题干
How many people will come to Beijing for the Olympics Games in 2008?
— It's hard to say. _______ people, I think.
A：Million of
B：Millions of
C：Two millions of
D：Two million of
答案(点此获取答案解析）
B
．现高温加热铝粉和氧化铜混合物，使其充分反应．为检验反应后氧化铜是否有剩余，取少量反应后的固体，加入足量稀硫酸，反应后将锌片插入上层溶液中．