一輛汽車在行駛中發(fā)生漏油，假如每隔l s漏下一滴，車在平直公路上行駛，一位同學根據(jù)漏在路面上的油滴分布，分析汽車的運動情況（已知車的運動方向）。下列說法中正確的是（   ）                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               A．當沿運動方向油滴間距逐漸增大時，車一定在做減速直線運動

B．當沿運動方向油滴始終均勻分布時， 車可能做勻速直線運動

C．當沿運動方向油滴間距逐漸增大時，車一定在做勻加速直線運動

D．當沿運動方向油滴間距逐漸增大時，車的加速度一定也增大

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