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In real life, Li Lei faced such a choice. In 2012, my father was diagnosed with advanced cancer. Until the last day of his father's life, Li Lei chose "active treatment".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.System Launcher, screen lock key, caller ID and other system applications芭比是时尚偶像，她的家富丽堂皇，好朋友们和完美先生都为她着迷。 她样样精通，却依然谦逊而亲切，她不断鼓励她的朋友们直面任何挑战。Raquelle 大胆畅想，野心勃勃，总是想超越芭比。(1) Having obtained the first-class qualification for more than two years, and having no record of illegal practice within two years prior to the date of application;当奥托家族迎来新纪元时，凯蒂和格雷格做出了出售家庭小货车的情感决定；丹尼尔遭遇挫折，迫使他重新思考如何实现自己的目标。