（）不是气压制动系统制动不良的原因。
A.制动总泵、制动踏板行程调整不当
B.空气压缩机传动带打滑
C.制动阀调整不当
D.制动蹄摩擦片占有
参考答案：B
Please give Jim the schedule for tomorrow's conference when he _______ back. He is to chairthe conference.
A．will come
B．came
C．comes
D．is coming
搅拌器启动后的调整和确认内容有哪些？
