题目

The owner of a large company，who was about to take a trip overseas，dropped into his office early in the morning to make some arrangements．He was telephoning for a ticket for his trip when the night watchman came in，who was back from work，and said“Good morning”to the owner．Then he told him that he had dreamed that very night of the owner’s plane crashing after take-off．The owner was surprised to hear this．He decided，however，there was something in what the night watchman said．He put off  his trip． As things turned out，the night watchman's dream was correct10．如图所示，汽车用跨过定滑轮的轻绳拉动物块A．汽车匀速向右运动，在物块A到达滑轮之前，关于物块A的下列说法正确的是（　　）A．将竖直向上做匀速运动B．将竖直向上先加速后减少C．竖直向上运动且加速度越来越小D．将处于失重状态