在一个域内，mst的配置说法错误的是（）.
A、域名要相同
B、映射要相同
C、修订号要相同
D、优先级要相同
参考答案：D
As I will be away for at least a year, I’d appreciate from you now and then me how everyone is getting along.
A．hearing; tell
B．to hear; tell
C．hearing; telling
D．to hear; to tell
吸烟者吐出的烟雾，从纸烟、雪茄或烟斗中冒出的烟，被称为：（）
A.一手烟
B.二手烟
C.三手烟
D.四手烟
