明矾除解毒杀虫、燥湿止痒外，还具有 ① 、 ② 作用。
参考答案：①清热消痰 ②止血止泻
This kind of software for English study _____ a lot of students who are weak in oral English.
A． leads to
B． appeals against
C． contributes to
D． appeals to
机会性感染
