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【多选题】
2液压泵能吸油与压油的必须具备条件是（ ）、（ ）、（ ）和油箱内液体的绝对压力必须恒等于或大于大气压力。A.
可变的密封容积
B.
吸油腔与压油腔隔开
C.
高压泵
D.
有与密封容积变化相协调的配油装置
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】医药组织市场购买目的是为了 , 生产的规模效应和销售所面对的广大市场范围决定了医药组织市场的购买规模较 。
【单选题】The profit-sharing plan is designed to______the staff to work hard.
A.
calculate
B.
demonstrate
C.
speculate
D.
motivate
【单选题】With whom were the jails and courts overloaded?
A.
With prisoners.
B.
With arrested demonstrators.
C.
With criminals.
D.
With protestors.
【单选题】With whom were the jails and courts overloaded?
A.
With prisoners.
B.
With arrested demonstrators.
C.
With criminals
D.
with protestors.
【判断题】The increase in stroke volume is reflected in increased width of the “ pressure– volume loop ” which demonstrat es changes in intraventricular volume and pressure .
A.
正确
B.
错误
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