救命的～快点～谢谢！！
Stars twinkle for the same reason that the air shimmies above a radiator or a fire or hot pavement; because of warm air rising in the atmosphere.
Heat can move in one of three ways. The first is conductance. In conductance, the heat passes through something solid, such as wood or metal. This process is pretty slow.
Another way heat moves is radiation. In radiation, the heat passes directly through space in the form of photons, tiny packets of energy travelling at the speed of light. Radiation is the way that the sun's warmth reaches Earth.
Finally there's convection. In convection, heat warms the air. The warm air becomes less dense (and thus lighter) than the cool air around it, so it rises. Convection is the reason stars twinkle.
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using English consists of speaking English and writing compositions in English .in order to improve your spoken English,
you'd better take an active part in the teacher's lectures,answer
his question in english ,and try to speak as much English as you
can after class. writing English journals is the best way to improve your writing. at the same ,you should listen to ang more English
參考答案:星星闪烁是由于空气的流动，空气因为热辐射、火或是炙热的人行道产生的热量使其升到大气层中。
热的传递有三种途径。第一条是热传导。热量通过固态物质进行传导，如木头或金属。热传导是十分缓慢的。
另外一种热量传导途径是热辐射。热量以光子的形式直接穿过空间进行传导，这种微小的能量包以光速传导。太阳的热量传递到地球就是通过热辐射的方式。
最后一种方式是热对流。空气就是以对流的方式传递热量的。热空气比起周围的冷空气来讲具有较小的密度，因此热空气会上升。对流也是星星闪烁的原因。
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英语的使用包括读和写。为了增强你的口语，你最好积极地参加每一次英语科，并回答老师的问题，尽你所能用英语来表达。用英文写日记也是提高英文写做水平的最好的方法。同时，你应该去听更多的英语。
