Units（1～3）SB Ⅲ

知识与技能 1．重点词汇 across, afraid, already, although, attract, both, collect,copy, cross, describe, do well in, encourage, especially,event, fail, fit, harm, helpful, join, journey, mark, nearby,on, onto, pay (paid, paid), pity, possible, practice, pride,protect, proud, since, such, suppose, unless, waste, when-ever, wherever。     

Units (1～3) SB III

知识与技能1.重点词汇across,afraid,already,although,attract,both,collect,copy,cross,describe,dowellin,encourage,especially,event,fail,fit,harm,helpful,join,journey,mark,nearby,on,onto,pay(paid,paid),pity,possible,practice,pride,protect,proud,since,such,sup     

人教社新编高二《英语》下册同步辅导(Units13～15)

Unit13 The water planet一、单元学习要求1.掌握下列45个词语用法:cube,sailor,benefit,disadvantage,entertainm ent,property,range,hydrogen,atom,oxygen,solid,available,pure,gram,relation-ship,m ass,per,cubic,float,centigrade,absorb,stable,sensitive,bottom,nursery,m arine,m ariner,plankton,m akeup,m olecule,sub-stance,relatively,dissolve,organism,salinity,density,dense,volum e,capacity,release,turn...upside down,take aw ay(from),get started,m ake a note/notes of,rich and varied2.学习运用下列交际用语:…     

谈谈“动词+宾语+不定式”结构

“动词+宾语+不定式”是英语中一个十分有用的结构,不仅是考试中的重要考点,而且在口语中也用得非常广泛。可用于该结构的常用动词有advise,allow,ask,bear,beg,cause,colllnland,encourage,expect,forbid,force,get,hate,help,in-tend,invite,leave,like,mean,need,oblige,order,permit,persuade,prefer,request,remind,teach,tell,trouble,want,warn,wish等。如:     

诗苑漫步

The number songOne,two,how do you do?一,二,你好!Three,four,how do you do?三,四,你好!Five,six,what’s your name?五,六,你叫什么名字?Seven,eight,my name is Mary.七,八,我叫玛丽。Nine,ten,nice to meet you.九,十,很高兴见到你。One,two,three,me too.一,二,三,我也一样。Four,five,six,let’s make good friends.四,五,六,让我们交朋友吧。Seven,eight,nine,ten,OK!七,八,九,十,好!One,two,three,four,let’s go to school together.一,二,三,四,我们一起上学去吧。Five,six,seven,eight,don’t be late.五,六,七,八,不要…     

同步检测

Unit2~4词汇专项练习I.请你试着把下列单词整理一下,好吗?Tim,red,nine,table,seven,yellow,Sonia,pencil,bed,pen,Jane,K elsey,sister,father,David,dresser,green,book,m other,parent,blue,bookcase,Paul,black,brother,eraser,ruler,son,sofa,chair,cousin,white,Em m a,e     

编读交流

叶枫,项科,雷益明,刘涛,欧芳平,周霞,彭翔宇,黄胜,刘洋,黄稳,唐景德,丁星,吴铠,丁翠,邬丹,杨兵,文英,杨蒙,吴春丰,潘焕辉,伍娟,陈晋,周素玲,江才万,蒋莉,严涛,李东,肖美琴,邓浩,郭强,刘玉萍,黄海鹏,廖祥福,彭钦,肖明月,刘灿,黄健,欧兰桂,张迎春,常洁,周晓娟,欧阳宁萍,敖伟,蒋玲,熊建英,向如意,彭海,朱磊,周彪,张勋,向仁海,瞿繁,罗俊,魏鹏,肖英,张禹,朱时雨,卢求钧,杨群芳,张文灿,张亮平,余西京,金懋,谢冬燕,陈仕良,贺思嘉,韦冠宇,朱玉娇,谢巧君,李霆宇,谭晓宁,胡丹,王刚,黄健,李军霖,唐美玲,牛红凌,刘茂,余运瑾,邹思琪,杨芳园,田恬,肖启明,…     

英文书写ABC

同学们,你们想成为英文书法家吗?那么从一开始就要学写规范的英文字母,掌握基本的书写知识。看看以下有关英文书写的“八项注意”:1.英语共有26个字母,根据它们的读音,可分为三类:A a,Ee,Ii,O o,U u五个元音字母;Bb,Cc,D d,Ff,G g,H h,Jj,K k,Ll,M m,N n,Pp,Q q,R r,Ss,Tt,V v,W w,X x,Zz二十个辅音字母;Y y有时用作元音字母,有时用作辅音字母。2.字母要按一定的笔划顺序来写。书写时,小写字母中的f,i,j,t,x是两笔完成,其余的应一笔完成;大写字母中的C,G,J,L,O,S,V,W,Z是一笔完成,B,D,K,M,P,Q,R,T,U,X,Y要两笔完成,但A,…     

小学自然教学四字经

小学阶段 ,学习自然 ,科学启蒙 ,基础关键。提高认识 ,更新观念 ,同属主科 ,莫存偏见。课上课下 ,理论实践 ,课内课外 ,注重实验。吃透教材 ,认真钻研 ,精心准备 ,材料齐全。认真备课 ,巧设实验 ,课前预习 ,重要阶段。找准问题 ,抓住难点 ,自然课上 ,畅所欲言。激情引趣 ,制造悬念 ,自主学习 ,自己实验。自我探究 ,自找答案 ,小组讨论 ,各抒己见。适时点拨 ,抓住关键 ,广阔农村 ,丰富资料。综合利用 ,取之无限 ,动物植物 ,样样俱全。天文地理 ,人文景观 ,应有尽有 ,得天独厚。认识自然 ,学习自然 ,改造自然 ,利用自然。师生齐心 ,学好自然小…     

卫生部淘汰第三批中成药

卫生部发文通知,决定淘汰第三批105个中成药品种。下列品种应立即停止生产,并撤销其生产批准文号,已生产出厂的合格产品,于1995年年底前仍可销售和使用。 水泻散,补肺汤,风湿跌打止痛膏,红膏药,光和熊胆油,调元补肾丸,冠心宁片,婴儿散、镇惊散,小儿金片,肺灵丸,枸杞晶,四合素片,小儿止咳散,香连散,归芪丸,顺气丸、桔梗丸,桃儿七片,复方斑钠片,复方甘草丹参片,鼻炎宁糖浆,武威膏药,黄柏果片,健脾肥儿散,六味寒水石散,贝母止咳蜜浆,滋补片,止咳冲剂,汇雪,山楂糖浆,人参健脾膏,参桂鹿茸膏,复方胃痛片,首乌酒,炎症丸,驱风药水,消炎冲剂,小儿止咳冲剂,风湿骨痛糖浆,保健丸,小儿鸡肝散,肥儿冲剂,感冒灵胶囊,理气舒肝丸,复方鱼腥草素片,心可乐冲剂,首乌益寿晶,延龄冲剂,润     

羧甲基纤维素对抑制滑石浮选的作用机理

研究了硫化矿和滑石浮选分离过程中羧甲基纤维素钠(CMC)的抑制机理,结果表明,CMC吸附在硫化矿表面主要是通过其中的羟基和羧基与硫化矿表面作用,羟基可以在硫化矿表面形成氢键,羧基能够与硫化矿发生静电作用和化学作用.硫化矿吸附CMC后,其表面负电性增强,疏水性减弱,同时CMC也会影响硫化矿捕收剂在硫化矿表面的吸附.     

NO_x-空气催化氧化硫化氢制硫磺

利用NOx-空气氧化体系一步氧化硫化氢制硫磺。实验结果表明,在60℃下用NOx-空气催化氧化硫化氢30min后,采用气象色谱分析方法测定反应器里面残留气体中的硫化物含量,经分析计算得:此方法对硫的回收率可达99.28%。     

Effects of loading rate and hydraulic residence time on anoxic sulfide biooxidation

The optimal operation conditions in an anoxic sulfide oxidizing (ASO) bioreactor were investigated. The maximal removal rates for sulfide and nitrate were found to be 4.18 kg/(m3·d) and 1.73 kg/(m3·d), respectively. The volumetrical volumetric loading rates (LRs) observed through decreasing hydraulic retention time (HRT) at fixed substrate concentration are higher than those by increasing substrate concentration at fixed HRT. The sulfide oxidation in ASO reactor was partially producing both sulfate and sulfur; but the amount of sulfate produced was approximately one third that of sulfur. The process was able to tolerate high sulfide concentration, as the sulfide removal percentage always remained near 99% when influent concentration was up to 580 mg/L. It tolerated relatively lower nitrate concentration because the removal percentage dropped to 85% when influent con- centration was increased above 110 mg/L. The process can tolerate shorter HRT but careful operation is needed. Nitrate conversion was more sensitive to HRT than sulfide conversion since the process performance deteriorated abruptly when HRT was decreased from 3.12 h to 2.88 h. In order to avoid nitrite accumulation in the reactor, the influent sulfide and nitrate concentrations should be kept at 280 mg/L and 67.5 mg/L respectively. Present biotechnology is useful for removing sulfides from sewers and crude oil.     

洱海水硫化物及六价铬含量的检测分析

目的：了解洱海水硫化物及六价铬含量。方法：采集洱海20个点的水样对硫化物及六价铬的含量进行检测,分别采用亚甲蓝分光光度法,二苯碳酰二肼分光光度法进行测定。结果按照《地表水环境质量标准进行评价》。结果：硫化物、六价铬合格率为100%。结论：硫化物、六价铬均达到GB 3838-2002《地表水环境质量标准》的一类水质。     

Absorption of NO2 into Na2S solution in a stirred tank reactor

To understand the absorption mechanism of nitrogen dioxide into a sodium sulfide solution, a stirred tank reactor with a plane gas-liquid interface was used to measure the chemical absorption rate of diluted nitrogen dioxide into sodium sulfide solution. The absorption rates under various experimental conditions were measured and the effects of experimental conditions on nitrogen dioxide absorption rate were discussed. The results show that, in the range of this study, nitrogen dioxide absorption rate increases with increasing sodium sulfide concentration, nitrogen dioxide inlet concentration, and flue gas flow rate, but decreases with increasing reaction temperature and oxygen content in flue gas.     

铜锡组硫化物的颜色及其影响因素

本文讨论了以硫代乙酰胺（TAA）为沉淀剂，铜锡组硫化物的颜色与反应条件的关系；解释了铜锡组硫化物呈现中间颜色的原因；完善了使铜锡组离子沉淀完全的实验条件，为定性分析实验教学提供了科学的实验依据．     

硫化物标准溶液配制及其稳定性研究

本文采用去离子除氧水，由淀粉-醋酸锌-氯化钠-硫化钠等配制了硫化物标准溶液．实验结果表明，该法配制的硫化物标准溶液，室温下可稳定保存3个月，浓度基本不变，解决了硫化物标准溶液只能现配现标现用的稳定性问题．     

工业硫化钠提纯实验的改进

本文对一些化学实验教科书所载提纯工业硫化钠的实验方法进行了改进。本方法用水、工业酒精和丙酮替代95％的乙醇作溶剂提纯工业硫化钠。同时，还探讨了实验室提纯工业硫化钠的实验条件，如溶剂、溶剂的最佳配比、回流温度和回流时间，检测了提纯产品硫化钠的组成。     

气相色谱法测定污水中的硫醇混合物

探讨了污水中硫醇混合物(此实验测定的是正丁基硫醇和苯基硫醇)的测定方法和分析条件．污水中硫醇混合物采用硝酸银作沉淀荆使其生成硫醇银沉淀，通过衍生反应生成正丁基五氟苄基硫醚和苯基五氟苄基硫醚，再在一定色谱条件下，应用气相色谱分析仪可准确测定污水中痕量级的硫醇混合物．     

Absorption of NO2 into Na2S solution in a stirred tank reactor

To understand the absorption mechanism of nitrogen dioxide into a sodium sulfide solution, a stirred tank reactor with a plane gas-liquid interface was used to measure the chemical absorption rate of diluted nitrogen dioxide into sodium sulfide solution. The absorption rates under various experimental conditions were measured and the effects of experimental conditions on nitrogen dioxide absorption rate were discussed. The results show that, in the range of this study, nitrogen dioxide absorption rate increases with increasing sodium sulfide concentration, nitrogen dioxide inlet concentration, and flue gas flow rate, but decreases with increasing reaction temperature and oxygen content in flue gas.