纯水就是去掉了水中的全部电解质与非电解质，也可以说是去掉了水中的全部非水物质。（）
参考答案：对
Lisa is a little poor at Chinese. I think she needs_____it every day. [ ]
A. practise to speak
B. to practise speaking
C. practise speaking
治疗三叉神经痛首选（）
A.苯妥英钠
B.卡马西平
C.阿司匹林
D.哌替啶
E.扑米酮
