离心泵关闭出口伐运转时间不宜过大，否则会引起不良后果。
参考答案：对
The police got to an old school _______the farmers used as a store.
A．that
B．what
C．where
D．when
石灰乳化沥青是一种可在潮湿基层上冷施工的防水涂料。( )
