今天为大家带来的是阅读大使徐凯的《岁暮》

今天为大家带来的是阅读大使吴凌云的《江上渔者》

一代奇才达芬奇

点P(a，b) 关于x轴的对称点是P'(a，-b),关于y轴的对称点是P’(-a，b)点P(a，b)关于坐标原点的对称点是P'(-a，-b)在平面直角坐标系中，P(2，-4)关于x轴的对称点的坐标是_______，关于y轴的对称点的坐标是________。

This podcast topic is now the 4th in a series about Disrupting Thinking by Kylene Beers and Bob Probst. I am continuing to facilitate online discussions with a group of dedicated professionals who are eager to disrupt their own thinking! Here I am reflecting on chapters 7, 8, and 9 which dive more deeply into […]

马德堡半球实验

This podcast topic is the third in a series about Disrupting Thinking by Kylene Beers and Bob Probst. I am really excited about diving into this text more deeply with a group of dedicated professionals who are eager to disrupt their own thinking! For ease, I have divided this text into sections to contemplate. Here […]

方格纸上A、B两点，若以B点为原点，建立平面直角坐标系，则A点坐标为(3，4)，若以A点为原点建立平面直角坐标系，则B点的坐标为_________

拥抱第一象限定理，象限，坐标轴。有序数对：把有顺序的两个数a与b组成的数对，叫做有序数对。记作（a，b）点的表示，比如，点（2，1）

大气压强的发现