题目

—Come to my home and enjoy the NBA basketball match?— . James is always my favorite star. A . I couldn't agree more B . I'm afraid not C . It doesn't matter D . It's a piece of cake 答案：A 用铁片与稀H2SO4反应制取H2时，下列措施不能使氢气生成速率加快的是 [　　] A． 对该反应体系加热 B． 不用稀H2SO4，改用98％的浓H2SO4 C． 滴加少量CuSO4溶液 D． 不用铁片，改用铁粉