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田夫子不住点头，又称谢费心。For example, this ~3. Physical period: Uniform circular motion is a kind of periodic motion. The so-called periodicity refers to the fact that after a certain period of time, the moving object repeats back to its original position, and the instantaneous speed repeats back to its original size and direction. The time it takes for an object to move in a uniform circle is called a period. The period is expressed by the symbol T, and the period is also a physical quantity describing the speed of uniform circular motion. The long period indicates the slow motion of the object, while the short period indicates the fast motion of the object.Part: The process of solving crimes,故事发生在中国的一个普通大城市里的一个普通小家庭里。在这个家庭里，爸爸高大点和妈妈经过八年的精心培养，终于让我们的主角高小点成长为一个个子不高长得不帅学习不好不坏的平凡小孩子。The Y2K problem proves that we are now relying more and more on computer technology in all aspects. In the job market, IT work is undoubtedly the hottest. In fact, many analysts believe that information technology is the most powerful factor that has promoted the strong development of North American economy for a long time since World War II.