单项选择题 希望一品红花期提前可采用的方法是（  ） A、多施氮肥 B、进行短日照处理 C、进行长日照处理 D、多浇水

多项选择题 The functions of communication can be summarized as ________.A.communication allows you to gather information about other peopleB.communication helps fulfill interpersonal needsC.communication establishes personal identities D.communication exchanges information rather than understanding emotions and intentions behind the information.

单项选择题 ‏加工箱体类零件的平面时，应选择的数控机床是（    ）。‏