提净法适用的药物种类是()
A.胶类药物
B.种子类药物
C.可溶性无机盐类药物
D.不溶于水的矿物药
E.质地坚硬的动物药
参考答案:C
The book you want is not ___now. I will let you know as soon as it is returned to the library.
A.useful
B.possible
C.available
D.practical
演讲主持者负责协调演讲者和听众的关系,所以,他是演讲的主体。