如果滑油箱通气管路堵塞对滑油压力有什么影响？（）
A.无影响
B.压力增加
C.压力减少
D.压力摆动
参考答案：B
The manager said that they had an _____ plan if the plan they had submitted was not accepted.
A．alternate
B．alternative
C．absolute
D．appreciable
清半夏的炮制方法（）
A．白矾水溶液浸泡
B．生姜汁浸泡
C．甘草液浸泡
D．石灰液浸泡
E．酒制
