液态烃泵冲洗油中断，导致腔内温度升高，液膜的润滑性降低，密封端面被推开或产生干摩擦，产生泄漏。
参考答案：对
在等腰△ABC中，AB=AC=14cm，E为AB中点，DE⊥AB于E，交AC于D，若△BDC的周长为24cm，则底边BC=（ ）。
翻译
1.她是一个相貌好看的女孩。
She is a girl.
2.房间里只有三个人。
There are only three in the room.
3.那儿有许多人。
There are many there.
4.他是一个少言寡语的人。
He is a of few words.
5.瓶子里有点水。
There is water in the bottle.
=There is water in the bottle.
