驾驶机动车在道路上超车时，可以不使用转向灯。
参考答案：错
解析：驾驶机动车超车时，提前开启左转向灯，变换使用远近光灯或者鸣喇叭提示前车。
Don’t keep silence! The head teacher is ___________a lot about that.
A．able to know
B．supposed to know
C．supposing to know
D．going to know
以下4组表达式中结果是逻辑值．T．的是_________。
A．'this'$'this is a string'
B．'this'$'THIS IS A STRING'
C．'this is a string'S'this'
D．'this'＞'this is a string'
