全等.∵1s后,BP = 3CM,则PC = 8-3 = 5cm,又CQ = 3cm,D为AB的中点,则BD = 5cmAB = AC,则∠B=∠C∴△BPD≌△CQP若△BPD≌△CQP,除了上述的情况外,还有一种就是BD = CQ,BP = CP∴BP = 4cmP的运动速度为3cm/s则此时,P运...