如图所示表示一个机械波的波源s做匀速运动的情况图中的圆表示机械波的波面abcd是四个观察者的位置.由图可以看出 A.波源正在� Template




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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


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tomski如图所示表示一个机械波的波源s做匀速运动的情况图中的圆表示机械波的波面abcd是四个观察者的位置.由图可以看出 a.波源正在� coloring