两面性事物作文就是仿照五年级上册《假如没有灰尘》啦,比如说人类生活离不开水,但水多了也会引发洪水之类的.

"There are two sides to every question: my side and the wrong side."
- Oscar Levant
每个问题都有两个方面：我的一面和错误的一面.
- 奥斯卡·莱文特
Every street has two sides, the shady side and the sunny. When two men shake hands and part, mark which of the two takes the sunny side; he will be the younger man of the two.
- Bulwer-Lytton, Edward G.
每条等都有两面,荫面和阳面.两个人握手并分开时,如果能知道两个人谁站在了阳面；他将是两个人中更年轻的一方.
- 英国作家爱德华·鲍沃尔·李敦
“Peace and justice are two sides of the same coin.” (Dwight d. Eisenhower)
和平与正义是同一枚硬币的两个面.
- 美国总统艾森豪威尔
“Our language has wisely sensed the two sides of being alone. It has created the word 'loneliness' to express the pain of being alone. And it has created the word 'solitude' to express the glory of being alone.”
- Paul Tillich
我们的语言让人感到孤独的两个方面.它创造了“寂寞”这个词来表达一个人独处是时的痛苦.它同时还创造了“孤独”这个词,来表达孤独的辉煌.
- 保罗田立克

解题思路：（1）工业上用一氧化碳还原氧化铁炼铁，主要是利用CO的还原性，在高温下和氧化铁反应生成铁和二氧化碳，写出反应的化学方程式即可；根据一氧化碳中毒的机理进行分析解答．
（2）铁在空气中锈蚀，实际上是铁跟空气中的氧气和水共同作用的结果．

（1）工业上用一氧化碳还原氧化铁炼铁，主要是利用CO的还原性，在高温下和氧化铁反应生成铁和二氧化碳，反应的化学方程式为Fe₂O₃+3CO

高温
.
2Fe+3CO₂．
一氧化碳能与人体血液中的血红蛋白结合，使血红蛋白不能很好地与氧气结合，从而使人体缺氧而造成“煤气中毒”．
（2）铁在空气中锈蚀，实际上是铁跟空气中的氧气和水共同作用的结果，则钢铁制品在潮湿的空气中易生锈；
生铁是含碳量为2%～4.3%的铁合金，而钢则是含碳量为0.03%～2%的铁合金，钢和生铁都是铁与碳元素形成的合金，生铁和钢的主要区别是含碳量不同．
故答案为：（1）Fe₂O₃+3CO

高温
.
2Fe+3CO₂；血红蛋白；（2）潮湿的空气；碳．

点评：
本题考点： 铁的冶炼；一氧化碳的毒性；生铁和钢；金属锈蚀的条件及其防护；书写化学方程式、文字表达式、电离方程式．

考点点评： 本题难度不大，掌握工业上炼铁的反应原理、一氧化碳的毒性、铁锈蚀的条件、生铁和钢的区别等是正确解答本题的关键．

你的回答完美的解决了我的问题，谢谢！

It's very convenient to go shopping on the Internet,and we can go shopping at any time. 24 business hours, no queue, but can't see the goods and enjoy the shopping fun with friends.And can't to ensure thequality. 本人英语不大好,如果语法错了请纠正

Everything has dual character, different people have different opinions about pressure.或者Everything has tow sides in essence, and so does chemistry.
或Everything has tow sides in essence,and chemistry is no exception.

Everything has two sides,such as Lin Dan's domineering,something easy to be anger,but also is the domineering made every one of his success.

成也萧何,败也萧何
失败是成功之母
苦尽甘来
经过漫漫长夜才会拥抱灿烂的黎明
走过茫茫的雪原,才知太阳的炽烈

灰尘的作用告诉我们,任何事物都有它的两面性,即使是一些被人们看成是“废物”的东西,往往也有其不容忽视的存在价值.
灰尘虽然污染空气质量,但是能通过阻挡紫外线等太空射线直射保护地球.然而如果人们不注意保护环境,不加禁止的砍伐我们赖以生存的地球,则又令荒漠和沙尘无休止的蔓延,这对世界来说是个致命的打击.

这句话有很多种表达方法：
every coin has two sides
everything has two sides.
every thing has two handles
还有一种是：
be a two edged sword,比如：
Computer can be a two-edged sword.

（1）造福于人类的例子：亚热带气候雨热同期,适合种植水稻
（2）给人类带来灾难的例子：地中海式气候降水集中在冬季,夏季降水少,不利于植物生长,夏季还有热浪侵袭.

First of all I want to introduce myself, my name is Xiaobing,I think every coin has two sides.
We should grasp the key points and can't do things blindly.

要是我写的话,我就写生与死,就像是落叶作为肥料,明年才会长出丰收的果实

对

√

事物的发展变化是由于矛盾运动造成的,矛盾是指事物自身所包含的既相互排斥又相互依存,既对立又统一的关系 .马克思主义认为任何事物都是作为矛盾统一体而存在的,矛盾是事物发展的源泉和动力.

解题思路：根据氧气的用途可知，氧气可供给呼吸或支持燃烧；氧气也会使铁生锈等．

氧气可供给呼吸或支持燃烧；氧气也会使铁生锈、食物腐烂等．
故答案为：供给呼吸或支持燃烧；使铁生锈、食物腐烂．

点评：
本题考点： 氧气的用途．

考点点评： 本题难度不大，属于开放性试题，掌握常见化学物质的性质与用途是正确解答本题的关键．

我们生长在这个地球上,每一天都离不开太阳,假如有一天太阳请了假,不出来了人类将回无法想象.
如果世界没有了太阳,世界将会一片漆黑,那时多么可怕呀,如果没有了太阳,我们黑白不清,分不清白天晚上.
如果没有了太阳,我们怎样生活,春天,万物不能生长,我们吃不到新鲜蔬菜,吃不到香甜的水果,喝不到新鲜的牛奶,农民伯伯种不了庄稼,我们人类饱受饥饿,可怕的无法想象.
如果没有了太阳,无法去绿树底下乘凉,看步到漫山遍野的野花,小草还有绿油油的庄稼,大地将看不到一片绿色.
如果没有了太阳,洗的衣服,不能晒干,穿不到暖和的衣服,大人小孩,无法去晒太阳,年轻人无法上班,我们不能按时走进学校,走进课堂,无法上课.
人类真是一天也离不开太阳,太阳给了我们温暖,给了我们生命,给了大自然一切.
假如没了太阳,一切都无法想象.
我们生长在这个地球上,每一天都离不开太阳,假如有一天太阳请了假,不出来了人类将回无法想象.
如果世界没有了太阳,世界将会一片漆黑,那时多么可怕呀,如果没有了太阳,我们黑白不清,分不清白天晚上.
如果没有了太阳,我们怎样生活,春天,万物不能生长,我们吃不到新鲜蔬菜,吃不到香甜的水果,喝不到新鲜的牛奶,农民伯伯种不了庄稼,我们人类饱受饥饿,可怕的无法想象.
如果没有了太阳,无法去绿树底下乘凉,看步到漫山遍野的野花,小草还有绿油油的庄稼,大地将看不到一片绿色.
如果没有了太阳,洗的衣服,不能晒干,穿不到暖和的衣服,大人小孩,无法去晒太阳,年轻人无法上班,我们不能按时走进学校,走进课堂,无法上课.
人类真是一天也离不开太阳,太阳给了我们温暖,给了我们生命,给了大自然一切.
假如没了太阳,一切都无法想象.

福兮祸之所依,祸兮福之所伏.
塞翁失马,焉知非福.
欲思其利,必虑其害,欲思其成,必虑其败.
否极泰来
物极必反
乐极生悲

每一个事物都会有不同的作用以及影响,我国古代思想家--老子的道德经中曾提到过.当然,到理是人经过不断探索得出的,在未来,可能会有无数个面.

有害的一面：灰尘常常携带致病菌,人体吸入大量灰尘后,可能出现呼吸道不适.
有利的一面：云的形成既需要上升的水汽,又需要灰尘,有了灰尘,水汽才能凝聚成小水滴,最终变成雨.

三人行,必有我师焉,择其善者而从之,其不善者而改之

根据马哲原理,任何东西都有两面性

例：CO  有益方面：炼钢或作燃料    有害方面：有毒，污染空气（合理即可）   

 

Everything has two sides and also comes with both pros and cons.

所有的事物都有两面,有好的一面也有坏的一面,是指一个人或一个事物同时存在的两种互相矛盾的性质或倾向.两面性问题就是说一个问题所具有的双重含义.
希望帮到你,望采纳,满意请点击：采纳

塑料是自然界不存在,人工合成的.既满足了生活需要,又造成了白色污染.

对的,一面是它的优越性,另一面是它的缺点,所以,看待事物要从多方面去思考,会有意想不到的结果.

Every coin has two sides

fpifhoiweghnSKDlwerfhlorhsurheho;rseklrnawoiehrRHOI;WEHRSODJKFEHO;IhejWOERWOERUSL;DJKFIESDPUFIES'FUJSDKLFJDS,MNJSDFOIDFE'O;WWOWPERIODSPOFIEPOWIR'PERIOWPRIWOPRPEIOWRP

吾,一凡人尔.徒可称者,肤白也.吾自认豁达跳脱,毫无城府.贵友情,乐与优游,故待友如火,而对不识人,则如冰雪. 舍友尝以短信询话费,久未得复.吾戏曰：汝人品不佳所致也.然系硬伤,无可救也.彼大受激,饱吾以老拳.然吾大笑不止.又,近临期末之考,人皆曰,当复习矣.吾独云：且待吾预习.如此趣事,不一而足. 今大二将终,宜努力矣.（怎么大二就要毕业?）毕业在即,当珍惜目前,活于当下也.

气候对人类具有两面性,既可以造福于人类,也可以将人类置于死地.请根据自己（1）造福于人类的例子：亚热带气候雨热同期,适合种植水稻（2）给人类带来

水能载舟亦能覆舟,火能取暖亦能成灾.

The report says lack of water in the future may result in several problems.It may increase health problems.Lack of water often means drinking waters not safe.Mr.Engelman says there are problems all over the world because of diseases,such as cholera,which are carried in water.Lack of water may also result in more international conflict.Countries may have to compete for water in the future.Some countries now get sixty percent of their fresh water from other countries.This is true of Egypt,the Netherlands,Cambodia,Syria,Sudan,and Iraq.And the report says lack of water would affect the ability of developing to improve their economies.This is because new industries often need a large amount of water when they are beginning.
Vincent van Gogh,for whom color was the chief symbol of expression,was born in Groot-Zundest,Holland.The son of a pastor,brought up in a religious and cultured atmosphere,Vincent was highly emotional and lacked self-confidence.Between 1860 and 1880,when he finally decided to become an artist,van Gogh had had two unsuitable and unhappy romances and had worked unsuccessfully as a clerk in a bookstore,an art salesman,and a preacher in the Borinage (a dreary mining district in Belgium),where he was dismissed for overzealousness.He remained in Belgium to study art,determined to give happiness by creating beauty.The works of his early Dutch period are somber-toned,sharply lit,genre paintings of which the most famous is "The Potato Eaters" (1885).In that year van Gogh went to Antwerp where he discovered the works of Rubens and purchased many Japanese prints.
In 1886 he went to Paris to join his brother Théo,the manager of Goupil's gallery.In Paris,van Gogh studied with Cormon,inevitably met Pissarro,Monet,and Gauguin,and began to lighten his very dark palette and to paint in the short brushstrokes of the Impressionists.His nervous temperament made him a difficult companion and night-long discussions combined with painting all day undermined his health.He decided to go south to Arles where he hoped his friends would join him and help found a school of art.Gauguin did join him but with disastrous results.In a fit of epilepsy,van Gogh pursued his friend with an open razor,was stopped by Gauguin,but ended up cutting his own ear off.Van Gogh then began to alternate between fits of madness and lucidity and was sent to the asylum in Saint-Remy for treatment.
In May of 1890,he seemed much better and went to live in Auvers-sur-Oise under the watchful eye of Dr.Gachet.Two months later he was dead,having shot himself "for the good of all." During his brief career he had sold one painting.Van Gogh's finest works were produced in less than three years in a technique that grew more and more impassioned in brushstroke,in symbolic and intense color,in surface tension,and in the movement and vibration of form and line.Van Gogh's inimitable fusion of form and content is powerful; dramatic,lyrically rhythmic,imaginative,and emotional,for the artist was completely absorbed in the effort to explain either his struggle against madness or his comprehension of the spiritual essence of man an

习惯性思维的作怪,人们往往在左右两者之间选择.早上闹钟响起,有一声音说：“算了吧,继续睡觉吧!”另一声音立马反驳道：“起床,坚持就是胜利!”挣扎了一番,最终还是跑步的声音占主导……看到他人成功之时,便暗下决心,...

解题思路：摩擦力大小的影响因素：压力和接触面粗糙程度．压力一定时，接触面越粗糙，摩擦力越大；接触面粗糙程度一定时，压力越大，摩擦力越大．
（1）增大摩擦力的方法：增大压力，增大接触面的粗糙程度．
（2）减小摩擦力的方法：减小压力，减小接触面的粗糙程度，使接触面脱离，用滚动代替滑动．

A、给笨重的旅行箱装上轮子，用滚动代替滑动；
B、用力捏闸，是在接触面的粗糙程度一定时，增大压力来增大摩擦力；
C、气垫船利用气体将船和水分离，是使接触面脱离，减小摩擦；
D、螺丝刀柄上凹凸不平的花纹，在压力一定时，增大接触面的粗糙程度来增大摩擦力；
E、经常给自行车轴加润滑剂，是使接触面脱离，减小摩擦．
可见，使接触面彼此分离而减小摩擦的是CE，属于增大压力增大摩擦的是B．
故答案为：CE；D．

点评：
本题考点： 增大或减小摩擦的方法．

考点点评： 知道摩擦力大小的影响因素、增大和减小摩擦力的方法，能用摩擦力的知识解释生活中的问题．

对的,一面是它的优越性,另一面是它的缺点,所以,看待事物要从多方面去思考,会有意想不到的结果.

因为一个规律只能包含事物的一个面.比如吸烟容易得肺癌,有害健康是一个规律；吸烟可以缓解压力,有利健康是一个规律.规律之所以成为规律,是人定义的结果,人从语义上就把它定死了,所只能是一面.

带着细菌和病毒 带来雨露

事情总是会存在两面性,所以结果也会有好有坏,当然成功给我们带来更好的工作经验,也带来更多的喜悦,当然失败也是在所难免的,人总是不能那么的一帆风顺,失败虽然是惨痛的,但也会产生更多的经验,一个失败者总结的四点外贸经验教训,告诉我们失败并不可怕,可怕的是我们没有一颗勇敢面对失败的心态!从失败中总结的经验教训更能让人铭记在心!

解题思路：（1）根据炼铁的原理及高炉气中含有一氧化碳分析回答；
（2）根据铁生锈的条件分析防锈的措施，根据生铁和钢的成分分析性能不同的原因．

（1）高炉炼铁中CO还原氧化铁的化学反应方程式是：Fe₂O₃+3CO

高温
.
2Fe+3CO₂；煤气中毒是因为CO与血液中血红蛋白结合，从而使人体缺氧而造成“煤气中毒”．由于高炉废气中含有一氧化碳，所以，高炉气不能直接排入空气．
（2）钢铁制品与氧气、水接触易生锈，我们可以采取的防锈措施是刷漆；生铁是含碳量为2%～4.3%的铁合金，而钢则是含碳量为0.03%～2%的铁合金．所以，钢和生铁都是铁与碳元素形成的合金，由于该元素含量的不同，使得钢和生铁的坚韧性有较大差异．
故答为：（1）Fe₂O₃+3CO

高温
.
2Fe+3CO₂、血红蛋白、不能；（2）刷漆等；碳．

点评：
本题考点： 一氧化碳的化学性质；一氧化碳的毒性；生铁和钢；金属锈蚀的条件及其防护．

考点点评： 本题难度不大，掌握工业上炼铁的反应原理、一氧化碳的毒性、铁锈蚀的条件、生铁和钢的区别等是正确解答本题的关键

一是多观察多实验多思考
二是运用科学知识和方法

要看你怎么写了

Generally speaking,Penicillin has saved many people.However,drug has its side-effect,it would cause some people dead.
As it says every coin has two sides.

事实上,人类的科学技术发现都有两面性.我们如能正确利用科技创造,就会造福于人类；我们如果不能正确利用科技发现,就有可能祸害人类自己.
社会发展的历史表明,人类每一次对自然取得的巨大胜利,都会不可避免地带来自然界对我们的报复.我们研究自然,目的应当是为了遵循自然法则,而不是相反.当然,为了改善人类的生存条件,改造自然也是必要的.但改造自然应当有个度,而且改造本身也应当遵循自然法则.
所以,任何一项科学技术的发明,它在给我们带来福利的同时,都蕴含着某种对人类构成巨大安全隐患的威胁.科学发展的责任,不仅在于推动技术的进步,同时也在于限制这种技术的负面作用,防止这种技术被不恰当地使用,从而可能对人类产生危害.

民族资产阶级具有革命性 但同时具有软弱性与妥协性
因为民族资产阶级自身发展受到压迫和帝国主义的阻挠 会奋起反抗,因而具有革命性
但是自身力量弱小 无法与帝国主义相抗衡,不得不依附于帝国主义而生存

既能育人,也能灭人；既能温婉可人,也能波涛汹涌；既能载人载物,也能破釜沉舟.

这些都是我写作的时候常用的．觉得不饶口也好记．
every coin has its two sides.
everything has its pros and cons.(这句比较口语一点)
...is a two-edged sword.
...是把双刃剑．
No garden without its weeds.
没有无杂草的花园（有利有弊）
everything has double folds.
every medal has its reverse.
补充问题的回答:
推荐用这句:
It is essential to examine every angle in order to fully understand the nature of a perplexing problem.
为了全面了解一个复杂问题的本质,很有必要从各个方面对事件进行调查．

1.The thing is all both sides,at we happy usage of it of time have to notice its not good one side.
2.See from another angle,more and more people pay attention to this topic,discussing this topic,is explaining a society Be progressing.We has reason to believe our future would be more fine.