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暴雨强度公式:x=−b±b2−4ac2a.x = {-b pm sqrt{b^2-4ac} over 2a}.x=2a−b±√b2−4ac勾股定理:c2=a2+b2c^2=a^2+b^2c2R...- admin
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暴雨强度公式:x=−b±b2−4ac2a.x = {-b pm sqrt{b^2-4ac} over 2a}.x=2a−b±√b2−4ac勾股定理:c2=a2+b2c^2=a^2+b^2c2R...发布于
the flower that blooms in adversity is the most rare and beautiful of all.发布于
And the universe will open doors for you where there were only walls.