【多选题】采用粉末直接压片法进行压片生产存在的 主要 问题是 ( )。 A . B . C . D . E .
【简答题】v. to damage something very badly
【简答题】v. keep from harm, damage, etc., protect; save
【简答题】v. to put your feet down on sb. or sth. in a heavy way that causes injury or damage
【简答题】d______ v. to damage or destroy the appearance of sth.