汽动给水泵的启动参数允许值：高压：（）MPa温度（）℃；低压：（）MPa温度（）℃。
参考答案：16.7；538；0.66；333.5
家庭结构定义
John was________to learn the news that he was rejected by the committee.[ ]
A．cast down
B．cast off
C．cast about
D．cast away
