电动机是把电能转化为______能的机器.
电动机通过通电线圈在磁场中受到力的作用,从而使线圈在磁场中旋转,是将电能转化为机械能的机器.
故答案为:机械.
The way children learn about the world is _______ that of grown-ups — the former by eyes while the
latter by sense.[ ]
A. anything like
B. feel like
C. nothing like
D. something like
风险具有普遍性、客观性、可测性、不确定性、发展性的特征,其中最基本的特征是( )。
A.发展性
B.可测性
C.客观性
D.不确定性