在三角形ABC中,叫A等于90,AB等于AC,D为BC中点
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英语翻译There was a little girl Who had a little curl,Right in t
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怎么回答What should be done to save the earth?
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I felt very happy when the organizers chose me to be the hos
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如图一,E丶F分别为线段AC上的两个动点,且DE垂直AC,BF垂直AC,若AB=CD,AF=CE,BD交AC于点M,1
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李林甫为相翻译,
