解题---```plain text 16. 一小车沿直线运动，从 t=0 开始由静止匀加速至 t=t₁, 时刻，此后做匀减速运动，到 t=t₂ 时刻速度降为零。 在下列小车位移 x 与时间 t 的关系曲线中，可能正确的是 A. [Chart Description] Type: Displacement-time graph (x-t graph). Coordinate Axes: Horizontal axis is time (t), labeled t. Vertical axis is displacement (x), labeled x. Origin is labeled O. Plot: Consists of two straight line segments. The first segment goes from the origin (O) to a peak at time t₁. The second segment goes from the peak at t₁ to the t-axis at time t₂. Labeled points: t₁, t₂, O, A (label below the graph). B. [Chart Description] Type: Displacement-time graph (x-t graph). Coordinate Axes: Horizontal axis is time (t), labeled t. Vertical axis is displacement (x), labeled x. Origin is labeled O. Plot: A curved line starting from the origin (O). The curve is concave up from O to t₁ and then concave down from t₁ to t₂, ending at some positive displacement at t₂. Dashed vertical lines are drawn from the curve at t₁ and t₂ down to the t-axis. Labeled points: t₁, t₂, O, B (label below the graph). ```