驾驶机动车要选择绿色箭头灯亮的车道行驶。
参考答案：对
解析：绿灯行，没有问题。
.It is said that if a mirror is broken for no reasons, bad luck is likely to strike, but I really __________ it.
A．doubt
B．believe
C．think
D．support
在串行链路封装协议中，能够提供网络安全验证的协议是（）
A.HDLC
B.PPP
C.LAPB
D.SDLC
