在CAD网络系统中，以下说法不正确的是（）
A.设计资料可以共享
B.硬件可以共享
C.电脑文件可以共享
D.可以方便管理设计进度
参考答案：C
I didn't see your sister at the meeting. If she ______, she would have met my father. [ ]
A. has come
B. did come
C. come
D. had come
一般情况下，团体结构形成于( )。
A．冲突期
B．规范期
C．形成期
D．结束期
