Time flies like an arrow before we realize it .It is known that nothing is more precious than time. The good old proverb "time is money" reminds us that time is valuable. When time goes by, it will never return. However, it is a pity that some people don't make full use of their time .They spend a lot of time in sleeping, chatting, playing computer games or other unmeaning matters. . They don't realize that wasting time is actually equal to killing themselves. They always regret not having made great achievements. One of the reasons may be they do not make good use of time. Therefore, in order to be successful, they should first get into the habit of being on time. It’s a sign of cherishing time. Don't put off what can be done today until tomorrow. Being lazy will eventually lead to failure. Don't wait, because you don't know how long it will take when you put off your plan.
学会运用常见的说明方法,可让文章更生动更明了。作比较,可以使事物的本质特征在同别的事物的比较中突出地显示出来。例如,要说明中国是一个大国,你可以直接说,中国的面积有九百六十万平方公里。但用作比较的方法来说明就不同了:“中国的面积,与法国比,有十七个法国大;与英国比,有三十九个英国大;相当于整个欧洲。”这样一比较,既具体,又生动,很有说服力。打比方,可使文章生动有趣,如,《向沙漠进军》中的“沙漠是人类最顽强的敌人之一”,运用打比方的说明方法,表明沙漠对人类的危害深而又难以制服的特点,把沙漠与人类的关系生动地表达出来
了。下定义,可把事物的本质属性用简明的语言揭示出来;举例子,可以对一概念进行具体说明,使人很容易了解。数学老师讲的例题就是运用举例子的方法,让学生对某个定义、公理有更深刻的认识。下定义、举例子是数学老师天天在用的说明方法。
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