固定形式印刷品广告是带有什么特征的广告专集?()
A.固定名称
B.固定规格
C.固定样式
D.固定内容
参考答案:A, B, C
To my understanding, a high school graduate has already reached a point in his/her life ______ he/she is supposed to make decisions of his/her own.
A.which
B.where
C.how
D.why
两种溶液中[H+]=1×10-8M和[H+]=1×10-7M,这两种溶液的PH值分别为()。
A、8
B、7
C、10
D、1