冷却器E-110的作用主要是为了防止来自()和()的冷热物料直接混合后出现()。
分配率是指产品中某一成分(密度级或粒度级)的数量与原料中该成分数量的百分比。
A. 正确
B. 错误
During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?()
A. Reduce the pumping rate by closing the deck filling valve
B. Close all overflow valves
C. Place 5 gallon containers under all flange connections in the fuel line
D. Reduce the pumping rate and sound tanks frequently as the level rise
下面哪一艘科考船是我国第一艘远洋科学考察船并于1980年正式从海洋所退役?()
A. 科学号
B. 金星号
C. 科学一号
D. 科学三号