输送结晶液体，泵停转后必须将泵出入管道用蒸气扫通，避免堵塞。
参考答案：对
It's my mother _____ gives me my pocket money, and she's the person _____ camera I nearly lost.[ ]
A. whose, who
B. whose, whom
C. who, whose
党的十六大提出，贯彻“三个代表”重要思想的关键在于坚持（）
A．与时俱进
B．求真务实
C．立党为公
D．执政为民
