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.
早上一起床,爸爸就说:“我们出去旅游吧。”我说行,妈妈说:“去少华山吧。”于是我们快快吃了些东西后就出发了。
在车上妈妈告诉我从渭南到华县有半个小时的路程。可是到华县我们用了40分钟,妈妈说这还没到少华山。我们继续坐车过了不长时间就到了少华山。这里旅游的人特别多,有卖小吃的,也有卖纪念品的。卖票处熙熙攘攘的人群向前簇动着。妈妈终于买来了四张票,两张门票两张车票。原来那两张车票将我们要送到旅游景点的。
于是我们进了大门就上了一辆车。车上面刚好有三个座位,我们都坐车上山了。车子一到目的地后,我们急步可待的下了车,我们一边欣赏眼前的自然风景,一边上山。忽然爸爸说他走不动了,就坐下来等我们。我和妈妈继续爬山。越到山上面,越是险峻。我们终于登上山顶,在山顶往下看,大树变成了小草,走动的人们像彩色的蚂蚁一样在蠕动。
我和妈妈下山下来的路上,看到爸爸还在那里坐着等我们。我们就一起下山,很快到了山脚下,妈妈说:“你能用一首诗描绘一下少华山吗?”我想了一下,就背了一首诗:空山新雨后,天气晚来秋;明月松间照,清泉石上流。妈妈说这首诗很好。要是将明月改成阳光就更恰当了。
我们坐车回到家的时候,天色已经暗了下来。我感觉到很累,可是心里充满了胜利的感觉,兴奋极了。
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