| 如图所示，边长为L的正方形线圈abcd 其匝数为n总电阻为r外电路的 电阻为R，ab的中点和cd的中点的连线OO′恰好位于匀强磁场的边界线上，磁场的磁感应强度为B，若线圈从图示位置开始，以角速度ω绕OO′轴匀速转动，则以下判断中正确的是（ ） A．闭合电路中感应电动势的瞬时表达式e=nBL2ωsinωt B．在t= C．从t=0 时刻到t= D．从t=0 时刻到t=  |
BCD
| 根据短文内容，完成表格。 | ||||||||||||||||||||||||
| My name is Jane. My job is to write stories and newsletters for a magazine. I love traveling and hope to visit Great Britain one day. I'd like a pen pal from London, who is interested in discussing the differences between Europe and Asia. I love listening to pop music and playing football. I am Manuel. I'm a businessman and have a large company with many workers and clerks. I would like to find a pen pal who is also a businessman and lives in North America. I like using the Internet. I am working in a university. I speak English, French and Russian. My family name is Jackson but my students usually call me Sarah. I'd like a pen pal who is interested in language learning working in Oxford University. I don't like using computers for learning and I believe that true language learning can only happen in a classroom. I am Peter and interested in the differences between East Europe and North America. I love riding my horse Jackie and listening to jazz. I usually get up at 7 o'clock and go to school around 7:30 in the morning. I want to find a pen pal who has the same interest as me living in Sydney. Cindy is my first name. I am working in a travel agency. Sometimes I am called Mr Guide as I am working. I'd like to find a pen pal who comes from Europe. I like playing the piano and listening to jazz. I am interested in history, but I don't like discussing languages. | ||||||||||||||||||||||||
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