问题
单项选择题
在进行高压电力系统短路电流计算时，常采用（）表示电气量，计算简单、方便。
A.标幺值；
B.百分值；
C.有名值；
D.瞬时值。
答案
参考答案：A
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在进行高压电力系统短路电流计算时，常采用（）表示电气量，计算简单、方便。
A.标幺值；
B.百分值；
C.有名值；
D.瞬时值。
参考答案：A
Everyone in our class loves sports. Every morning we get up, we do morning exercises. After the second class, we exercise again. We only have classes twice a week, but we do physical training(体育锻炼) at five every . The most popular is basketball. The enjoy playing it and many of the girls like it, too. Another popular sport is soccer and in every class there a lot of students who like soccer very much. Volleyball is often played when the weather is . We have school teams in basketball, and volleyball. Our teams often friendship matches(友谊赛)with teams from other schools. When there is a match, of us are very excited to go to watch it. Besides(除…之外) ball games, some of us like track and field events(田径运动), we often practice running and others. Every term(学期) we have in these events and once a year we have a meeting. Sports help us to keep and happy. Do you like sports?
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