电动机正常工作时，将电能转化为人们需要的______能．
电动机正常工作时，将电能转化为机械能．
故答案为：机械．
If you want to study in foreign countries, ____ good knowledge of the culture is regarded as ____ must for you to live happily.
A．/; /
B．a; a
C．the; the
D．the; a
旅游消费的学习
