冷焦水在使用过程中不需要（）。
A、冷却、除油、循环、补充
B、冷却、循环
C、冷却、补充
D、除油、补充
参考答案：A
—The terrible accident is under investigation.
—Actually, quicker action ______ those workers trapped in the mine.
A．might have saved
B．must have saved
C．should have saved
D．could have saved
RNC操作维护处理板ROMB对应的后插板是（）。
A.RMPB
B.RBMP
C.RMBP
D.RBPM
