如图所示为某质点作直线运动的x T图象关于这个质点在4s内的运动情况下列说法中正确的是 A.质点始终�同一方�运动b.质点先�负方� Template




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tomski如图所示为某质点作直线运动的x t图象关于这个质点在4s内的运动情况下列说法中正确的是 a.质点始终�同一方�运动b.质点先�负方� coloring