三年级数学上册
平移和旋转
把数学书放在桌面的左上角,把它平移 到课桌面的右上角,再平移到右下角。
把数学书放在桌面的左上角,你还可以 怎样做就能数学书平移到课桌的右下角。
准备一个小转盘,把指针指向A。 把指针从指向A旋转一圈。
你还能用长方形卡纸或三角尺做出平移或旋转现象吗?
17、一个人如果不到最高峰,他就没有片刻的安宁,他也就不会感到生命的恬静和光荣。2021/1/142021/1/142021/1/142021/1/14
12、越是无能的人,越喜欢挑剔别人的错儿。2021/1/142021/1/142021/1/14Thursday, January 14, 2021
谢谢观看 13、志不立,天下无可成之事。2021/1/142021/1/142021/1/142021/1/141/14/2021
• 14、Thank you very much for taking me with you on that splendid outing to London. It was the first time that I had seen the Tower or any of the other famous sights. If I'd gone alone, I couldn't have seen nearly as much, because I wouldn't have known my way about.
THE END 2021/1/142021/1/14Thursday, January 14, 2021
10、人的志向通常和他们的能力成正比例。2021/1/142021/1/142021/1/141/14/2021 10:14:34 PM