【单选题】Ships at sea are in urgent need of MSI because they are _____ various kinds of dange.
【单选题】Generally speaking, if ______ strictly following the instructions, the electric bike is not as dangerous as reported.
【简答题】通用变频器按变换环节分类可以分为( )和( )。
【单选题】The tiger, once a __ __ animal to humans, is now ____ of disappearing on the earth.
【简答题】The disadvantages associated with automation are ______ and ______ and its potential ers.
【单选题】变频器的分类按变换环节可以分为:
C.
U/F压频比控制变频器、SF转差频率控制变频器、VC矢量控制变频器