如图所示一直角斜面体固定在水平地面上左侧斜面倾角为60°右侧斜面倾角为30°.ab两个物体分别系于一根跨过定�轮的轻绳两端且分别置于 Template




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Try and sketch some of theseBubble wrap, Peacock, Ghost, Pattern, Hummingbird, Mountain range, Crab, Marionette, Square dance, Peas, view more ideas


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tomski如图所示一直角斜面体固定在水平地面上左侧斜面倾角为60°右侧斜面倾角为30°.ab两个物体分别系于一根跨过定�轮的轻绳两端且分别置于 coloring