题目内容

请列举两种制备去离子水的方法。

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郑声可见（）

A. 神识不清
B. 语言错乱
C. 自言自语
D. 声高有力

川芎的功效为（）

A. 活血行气，解郁清心
B. 活血行气，祛风止痛
C. 活血调经，凉血消痈
D. 活血行气，止痛

We can obviously notice that over a period of no practice, what has been learned tends to be forgotten from________________________.

The biggest barrier to sounding the alarm about bird flu is that people usually take flu seriously.