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如(x - 0)^2 + (y - 0)^2 = r^2 要写成x^2 + y^2 = r^2 还有 + -要处理,如: 4+ -3写成4-3 ,4- +3写成4-3In Reply To:0怎么处理？？ Posted by:cjqiu at 2008-12-21 13:56:30 Followed by: Post your reply here: |
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