数字出版业务活动平台化的特征不包括（）。
A.内容编辑加工的平台化
B.产品及服务发布的平台化
C.分销的平台化
D.资本运作的平台化
参考答案：D
I want to wash my hair ,please buy some ______ for me .
A. bathing suit B. shampoo C. medicine
Studying in groups is necessary _________________ you want to do well in school.
A．if
B．until
C．unless
D．though
