问题
单项选择题
直流电机电枢绕组元件的电势是（）电势；电枢绕组元件的电流是（）电流。
A.直流；交流
B.直流；直流
C.交流；交流
答案
参考答案：C
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直流电机电枢绕组元件的电势是（）电势；电枢绕组元件的电流是（）电流。
A.直流；交流
B.直流；直流
C.交流；交流
参考答案：C
Do you often watch TV? Maybe your 1 is “Yes”. Most children like watching TV 2 it’s interesting and relaxing. They can also learn a lot and know 3 things about their country and the world. TV helps to open children’s eyes. TV can open 4 mind. They can learn some better ways of 5 things. Many children are always 6 with their studies, so they watch TV only on weekends. 7 some children watch TV every night. They go to 8 very late and they can't have a good rest. I 9 it’s good to do so. What do you 10 it?
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