以二手烟的危害写一篇英语作文,词数120左右.

Hello, everybody!
I
am the chairman of the students' union. Now I want to say something about an exchange
meeting of our used things which is to be hold from 3:00 pm to 6:00 pm on this Saturday.It’s
address lies beside the centre road of our school.We hope this meeting can make
good use of our life goods and our classmates will learn to save.Things being
able to be exchange include washbowl(脸盆),broom(扫把),lamp(台灯), refrigerator(冰箱)and all kinds of our life public daily use.Welcome!

Students' Union

B

精选高中英语作文：二手商品之我见
In recent years,second-hand transactions have become quite common.Nowadays there are more and more secondhand goods in the market,such as secondhand books,furniture,appliances,cars,and so on.Why do so many people like to buy secondhand goods?
近几年,二手交易已经变得很普遍.现在市场上有越来越多的二手商品,比如二手书,家具,电器,汽车等等.为什么这么多人喜欢买二手商品呢?
The following reasons can account for this phenomenon.Above all,secondhand goods are cheaper than new ones.This enables those people who have poor financial abilities to buy the things they want.Moreover,secondhand goods transactions make it possible for people to make good use of the goods which may be useless in their hands.Besides,Internet provides a more convenient and quicker transaction platform for secondhand goods.
以下原因可以解释这一现象.首先,二手商品比全新的便宜.这使那些经济实力较弱的人能够买他们想要的东西.其次,二手商品交易使人们能好好利用在他们手上没有用处的东西.此外,互联网给二手商品提供了一个更方便快捷的平台.
However,there are also some problems in secondhand goods transactions.For one thing,the quality of secondhand goods can not be promised and you can not enjoy the good after-sale service.For another,secondhand goods market lacks enough supervision and management,and there exist many dishonest business activities.In a word,I think secondhand goods transaction is a good trading way,but it needs further perfection of the rules.
但是,二手商品交易也存在一些问题.一方面,二手商品的质量不能够保证,你不可以享受良好的售后服务.另一方面,二手商品市场缺乏足够的监督和管理,存在很多不诚实的商业活动.总之,我认为二手商品交易是一种好的贸易方式,但是需要进一步完善规章制度.
精选高中英语作文是不是对同学们有所帮助呢?希望同学们的作文水平都能有更大的提高!

一般写字用的纸,不都是两边都可以写的么?所以就没必要说是二手纸了啊.你可以说 this kind of paper can be wrote on both sides.
如果是回收再利用的纸,用recycled paper就好了.

二手的两门衣柜、120元,书桌、90元、三门衣柜、150元,标准床1.5*1.8、150元,餐桌+6椅、小玻璃茶几 150元.

15751+4x=A（对称数）
A

Used

Used Vehicles Marketing Co.,Ltd.

Following the real-name system for mobile phones,network real-name system headlines,the real-name secondary trading in order to make the industry the focus of attention.Immediate effect,the sale of second-hand mobile phones in Beijing and second-hand computers to all the real-name system.Analysis of the industry,with secondary trading of the real-name system to completely block the fence channels,is conducive to the protection of residents and property safety.However,reporters found in the relevant market,"there are policies,the measures to counter the phenomenon of" widespread,the real-name system for promoting the prospects are still unpredictable.
Second-hand mobile phone trading remains chaotic
Second-hand mobile phone trading confusion,and was once regarded as one of the reasons for the proliferation of cell phones,the second-hand mobile phone real-name system for the implementation of transactions,the relevant departments Heihuo cut off sources of care and thought is evident.
Recently,the Public Security Bureau of Chaoyang District of law and order detachment and the Joint Business Council,common in Chaoyang District,second-hand phone market,scrap metal recycling market to establish law and order office,the hoisting of law and order management responsibilities licence,the holder of employment through training of employees,establish and improve the registration system.According to reports,288 Big World,and North Korea to Wantong Hezhong three second-hand phone market has become the first pilot,and set up a security office,equipped with security guards,installation of monitoring equipment and identity card for identification.
Although relevant departments have been expressly provided second-hand mobile phone trading the real-name system,but the Xizhimen in the mobile phone market,the reporters found that such transactions still very confusing.Gangchu Xizhimen subway,the reporter surrounded by a group of hawkers,was asked whether there was the old phone sold.When a reporter said that second-hand mobile phone trading is now not bring ID card,one of the hawkers and even told reporters that such provisions can not afford any effect on them,regardless of the seller's phone is stolen or seized,as they like or do not Error,the seller never have to worry about.In the vicinity of a second-hand mobile phones underground supermarket,in order to make a sale as soon as possible,who runs an even said that the goods are on hand quickly,otherwise a period of time the real-name system on the Buhao Ban.
Industry experts believe that encourage large-scale mobile phone stores,and other informal channels of intervention,through brand management safeguard the interests of consumers and regulate second-hand phone market is an effective way,in the complex telecommunications become the first batch of test the waters of second-hand mobile phone business of large stores."Although the company used basic phone business has stopped,but we have been dealing in the real-name system." Operation and management of complex telecommunications Chen Hongyu,general manager,told reporters that there are only stores in the Chongwen District in this part of the business,users buy-in The company is the second-hand mobile phone supply,but sales of these phones have a certain pressure.According to reports,many traders recovery in the price higher than that of rehabilitation,which allows users tend to sell the old mobile phone vendors.But after the renovation,traders will no longer expensive phones sold to consumers,which made a huge difference.
Market place is still huge loopholes
Not only that,the second-hand computers and cell phones used as also the real-name system.Buyers and sellers are required to provide identity cards to check authenticity of transactions registered after the record.Once the police found the unidentified source for handling stolen goods suspected of goods,the owner will Beixing Ju.
Zhongguancun in a second-hand computer market to about 56 counters of second-hand laptop and found the boss to answer almost all the same,the sale of second-hand laptop does not require verification measures,the boss will not take the initiative to require the production of identity cards or invoices,purchase of consumer notebook distribution Nor to provide any proof of Lailu,final sales only after the dealer to provide a receipt,in addition to any other sales of the certificate.
Electronic City in Silicon Valley a monopoly of a certain computer sales staff told reporters that second-hand goods sources are complex,from individuals or companies out from the regular goods,lawless elements have to fence the goods,and the South from the foreign garbage products.These are the secondary market,the "mainstream products." In Zhongguancun,the secondary listing of more of the retail and wholesale,more second-hand products through the Zhongguancun flows north and northeast China and other regions,such goods involved in the monitoring of different geographical industrial,commercial,public security law enforcement cooperation ,In practice it is not easy.
Insiders said that although the surface,second-hand goods transactions real-name system seems to be flawless,flawless,this is not the case.Second-hand computer transactions real-name system still has many loopholes,because second-hand goods transactions real-name system only in the secondary commodities trading market,in private transactions of second-hand goods in this second-hand computers are not the real-name system of trading limits.
As such,second-hand computer transactions real-name system and the implementation of the significance of this » Because the public security departments can not restrict users of second-hand goods transactions must be conducted in the trading market,which for criminals to avoid second-hand goods transactions real-name system provides a best chance,it has also become second-hand commodities trading one of the largest real-name system of loopholes.
With the growing popularity of the Internet,online sales have become second-hand goods transactions in emerging channels,its sales even more than the Zhongguancun entities counters,how the secondary trading network for effective supervision,the relevant departments need to be resolved is the main problem.It is learnt that there is no trading network for the specific measures,we understand that the Beijing police supervisor network technology sector,will develop network transactions regulatory measures.
Internet trading of uncertainty,no doubt second-hand commodities trading network for the added difficulty of monitoring.A long engaged in online trading of staff,told reporters,although that has been trading second-hand information on the real-name system,but is still not received any regulatory notice.
According to reports,the purchase of its second-hand goods are mainly university students,in a good price and agreed on modalities and locations to be able to conduct transactions,thanks to the peer-to-peer is the way,he rarely transactions to verify the identity of the other side.When asked about the real-name system for secondary trading prospects,he said that the implementation of the system can indeed reduce transaction risk,but the specific implementation down too much difficulty.
Analysts point out that,in order to avoid second-hand goods transactions bound by the real-name system,businesses will certainly try to avoid second-hand goods transactions bound by the real-name system.At present,some people have started to second-hand goods transactions by publicly traded into private transactions,or transactions from the reality of second-hand goods market transactions into network transactions,such a secondary trading to the real-name system is still a display.
Link
Secondary trading of the real-name system requirements
The seller asked to bring along their trading goods,identity cards,a first inspection of the Office of law and order and genuine and fake ID card name,identity card,leaving stall the record,the exchange for a national "registered logo"; paste the logo,the goods are eligible to enter the transaction Distribution channels.The buyer took away goods,will also need to name,identity card number,etc.and who runs the newspaper,which the police to control the logistics transactions.

AVID bb7,机械碟刹之王

二手烟,也称为环境烟草烟（ETS）,既包括吸烟者吐出的主流烟雾,也包括从纸烟、雪茄或烟斗中直接冒出的侧流烟,也就是指吸烟的人所呼出的气体和香烟本身燃烧时的烟雾的俗称.二手烟中包括40多种致癌物质.

史记》的史料十分丰富,其来源综合起来可以分为四个方面：
第一个来源是书籍.凡汉代以前古书,司马迁无所不采.经书、国语、国策、楚汉春秋、诸子、骚赋等都是他写史的重要材料来源.他在《史记》的许多篇章里都作了明确的说明.如《三代世表》中说“余读《谍记》,黄帝以来皆有年数……于是以《五帝系谍》、《尚书》集世纪黄帝以来讫共和为世表”；《六国年表》中说“太史公读《秦记》至犬戎败幽王”；《管晏列传》中说“吾读管氏《牧民》、《山高》、《乘马》、《轻重》、《九府》及《晏子春秋》”；《司马穰苴列传》中说“余读《司马兵法》,闳廓深远,虽三代征伐,未能竟其义”；《十二诸侯年表》中说“太史公读《春秋历谱谍》至周厉王”；《五帝本纪》中说“予观《春秋》、《国语》”；《屈原贾生列传》中说“余读《离骚》、《天问》、《招魂》、《哀郢》”等等.这些都表明司马迁是广泛搜集并充分利用了当时所能得到的书籍资料来从事著述的.
第二个来源是档案.司马氏世为史官,司马谈曾任太史公,后来司马迁又继任此职,因此,汉初档案如诏令、记功册等都能见到,并且用作写史的资料.这一点,也可以在《史记》中得到证明.如《惠景间侯者年表》中说“太史公读列封至便侯”；《高祖功臣侯者年表》中说“余读高祖侯功臣,察其首封,所以失之者”；《儒林列传》中说“余读功令,至于广厉学官之路”等等都是.
第三个来源是见闻.秦汉史事,对于司马迁来说是近现代史.当时记载有缺,因此多赖见闻.如《项羽本纪》赞中说“吾闻之周生曰,‘舜目盖重瞳子’,又闻项羽亦重瞳子”；《赵世家》赞中说“吾闻冯王孙曰：‘赵王迁,其母倡也……’”；《刺客列传》赞中说“公孙季功,董生与夏无且游,具知其事,为余道之如是”；《卫将军骠骑列传》中说“苏建语余曰‘……其为将如此’”；《太史公自序》中说“余闻董生曰；‘周道衰废,孔子为鲁司寇……’”.这是得于所闻的.《李将军列传》中说“吾睹李将军悛悛如鄙人,口不能道辞”；《游侠列传》中说“吾视郭解,状貌不及中人,言语不足采者”.这是得于所见的.《张释之冯唐列传》中说唐子冯遂,“字王孙,亦奇士,与余善”；《郦生陆贾列传》中说“平原君子,与余善,是以得具论之”；《田叔列传》中说田叔的少子“仁与余善,余故并论之”.这是得于交游的.这些从见闻和交游中得来的材料,不仅增加了史料来源,而且增强了《史记》内容的真实性.
第四个来源是游历.司马迁为了著《史记》,曾经登涉名山大川,访求史迹.如《五帝本纪》中说“余尝西至崆峒,北至涿鹿,东渐于海,南浮江淮”；《河渠书》中说“余登庐山”；《魏公子列传》中说“吾过大梁之墟”；《屈原贾生列传》中说“余……适长沙”；《龟策列传》中说“余至江南”；《淮阴侯列传》中说“吾如淮阴”；《伯夷列传》中说“余登箕山”；《蒙恬列传》中说“吾适北边,……观蒙恬所为秦筑长城”等等.这些反映了他足迹所至几乎遍及全国,也说明了他周游各地与写作《史记》的密切关系.
《史记》的史料来源很丰富,然而就各个历史时期来说,史料的多少又很不平均.春秋以前间有缺略；春秋战国至秦比较详细；汉建立后一百年左右的历史,则详尽记载,篇幅最多.也就是说,时代越近材料越多.对于上古史事,司马迁当时已有文献不足之叹.刘知几在《史通·叙事》篇中称：“观子长之叙事也,自周已往,言所不该,其文阔略,无复体统；自秦汉已下,条贯有伦,则焕炳可观,有足称者.”这个评论是对的,但这种情况的产生,是因为司马迁据以写史的材料前少后多所致,我们自然不能苛求于他.

14分=2/7小时=4/14小时
由于 4/15甲速
手机提问的朋友在客户端右上角评价点【满意】即可.

哈苏XPAN相机和添加镜头
这就是传说中哈苏Xpan 35毫米全景相机,可惜不再进展,但仍处于巨大需求之间的摄影记者无处不在.
我已经拥有这台相机的新问题.
这是Mk1模式,而不是后来Mk2 ,并配备添加镜头-标准X pan试剂盒
镜头是美妙状态,污点,无任何内部灰尘.有一种轻微的擦伤上方的摄像头（见照片） .
光,这些镜头是最好的我见过的相机,可拍摄35毫米胶片.
照片质量是惊人的.
它配备了镜头盖,镜头阴影,扣押的精神层面,指导手册,电影贴纸及原盒.
电子接触史柜台350个摄像头的接触表明新.
我买相机前我第一次数码相机,并连同Photomerge设施的软件意味着,我只提出一个或两个辊通过相机开关之前, 100 ％的数字.
哈苏XPAN添加F4类镜头
在极其紧凑的设计和高图像质量的哈苏45分之4毫米使它成为完美的标准镜头的哈苏XPan相机.
当用于全景图像的镜头有一个真正的广角横向覆盖71 ° .

Hello, everybody!
I
am the chairman of the students' union. Now I want to say something about an exchange
meeting of our used things which is to be hold from 3:00 pm to 6:00 pm on this Saturday.It’s
address lies beside the centre road of our school.We hope this meeting can make
good use of our life goods and our classmates will learn to save.Things being
able to be exchange include washbowl(脸盆),broom(扫把),lamp(台灯), refrigerator(冰箱)and all kinds of our life public daily use.Welcome!

Students' Union
求采纳为满意回答.

1 This book is a friend to accompany me in the second-hand bookstores to buy books found by chance (accident)
2 excessive doting on their children grow up without the benefits of (good)
3 They think that as long as演主角will certainly appear,as expected,he really had (as)
4 talk to me End the pain.He left,was very easy (with)
5 have found this error,I immediately returned to the supermarket,you want more money will be returned to her (discover)
6 because they are poor,he can not afford to pay rent (be)

我们的团队要承担课题的研究技能.我们知道如何使用的主要数据和次要数据研究2013图像在consumers'heart飘柔洗发水.主要数据包括问卷调查.第二数据包括信息网络.

呵呵,一句话,假的.第一：100元,还是加上三脚架的,即使是二手的,也太便宜了点.说真的,这种价格只能买到口径（就是前面那块镜片的直径）在50mm以下的望远镜,而且一定还是杂牌的,质量绝对不行第二：他说白天看不见,晚上...

My first time to ride a bike
Today I can ride a bike very well. But three years ago, it was too hard for me to ride a bike. Now I still remember my first time to ride a bike.
I often fell off ...

这是松下的电饭煲.上面的文字是阿拉伯文,估计是往阿拉伯国家出口的.具体意思不明白.不好意思.

Brewery equipment,liquor storage containers,canned equipment,liquor packaging equipment,machinery and equipment used in the processing and marketing.

Second hand smokers are non smokers who inhaled smoke from smokers around them.

second-hand commodities trading system

《史记》的史料十分丰富,其来源综合起来可以分为四个方面：
第一个来源是书籍.凡汉代以前古书,司马迁无所不采.经书、国语、国策、楚汉春秋、诸子、骚赋等都是他写史的重要材料来源.他在《史记》的许多篇章里都作了明确的说明.如《三代世表》中说“余读《谍记》,黄帝以来皆有年数……于是以《五帝系谍》、《尚书》集世纪黄帝以来讫共和为世表”；《六国年表》中说“太史公读《秦记》至犬戎败幽王”；《管晏列传》中说“吾读管氏《牧民》、《山高》、《乘马》、《轻重》、《九府》及《晏子春秋》”；《司马穰苴列传》中说“余读《司马兵法》,闳廓深远,虽三代征伐,未能竟其义”；《十二诸侯年表》中说“太史公读《春秋历谱谍》至周厉王”；《五帝本纪》中说“予观《春秋》、《国语》”；《屈原贾生列传》中说“余读《离骚》、《天问》、《招魂》、《哀郢》”等等.这些都表明司马迁是广泛搜集并充分利用了当时所能得到的书籍资料来从事著述的.
第二个来源是档案.司马氏世为史官,司马谈曾任太史公,后来司马迁又继任此职,因此,汉初档案如诏令、记功册等都能见到,并且用作写史的资料.这一点,也可以在《史记》中得到证明.如《惠景间侯者年表》中说“太史公读列封至便侯”；《高祖功臣侯者年表》中说“余读高祖侯功臣,察其首封,所以失之者”；《儒林列传》中说“余读功令,至于广厉学官之路”等等都是.
第三个来源是见闻.秦汉史事,对于司马迁来说是近现代史.当时记载有缺,因此多赖见闻.如《项羽本纪》赞中说“吾闻之周生曰,‘舜目盖重瞳子’,又闻项羽亦重瞳子”；《赵世家》赞中说“吾闻冯王孙曰：‘赵王迁,其母倡也……’”；《刺客列传》赞中说“公孙季功,董生与夏无且游,具知其事,为余道之如是”；《卫将军骠骑列传》中说“苏建语余曰‘……其为将如此’”；《太史公自序》中说“余闻董生曰；‘周道衰废,孔子为鲁司寇……’”.这是得于所闻的.《李将军列传》中说“吾睹李将军悛悛如鄙人,口不能道辞”；《游侠列传》中说“吾视郭解,状貌不及中人,言语不足采者”.这是得于所见的.《张释之冯唐列传》中说唐子冯遂,“字王孙,亦奇士,与余善”；《郦生陆贾列传》中说“平原君子,与余善,是以得具论之”；《田叔列传》中说田叔的少子“仁与余善,余故并论之”.这是得于交游的.这些从见闻和交游中得来的材料,不仅增加了史料来源,而且增强了《史记》内容的真实性.
第四个来源是游历.司马迁为了著《史记》,曾经登涉名山大川,访求史迹.如《五帝本纪》中说“余尝西至崆峒,北至涿鹿,东渐于海,南浮江淮”；《河渠书》中说“余登庐山”；《魏公子列传》中说“吾过大梁之墟”；《屈原贾生列传》中说“余……适长沙”；《龟策列传》中说“余至江南”；《淮阴侯列传》中说“吾如淮阴”；《伯夷列传》中说“余登箕山”；《蒙恬列传》中说“吾适北边,……观蒙恬所为秦筑长城”等等.这些反映了他足迹所至几乎遍及全国,也说明了他周游各地与写作《史记》的密切关系.
《史记》的史料来源很丰富,然而就各个历史时期来说,史料的多少又很不平均.春秋以前间有缺略；春秋战国至秦比较详细；汉建立后一百年左右的历史,则详尽记载,篇幅最多.也就是说,时代越近材料越多.对于上古史事,司马迁当时已有文献不足之叹.刘知几在《史通·叙事》篇中称：“观子长之叙事也,自周已往,言所不该,其文阔略,无复体统；自秦汉已下,条贯有伦,则焕炳可观,有足称者.

我记得这个咖啡机当初买来就是二手的,有修过一次,具体情况Brent和Kong会比较清楚.
今天我有询问咖啡店的老板,他告诉我这台咖啡机最重要的一个烧水的部件坏了.
咖啡店老板表示修需要很长的时间与金钱,所以他没有修并且归还给我们了,

As I remember,this coffee maker was bought as a second-hand product,and I had it repaired once later,Brent and Kong know the situation in detail.I've confirmed with
the keeper of the coffee shop today,and he told me one of the key parts for water boiling was out of function now,and considering a long time and plenty of money to fix it,he's not willing to do it and gave it back to us again.

可以过滤大部分,所以火灾有浓烟时要湿湿的布条或毛巾盖住鼻子逃生,不然会被熏死,
但你呼吸就受到限制,很困难,你洗脸时用过热毛巾护鼻子吗?就是那感觉

你两次一共花了70+80=150元
一共得了50元
也就是支出了100元得到了一支80元得笔
多花了20元
这种题目不要自己绕自己

这些没有调查啊.下面参考一下 二手烟也称为环境烟草烟（ETS）,既包括吸烟者吐出的主流烟雾,也包括从纸烟、雪茄或烟斗中直接冒出的侧流烟.二手烟中包含4000多种物质,其中包括40多种与癌症有关的有毒物质.在二手烟中,许多化合物在侧流烟中的释放率往往高于主流烟.如被其他非吸烟人士吸进体内,亦可能和氡气的衰变产物混合一起,对人体健康造成更大的伤害.

UVW应该是变频器输出的三相电源.S是停止,T是启动.W是变频调速.个人看法.因为不知道你是什么电器.

这些没有调查啊.下面参考一下 二手烟也称为环境烟草烟（ETS）,既包括吸烟者吐出的主流烟雾,也包括从纸烟、雪茄或烟斗中直接冒出的侧流烟.二手烟中包含4000多种物质,其中包括40多种与癌症有关的有毒物质.在二手烟中,...

如果问世界上最伟大的爱是什么?那莫过于纯洁的母爱!对此,我国著名女作家冰心也唱出了对慈母的爱的赞歌——《繁星·春水》.
记得在冰心写的《繁星·春水》中曾经有这样的一首小诗：
母亲呵!
天上的风雨来了,
鸟儿躲到他的巢里；
心中的风雨来了,
我只能躲到你的怀里.
虽然这小诗只有三十来个字,但却深深地体会出母爱是多么的博大无边!不是吗?当我们烦恼、痛苦、伤心、悲哀的时候,除了能投入妈妈的怀抱中哭,我们还能做什么呢?
妈妈把我们带到这个美好的世界来,让我们去享受别人的爱护；妈妈是我们的第一位老师,辛苦地把我们抚养成人；妈妈是我们的精神支柱,总是支持着我们,鼓励着我们,当我们摔倒了流血,最痛的不是我们,是妈妈的心；当我们不听话,妈妈动手打我们,最痛的同样是妈妈,正所谓“打在儿身痛在娘心”.可是,当妈妈帮我们补衣服刺到手指,妈妈仍然会觉得开心,因为如果她的痛能够换来我们的快乐,就算是痛不欲生,对于妈妈来说也是值得的.这使我想起一首诗：
慈母手中线,游子身上衣.
临行密密缝,意恐迟迟归.
谁言寸草心,报得三春晖.——《游子吟》
妈妈对我们所付出的实在太多了,而这是我们做子女的一生也没办法报答的.
“可怜天下父母心”,妈妈真的真的是世界上最最最最伟大的人,而这怎么可以用三言两语表达出来呢?在这个地球里,每个人只有一个亲妈妈,我们必须争取在有限的时间中为妈妈做自己力所能及的事情——在妈妈生日的时候送上最真挚的祝福,唱出《世上只有妈妈好》,就这么简单,妈妈也会觉的心满意足!

首先,文物,古迹,文人遗物这些实体类一般是作为第一手史料的即原始史料.原始史料可以被定义为是可考据的,不经主观臆断或添加删减所存在的能反映历史真实的材料.一般认为史记这类的文学性史学经注为二手史料,因为他们是带有作者的主观意见的,不能客观完整的反映历史真实.(特别是考试中一般把史官记载的作为二手史料)
口述流传的不是原始史料.
司马迁是史学家文学家.

We all inhale secondhand smoke
Smoking can reduce the life

二手,转手,回收,陈旧,残破,肮脏,

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零点六乘25分之十八加60%乘25分之九加五分之三乘25分之一
=0.6×（18/25+9/25+1/25）
=3/5×28/25
=84/125

你是新洲中学的么.今天月考历史考试有考到这个.
第一手资料就是原来的或该事件(或活动)的首次记录,是事件的实际目击者或参与者所经历的.
第二手资料是至少一次以上被援引的关于该事件的叙述.


英译本是第二手资料.

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解题思路：

物质是由分子组成的，一切物质的分子都在不停地做无规则运动，分子间存在着相互作用的引力和斥力。扩散现象说明了一切物质的分子都在不停地做无规则运动。由于一切分子都在不停地做无规则运动，所以公共场合吸烟的时候，烟气会扩散到空气中，被在场的其它人吸收，故造成他人吸二手烟是由于分子在不停地做无规则运动的缘故。故选C.

C

这是一个著名的谣言,因为我能获得的所有资料都表明,二手烟的危害并不亚于一手烟,这并不意味着二手烟危害更大.事实上您说的是对的,但照您说的这样的话,那种有人非常喜欢的避免二手烟危害的所谓替代措施“吸一手烟,以避免吸二手烟”就失去了理论基础.事实上吸一手烟不可避免的要吸入自己制造出来的二手烟.
当然如果只把在营业性场所吸烟的顾客和该场所不吸烟的工作人员相比,工作人员受到的二手烟的危害才可能更大,但这样的比较没有什么实际意义,因为不管是一手烟还是二手烟,或者三手烟,都没有安全暴露水平.
有关二手烟和一手烟危害比较的媒体报道转载如下,转自控烟之声：
二手烟“危害更大” 不如直接吸一手烟?
据说有国外研究证明：一个家庭内,丈夫吸烟,妻子不吸烟,妻子得肺癌的机会比丈夫还要高1-3倍.所以不抽烟者比抽烟者受害更甚——大家不如去抽烟.事实真的如此吗?
谣言：二手烟比一手烟危害更大.据说有国外研究证明：一个家庭内,丈夫吸烟,妻子不吸烟,妻子得肺癌的机会比丈夫还要高1-3倍.所以不抽烟者比抽烟者受害更甚——大家不如去抽烟.
真相：国际癌症研究署把香烟烟雾分为两种：“主流烟”与“支流烟”.主流烟指从香烟过滤嘴端吸出的烟雾,支流烟则是烟草闷烧产生的烟雾.产生支流烟的燃烧,温度比产生主流烟的低,因不完全燃烧产生的致癌物多环芳香烃所占比例确实较高.但这就表示支流烟对人体危害一定更大吗?目前,学界主要用动物模型研究烟雾的致癌作用.截至目前,有些研究者发现处在总颗粒物相同的前提下,支流烟中的小鼠健康指标受影响更大,也有研究者认为暴露在主流烟中的大鼠,肺癌发生率显著较高,但在兔子和狗身上的实验结果则差异不明显.简而言之,在“致癌”这个问题上,哪种烟效果更明显,目前尚无定论.不过,以上试验的前提是“同样的烟雾浓度”.现实生活中,支流烟浓度会随着距离拉开而下降.一般情况下,不吸烟者周围的烟雾浓度总会相对较低.此外,吸烟者会同时吸入主流烟和支流烟.而且社交习惯使吸烟者更容易聚集,导致他们吸入更多支流烟.就目前的人类流行病学研究数据来看,并没有足够数据显示“一个家庭内,丈夫吸烟,妻子不吸烟,妻子得肺癌的机会比丈夫还要高1-3倍”.
结论：谣言破除.没有证据认为不吸烟者比吸烟者健康受到更大威胁.
补充说明：根据世卫组织的数据,烟雾中含有超过4000种化学物质,其中至少含有250种已知的有害物质,69种已知的致癌物质.而美国疾控中心明确表示,二手烟可引起肺癌、哮喘、心脏病、呼吸道疾病以及婴儿猝死综合征等多种疾病.无论如何,吸烟对己对人健康都有严重威胁.从我开始,戒烟才是最好的选择.

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