汉信码支持GB18030中规定的（）个汉字信息字符。
A、120万
B、48万
C、256万
D、160万
参考答案：D
We _ not to go to that road because it _ . [ ]
A. were told, was being repaired
B. told, was being repaired
C. were told, was repair
下列路由器协议中，（）不用于AS之间的路由选择。
A.RIP
B.OSPF
C. IS～IS
D.BGP
