题目

Mr Smith was a wealthy industrialist, but he was not satisfied with life. He did not sleep well and his food did not  21   with him. The situation lasted for some time. Finally, after a   22   of sleepless nights, he decided to consult his doctor. The doctor advised a change of  23  . “Go abroad,” he said, “But I’m not good at foreign languages,” said Mr Smith. “It doesn’t matter,” said the doctor. “It won’t   24   you to talk a little less. Go on a voyage. Take plenty of exercise. Try to reduce your weight,  25   rich food.”        Mr Smith went to1．如图所示是某同学用打点计时器研究小车做匀变速直线运动时得到的一条纸带．图中A、B、C、D、E是按打点先后顺序依次选取的计数点，相邻计数点间的时间间隔T=0.1s．由图中的数据可计算得出，打C点时小车的速度大小是0.21m/s，小车运动的加速度大小是0.60m/s2．（计算结果均保留两位有效数字）