简述教学过程的主要矛盾？
形态发生
Refer to the exhibit. Look at the command output. What would be the most probable reason for this port-ID mismatch？（） ["spanning-tree misconfiguration","speed mismatch configuration","cabling problem","configuration problem"]
列车在区间乘降所停车时，无站台处的车厢如无旅客乘降，列车员必须下车。
设备磨损形的两种形式是（）。 ["有形磨损和经济磨损","经济磨损和无形磨损","自然力和人为磨损","有形磨损和无形磨损"]
生命周期消费理论
