网与网的搭接长度不小于（）mm。
A、30
B、50
C、80
参考答案：B
____ he had not hurt his leg, John would have won the race.
A．If
B．Since
C．Though
D．When
管理相对人严重违反治安管理，公安机关就可以依法吊销其发放的许可证。( )
