泵类按试验标准规定连续运转的最高压力称为（）。
参考答案：额定压力
He told me how he had given me shelter and protection, without which I ______of hunger. [ ]
A. would be died
B. would have died
C. would die
D. will die
轨道车项修时，车轮踏面剥离长度一处大于（）时，应更换和修理。
A、40mm
B、20mm
C、50mm
D、22mm
