Read and change. (按要求改写句子)

1. I can play the piano. (改为疑问句)

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2. I will promise to write to you. (改为疑问句)

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3. We are going to go to America. (就画线部分提问)

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4. I am very well. (改为同义句)

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5. I can go to the party with my friends. (改为否定句)

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电子显微镜按工作原理和用途的不同可分为（）和（）。