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你能帮帮他们吗

• 如图①，Rt△ABC中，∠B=90°∠CAB=30°，AC⊥x轴．它的顶点A的坐标为（10，0），顶点B的坐标为(5，5

  1年前

• 关于一道定积分的问题设f(x)在[-a,a]上存在连续的二阶导数,f(0)=0,证明至少存在一点ξ∈[-a,a] ,使我

  1年前

• 5.2乘40%+40%x=7.6

  1年前

• Can you see a dog ____(lie) behind the door?

  1年前

• 如图,在矩形ABCD中,AB＝3,BC＝4,P是边AD上一点（除端点A）,过点A、B、P作○O

  1年前

精彩回答

• Can you i_____ what it would be like to live without electricity?

  1年前

• Angry Birds is a video game developed by Finnish computer game developer Rovio Mohile. Inspired primarily by a sketch of stylized wingless birds, the game was first released for Apple’s mobile operating system in December 2009.

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• Carol is my best friend and I trust her most. She is the only person _____ knows my secret.

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• 求方程x(1+y^2)dx-y(1+x^2)dy=0的通解

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• 日本在 1868 年明治维新后走上了“脱亚入欧”之路，其后又走上了疯狂的对外侵略扩张的邪途

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