生产作业的技术复杂程度分为（）类型。
A.复杂
B.较复杂
C.一般
D.普通
参考答案：A, B, C
_________ who had arrested him three times for carrying drugs.
A．Before George stood the policeman
B．Before George the policeman stood
C．Before the policeman stood George
D．Before George did the policeman
路由表大小仅取决于（）。
A.互联网中主机数目
B.互联网中网络数目
C.互联网中B类网数目
D.互联网中A类网最大主机数目
