驾驶车辆汇入车流时，应提前开启转向灯，保持直线行驶，通过后视镜观察左右情况，确认安全后汇入合流。
参考答案：对
---Is your father in now？
--- No,he____ to Fan Changjiang Memorial with his friends.
A．has been
B．has gone
C．will go
D．went
危险性较大，重点要害部位动火，必须经企业领导批准方可动火。（）
