—What do you think of your trip to Hainan?

—Wonderful. We were all ________with the ________trip.

A．pleased; pleasant

B．pleasant; pleased

C．pleasing; pleased

D．pleasant; pleasing

CPU工作状态分为目态和管态两种，从目态转换成管态的惟一途径是( )。

A．运行进程修改程序状态字

B．中断屏蔽

C．中断

D．进程调度程序