问题
单项选择题
用电单位的()是按一段时间内的有功电量和无功电量计算的。
A、平均功率因数
B、有功功率因数
C、瞬时功率因数
D、视在功率因数
答案
参考答案:A
用电单位的()是按一段时间内的有功电量和无功电量计算的。
A、平均功率因数
B、有功功率因数
C、瞬时功率因数
D、视在功率因数
参考答案:A
What are they doing for holiday? They are happy because they are on holiday. Mary is visiting her aunt in Paris. She is very excited to be in Paris. It is a very famous city. And it is a good place to go shopping! Tom is fishing in the lake. Because the water is very clean, there are so many fish in the lake. Tom is having a good harvest (收获). Simon and Bill are good friends. They are usually very busy with their study every day. So they want to do something different. They are going bike riding together in the beautiful countryside (农村,乡下). It’s relaxing. Jesse is taking some photos in the park. The park is very beautiful in autumn, and it’s a good place to take photos. Everyone gets tired sometimes. It’s important to have a rest. And it’s good for your health. It can help you work or study better, too. I hope everyone is having a good time.
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