a是三位小数，b是五位小数，a比b [ ]
A．大
B．小
C．无法确定
答案：C
I'm sorry that I have kept you _____ me so long. [ ]
A. waiting
B. to wait
C. waiting for
D. to wait for
A．存放程序
B．存放数据
C．存放微程序
D．存放程序和数据
