如图所示,钓鱼竿在使用的过程中,利用了杠杆知识。在杠杆上a、b、c三点中,支点是 点,动力作用点是 点,阻力作用点是 点。若动力臂跟阻力臂之比 Template




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Try and sketch some of thesePinball machine, Corner, Temple, Atlatl, Ambulance, Hockey mask, Planet, Dynamite, Mountain goat, Stapler, view more ideas


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tomski如图所示,钓鱼竿在使用的过程中,利用了杠杆知识。在杠杆上a、b、c三点中,支点是 点,动力作用点是 点,阻力作用点是 coloring