来鉴别的是(  ) A、甲烷与乙烷B、乙烯与丙烯C、苯与己烷D、苯与溴苯
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