一个小球自由下落碰到桌面后又以原速率向上弹起,则下图中能正确反映这一过程的速度图线是( )(设竖直向上为正方向)
答案：D
My daughter will _____ you one day only if you keep ______ like this.
A．receive; performing
B．accept; performing
C．receive; to perform
D．accept; performed
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