题干

“珍爱生命,远离毒品”。冰毒是一种毒品,能引发急性心脑疾病,并出现狂躁、暴力、自杀等倾向,其主要成分为甲基苯丙胺(化学式为C10H15N)。下列有关甲基苯丙胺的说法正确的是(   )

A:相对分子质量是82

B:碳、氢、氮三种元素的质量比为10:15:1

C:是由C、H、N三种元素组成的有机物

D:充分燃烧只生成二氧化碳和水

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C

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    Parkour(跑酷)is a sport which trains people to deal with any physical obstacles in their path. It is not a competition but a physical training. A person joining in parkour is called traceur. Traceurs run along a path and use only their bodies to deal with the obstacles in the most efficient way. Parkour pays more attention to efficiency____(make) it different from the similar practice of free running. Parkour____(common) includes running, jumping, climbing, rolling and other similar types of physical movements. Many teenagers think that parkour is quite ____ cool sport. They have great interest in it.

    The ____(invent) of parkour can't ____(give) to one person because many people have worked on it. A French officer developed the earlier form of parkour. The term “parkour” was first introduced by David Belle and Sebastiar Foucan in the early 1980s____ that time, they were two teenagers. This sport ____(become) more popular in the1990s when many films were made on it.

    ____ makes parkour different from other sports is its power to bring people together. It allows traceurs to forget the ____(society) and other problems, and makes a large group work and grow together instead of competing with each other. People can benefit from parkour as it can make them stronger. Still, it also influences one's thought process by improving self-confidence and critical-thinking skills. In this way, parkour allows one to deal with ____(difficulty) in daily life if he or she deals with them through parkour.