Which of the following statements is true concerning an oil cooler?()
A. The oil temperature is less than the cooling water temperature
B. The oil pressure is less than the cooling water pressure
C. The oil pressure is greater than the cooling water pressure
D. The oil flow control valve is always installed in the oil input line
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汽油机与柴油机各有哪些优缺点?为什么柴油机在汽车上得到越来越普遍的应用?
岩石是天然产出的由一种或()(包括火山玻璃、生物遗骸、胶体〕组成的()。
护士为患者输血时,发现输血袋破损漏血现象,即与血库联系退换事宜,属于()
A. 前馈控制
B. 过程控制
C. 反馈控制
D. 质量控制
E. 预防控制
每一级被压缩后的气体,压力(),温度(),质量(),体积(),密度()。