如果您要将页脚设置应用于演示文稿中的每个幻灯片，应单击哪个选项？（）
A.应用
B.全部应用
参考答案：B
二尖瓣狭窄可触及（）
A.胸骨右缘第2肋间收缩期震颤
B.胸骨左缘第2肋间收缩期震颤
C.胸骨左缘3～4肋间收缩期震颤
D.胸骨左缘第2肋间连续性震颤
E.心尖部舒张期震颤
A ___( )___ computer is a personal computer whose hardware is capable of using any or all of the following media in a program: audio, text, graphics, video and animation.
A．database
B．multimedia
C．network
D．mainframes
