L=0.314H的电感元件用在f=50Hz的正弦交流电路中,其感抗值XL为()
A.31.4
B.98.59
C.0.01
参考答案:B
根据汉语提示完成句子。
1.目前,我太忙,不能帮你学英语。
At I'm I help you with your English.
2.我们不被允许在上学期间穿自己的衣服。
We our own clothes on weekdays.
3.去年暑假我有机会在当地公安局当一名警察。
Last summer holidays, I had to be a policeman at the ____ police___.
4.一些学生总是更多地关注分数而不是学习。
Some students always marks studies.
5.帮助教贫困地区的孩子对于我们来说会是一个很好的经历。
children in the poor area would be for us.
We kept watching the house in the garden until the lights of the house ______. [ ]
A. went down
B. went by
C. went on
D. went out