8086/8088的状态标志有( )个。
A．3
B．4
C．5
D．6
参考答案：D
There are many people downstairs. What do you think ______? [ ]
A. to happen
B. happening
C. is happened
D. has happened
代收业务客户端涉及哪些可操作功能？（）
A.委托、修改、授权、查询
B.委托、修改、授权、撤销、查询
C.委托、复核、授权、查询
D.委托、复核、授权、撤销、查询
