1、(2009•乐山)如图在梯形ABCD中,DC∥AB,∠A=90°,AD=6厘米,DC=4厘米,BC的坡度i=3:4,动点P从A出发以2厘米/秒的速度沿AB方向向点B运动,动点Q从点B出发以3厘米/秒的速度沿B⇒C⇒D方向向点D
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![1、(2009•乐山)如图在梯形ABCD中,DC∥AB,∠A=90°,AD=6厘米,DC=4厘米,BC的坡度i=3:4,动点P从A出发以2厘米/秒的速度沿AB方向向点B运动,动点Q从点B出发以3厘米/秒的速度沿B⇒C⇒D方向向点D](/uploads/image/z/3189616-16-6.jpg?t=1%E3%80%81%EF%BC%882009%26%238226%3B%E4%B9%90%E5%B1%B1%EF%BC%89%E5%A6%82%E5%9B%BE%E5%9C%A8%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CDC%E2%88%A5AB%2C%E2%88%A0A%3D90%C2%B0%2CAD%3D6%E5%8E%98%E7%B1%B3%2CDC%3D4%E5%8E%98%E7%B1%B3%2CBC%E7%9A%84%E5%9D%A1%E5%BA%A6i%3D3%EF%BC%9A4%2C%E5%8A%A8%E7%82%B9P%E4%BB%8EA%E5%87%BA%E5%8F%91%E4%BB%A52%E5%8E%98%E7%B1%B3%2F%E7%A7%92%E7%9A%84%E9%80%9F%E5%BA%A6%E6%B2%BFAB%E6%96%B9%E5%90%91%E5%90%91%E7%82%B9B%E8%BF%90%E5%8A%A8%2C%E5%8A%A8%E7%82%B9Q%E4%BB%8E%E7%82%B9B%E5%87%BA%E5%8F%91%E4%BB%A53%E5%8E%98%E7%B1%B3%2F%E7%A7%92%E7%9A%84%E9%80%9F%E5%BA%A6%E6%B2%BFB%26%238658%3BC%26%238658%3BD%E6%96%B9%E5%90%91%E5%90%91%E7%82%B9D)
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