维修费用如果大于设备劣化损失与停机损失,这是()。
A、不用维修
B、维修过剩
C、维修不足
D、维修恰好
参考答案:B
— I'm sorry.I didn't spill the juice on your clothes________.
— Don't mention it. [ ]
A. by accident
B. in this way
C. in general
D. on purpose
简述西域的地理概念。