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.
If I ruled the world, I would do some changes that will make the world become better. I would publicize concept of peace, and try to reduce wars. I would also try my best to reduce taxation, help poor people with their producion and make business revive. I would change education too, because it is said that the fature of a country depends on children of the country. In a way, the future of the world depends on children of the world. So I think, the education is a very important factor to make the world become better. I would reduce class-time, reduce homeworks and build many appliances for play on the playground. I would make the schools become a kind of place that kids can be happy there, and like there. I would definitely be a good leader. If somebedy gave me honor to rule the whole world, I wouldnt let him(her down. I would do anything I can do to make the world become more beautiful, more peaceful and warmer.
下面谈谈学习毅力的.问题。如果你有坚强的毅力,那么世界上就没有什么难事。学英语关键是能够持之以恒。
在学习过程中,你应该制订一个计划,一天记住几个单词,一天记住一两个句型。你不要小看“持之以恒”的力量。举个例子:
如果你一天背5个单词一年就是1825个单词,相当于初中三年再加高中一年零两个月的词汇量。如果你坚持两年你就能住3650个单词,相当于中学六年包括本科两年的词汇量。
在制订计划时要遵循以下几项原则:
1、计划要切实可行,不要好高务远。上面的例子已经说明,只要你能坚持天天学习,英语一定能学好。
2、要有坚强的毅力,每天都学习,不因为某些事而耽误了学习。如果哪天的工作没有完成,第二天一定要补上。连续不学习的时间不要超过两天。
3、要有一个帐本,哪天学会了哪几个单词,哪几个句型一定记录在案。
4、为了把单词、句型真正学到手,第二天一定要复习第一天的,第三天一定要复习第二天和第一天的内容。
5、所选择的课本可以是一套或两套,千万别太多。实际学英语的书没有什么好坏之分,只要你能按照一套或两
这天,我和爸爸从鱼店里买了六条金鱼回来,三条红三条白。我把三条白金鱼分别叫“鸡冠花”“火帽子”“丹顶鹤”,三条红金鱼分别叫“金牡丹”“红将军”“太阳光”。看到它们都有了名字,我高兴极了。
10月3日 星期五
今天我回家,看见金鱼们在嬉戏。我刚把脸凑过去,它们便四处游开,个个躲在鱼缸底瑟瑟发抖,“金牡丹”还撞到了缸上。哈哈!看来它们还有点怕我!
10月4日 星期六
今天,我见金鱼们一动不动地趴在鱼缸底,想:它们可能饿了。于是便撒了点鱼食。果然,它们立刻“嗖”地有了上去,狼吞虎咽地吃起来,那场面真是有趣!
10月6日 星期一
这一天,我见金鱼缸里少了一条金鱼,原来是“鸡冠花”,我问过爸爸后,知道是因为前天喂太多了,昨天撑死了。我听了有点难过,但毕竟还有五条金鱼,以后我得好好饲养它们了。
10月11日 星期天
这个万里无云的日子里,我看见金鱼玩耍的样子
了。它们就像玩“老鹰捉小鸡”、“丢手绢”一样,一会儿聚在一起,一会儿把头探出水面,互相追逐,鱼缸顿时像游乐场一样欢快。
10月16日 星期五
晚上,我看见“丹顶鹤”和“红将军”睁着眼睛,躲在水底,好久也不动。正当我思索它们在干嘛时,忽然想起:书上不是说金鱼是睁开眼睡觉的吗在、看来这就是金鱼睡觉的样子了。我又有了新发现!
农夫放下锄头眨下眼睛,再用手挠下头皮,越看眼前的这个家伙越不顺眼。
“朋友,你仔细想想呀,”蛇仍然耐心地解释着,“老鼠是个小恶魔,在家中嚼你们的衣服咬你们的柜子,偷你们的粮食还传播不少的病茵,搞得你们昼夜不得安宁;老鼠也是个小强盗,在地里咬坏你们的庄稼偷你们的硕果,糟蹋你们的土地挖你们的水坝,坝要决堤这是人命关天的大事,我把这种坏家伙吃掉有百利而无一害,有什么不好?难道我不是你们的朋友?嗯!”
农夫听了蛇的叙说后却哈哈大笑,笑完才说:“这些我知道,都是‘小事’一桩,老鼠能毁水坝?那水坝有几百亩地大它能毁得了吗?”
蛇说:“俗话说得好,千里之堤毁于蚁穴,蚂蚁那么小的洞就能毁千里之堤,老鼠为什么不能呢?”
农夫说:“你过于夸大其词,我看到的'却和你说的正好相反:去年我在这里种得高粱田鼠不光没吃,我在它窝里还挖出了一筐带皮的花生,它对我有何害处?再说你们蛇,还偷吞我家的两个鸡蛋,它哪里好?”
蛇并不否认农夫的话,蛇吃鸡蛋这只是偶然事件,老鼠犯罪却是每时每刻:只所以田鼠没吃你的高粱是因为它够不到,至于它窝里的花生,你和田鼠虽然得了利,但是
损害了别人,是损人利己不道德的行为,难道还不该谴责吗?”
农夫来气了,蛇偷吃我家的鸡蛋还谴责我?其有此理!说着他抡起锄头就冲蛇砸去!幸亏蛇对这种科学文盲的人早有准备,顺着草地飞快地逃跑了……
动物跟人一样,都需要休息,而且大部分的动物和人睡觉时都会闭上眼睛。可是,你见过金鱼闭上眼睛吗?我想你肯定没见过。
那是不是金鱼不睡觉呢?当然不是,金鱼和我们一样,它也会睡觉,只是我们不容易察觉而已。
其实,金鱼在水中不动时,就是在睡觉,只是因为鱼没有眼睑,所以不会闭眼,看上去就像不睡觉一样。
鱼也有各种各样的睡觉方法。仔细观察我们饲养的金鱼,你就会发现,它们到了夜晚,就会躲到鱼缸内的小假山、水草间等暗处一动不动,这就是金鱼睡觉时的状态。鱼不像人那样有眼睑,在睡觉时能够闭上眼睛。因此,要想看到金鱼睡觉还真不是件容易的事。
除了金鱼,人们还了解到了其他一些鱼类睡觉的状态。如花海猪鱼、细拟隆头鱼、锦鱼等,它们都在海洋底部生活,当夜色来临时,它们就会钻进沙子里,一动不动地睡大觉,这样既安静又能有效地防止天敌的伤害。还有一些鱼如裂嘴鱼、南洋鹦嘴等,它们的身分泌一种特殊的'胶状物质,要睡觉时它们就像小孩子一样吹个大泡泡,胶质的泡泡遇水后会硬化,它们就钻进那个泡泡里,只在嘴边留个小孔,就像在睡袋里一样。
在淡水里生活的鱼大多跟金鱼一样,躲在岩石后、水草间等暗处睡觉。像鲤鱼、鲫鱼会钻进水草里睡觉,而鲻鱼、鲷鱼则在岩石后面睡觉。
有趣的是,还有些鱼类睡觉的时候不需要停下来,像有洄游习性的鱼就能够一边游泳一边睡觉。如金枪鱼、鲭鱼和嘉鱼,不管白天晚上都在不停地游动,使得我们很难弄清楚它们什么时候是在睡觉,什么时候是清醒的。
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