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.
从小到大,我连自己的零花钱都没有,每当看见同学们一个个走进商店买好吃的东西时,我心里痒得受不了,可一摸口袋连一分钱都没有。我实在忍不住就去找爸爸妈妈申请要零花钱,每次都是“无攻而返”,最终,妈妈忍受不了我的“软磨硬泡”,便答应了。我高兴地一蹦三尺高,差点把天花板给撞坏了。
可没过两个星期,我就发现:我还是跟以前一样,一贫如洗,还是个难民。我决定再次抗议,可能父母觉得我长大了,便把我的零花钱交到我的手里,并一再叮嘱不能乱花,而且,一个月只给10元钱,绝不多给。
拿到钱后,我的心里乐得开了花,这以后,我只要看到零食或是玩具,就大手一挥把它给买了下来,不出3天,我又变得和以前一样了。
我后悔的不得了,就下定决心,以后一定要好好克制自己,把钱攒起来。从那以后,每当零花钱发下来时,我都把它们放在一个小袋子里,可有些时候看到别人买东西时,手就暗暗发痒,每当这时,我就告诫自己,不能买,然后装做没看见一样,快步走。
四川发生地震后,我们学校开始捐款,那天放学后,我呆呆地望着袋子里的钱,到底是捐还是不捐,捐了的话,这几个月我辛辛苦苦攒下来的钱都化为空气;不捐,心里又感到不安,思考再三后,最终,我选择了前者。
当我将钱放进暮捐箱时,心里感觉一阵轻松。我觉得,钱虽然重要,但不能与爱衡量。
从小学二年级起,每天妈妈都给我1元零花钱,妈妈对我说:“给你的零花钱,不要乱花哦,好吗?”我听了,满口答应了。
我每天用五角,把剩下的存入小盒里。有一天,老师对我们说:“同学们,今年陕西省有一所小学受灾了,我们学校组织了‘手拉手,献爱心’活动,希望大家积极捐钱。”中午回去后,我打开小盒子,一数里面的钱,正好20元,我一口气跑到了学校,把钱交给了老师,老师还表扬我是一个好学生。
几个月后,南莫镇新华书店工作人员在我们学校科学宫,举办了书市活动。走进科学宫,啊!这儿的书真多,有《马小跳系列》,有《十万个为什么》,还有《西游记》等等,书太多了,我看得眼花缭乱,真想把这些全买回去,可我只带了20钱,我便买了8本作文书。看着看着,我看见了《小学生成语故事》这本书,我一看价钱,呀!一套要44元,吓我一跳,这么贵呀!放学后,爸爸问我:“你哪儿来的钱买书?”我把事情一五一十地告诉了爸爸,原来是这样:我把每天存的钱拿出来买的书。我还把想买《小学生成语故事》这本书也说了出来。爸爸听了,从包里拿出50元钱,递给了我,对我说:“去买吧,就算给你的一点奖品。”我自豪地对爸爸说:“我不要你的钱,我要用我自己的零花钱!”爸爸开心地笑了。
晚上,睡在床上,我想:“零花钱啊!你不仅让我学了知识,还让我养成了存钱的好习惯。
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