柴油机对机油进行强制冷却的部件是()。
A、机油冷却器
B、冷却塔
C、中冷器
D、油底壳
参考答案:A
During the famine, many people were ______ to going without food for days.
A.sunk
B.reduced
C.forced
D.declined
离心泵开泵时要先开()后开()。