目前微机使用的主流操作系统属于（）。
A.批处理操作系统
B.分时操作系统
C.实时操作系统
D.网络操作系统
参考答案：D
— If I _____ Barack Obama, I ______ to receive the Nobel Prize for Peace.
— Really? Why?
[ ]
A. were to be; do not go
B. am; will not go
C. were; would not go
D. would be; were not to go
双：手
A．朋：友 B．林：森 C．明：暗 D．是：非
