连续弯路会影响驾驶员（）。
A.视野
B.视距
C.动作连贯性
D.动作灵敏性
参考答案：A
When it is your turn to talk, what I want to tell you is ______you can show respect by making sure the listener understands ______ you are saying and is interested.
A．that；what
B．this；which
C．where； that
D．which； when
采用RIP协议的路由器，路由更新计时器设为（ ）
A．30秒
B．60秒
C．180秒
D．270秒
