用母联开关向空母线充电后,发生了谐振,应如何处理?送电时如何避免发生谐振?
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教师应具备的最基本的审美素养及教师在具体教学活动中落实美育的基本手段是()
A. 批评技能
B. 艺术表现技能
C. 语言审美化技能
D. 课堂审美化技能
室外消火栓距路边不应超过()。
A. 1.0m
B. 2.0m
C. 3.0m
D. 4.0m
卫生器具的1个排水当量相当于()。
A. 0.1L/s
B. 0.2L/s
C. 0.33L/s
D. 0.4L/s
A diesel engines crankcase oil level is found to be too high√ You should suspect that ().
A. the engine was over filled
B. there might be a fuel leak
C. there might be a water leak
D. all of the above