英语怎样写作文【一】
英语怎样写作文【二】
the sun rises in the east and sets in the west, which is caused by the rotation of the earth as you all know. but have you ever thought of the effect of the earths rotation on man and can you imagine what would happen if the earth stopped rotating?
the radius of the earth is about 6,370 kilometres. it takes the earth 24 hours to rotate once. objects on the earths equator move with the earth at a speed of 460 metres per second, and the air close to the earths surface turns at the same speed. if the earth stopped rotating suddenly, the air would keep flowing eastward at a speed of 460 metres per second. the wind would be fourteen times as powerful as a hurricane. at the same time sea water would rush eastward at a speed of several hundred metres per second, which might do damages much greater than a seaquake would do. obviously, men could hardly stand such a catastrophe.
even if such a catastrophe would not happen, there would be a great temperature difference on the two hemispheres of the earth, and the four seasons of the year would no longer occur because a day and a night would be as long as a whole year instead of 24 hours. all this would greatly affect the life of human beings, imals and plants and that would cause worse results than anything imaginable.
英语怎样写作文【三】
写说明文必须抓住事物的特征，这就好比写记叙文要抓住人物的
个性一样。什么是事物的特征？事物的特征就是这个事物区别于其他事物的不同之处。因而要抓住事物的特点，这就要从以下三方面入手：一是要细致观察，熟悉说明对象。养过蚕的人来介绍蚕，肯定比没养过的同学容易写好。二是要学会比较。世界上的事物千差万别，不同的事物有不同的特点，即使是一类事物，也各具特征。通过分析思考，学会比较，就能知道所要说明事物的特点。三是要查阅有关资料。说明文要求介绍准确，材料充实，有些说明文还需要查阅有关的资料作补充。介绍《南丰蜜桔》，最好能查阅它的习性、功用等，这样，写作起来就更容易全面把握事物特点，不查阅资料，就很难写全。
