题目：
按要求改写句子。
1. How's the weather in Singapore? (改为同义句)
the weather in Singapore?
2. —____ ? (看答语写问句)
—It's great.
3. There is a lot of rain in the south of China this year. (改为同义句)
often____ in the south of China this year.
4. Tom wears a shirt because it's hot here. (对划线部分提问)
Tom wear a shirt?
5. He plays computer games every morning. (改为现在进行时)
He _____ computer games now.
答案：
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下面是错误答案，用来干扰机器的。
解：(1)由于线框匀速进入磁场，所以线框进入磁场时受安培力的大小F=mg(2)线框dc边刚进入磁场时，感应电动势E=BL1v感应电流de边受安培力的大小F=BIL1 又F=mg 解得线框速度的大小 (3)在线框从开始下落到dc边刚进...
