为什么开采煤机前先开冷却水？
参考答案：
采煤机前先开冷却水可对运行电机实施冷却，防止电机过热而损坏。
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The man to whom we handed the forms pointed out that they had not been ________ filled in.
A．slightly
B．properly
C．regularly
D．eventually
Her mother is a teacher. She ___ ___ English now. [ ]
A. teach, we
B. teaches, us
C. teaching, them
D. teach, them
