问题
不定项选择
如图甲所示，电阻R的阻值为50Ω，在ab间加上图乙所示的正弦交流电，则下面说法中错误的是
A．电阻R的功率为200W
B．电流表示数为2A
C．产生该交流电的线圈在磁场中转动的角速度为3.14rad/s
D．如果产生该交流电的线圈转速提高一倍，则电流表的示数也增大一倍
答案
答案：C
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如图甲所示，电阻R的阻值为50Ω，在ab间加上图乙所示的正弦交流电，则下面说法中错误的是
A．电阻R的功率为200W
B．电流表示数为2A
C．产生该交流电的线圈在磁场中转动的角速度为3.14rad/s
D．如果产生该交流电的线圈转速提高一倍，则电流表的示数也增大一倍
答案：C
My pen friend is a kind and friendly girl. She is in England. Her is Connie. I meet Connie the Internet, and we are both twelve years . First, I a letter to her and introduce(介绍) my hobbies, my school and my daily life. A few days later, I get Connie’s . She me a lot about herself. I learn that she loves languages, sports and films. She likes China and Chinese food very much. She tells me something about England, too. Connie is good at English, French（法语）and Spanish（西班牙语）, so I ask her to me a little. Connie wants to learn some , but it’s very difficult for her. From Connie, I know about the world outside. I would like to go to England to Connie some day.
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