简介：Pioneer说它已缩减了在St，Gabriel，LA处的氯碱产量以应对降低的需求。7月份产量比6月份降低了3100个电化学单元（ECU）——烧碱和氯气的综合单元。而6月份由于客户生产装置故障已降低了2100个ECU。St，Gabriel装置的产能为413，700个ECU／年。

简介：ProfessorXiaNai(1910-1985)wasaprominentChinesearchaeologistofsubstantialscholarlyachievement.HeisgenerallyregardedastheleaderofarchaeologicalmattersofthePeople'sRepublicofChina,andoneoftheimportantfoundersofmodernChinesearchaeology.Hisgreatacademicachievementsgavehimhighprestigeinacademiccirclesbothathomeandabroad.XiaNaiwasbornon7February1910,inWenzhou,Zhejianprovinceanddiedon19June1985inBeijing.InmodernChina,XiaNaiwasapioneer...

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简介：TheBeijingGenomicsInstitute(BGI)ofChineseAcademyofSciences(CAS)wasofficiallyfoundedinDecember2003.Itspredecessor,BeijingHuadaGenomicsResearchCenter,haspresentedsignificantcontributionstothedevelopmentoflifesciencesinChinabyitsexcellentscientificinnovationsandachievementsinthelastfiveyears.

简介：ThispaperfromtheunifiedvisualangleofphilosophyandeconomicshasobservedMarx'stheoryofecologicaleconomics,clarifiedthemisunderstandingonMarx'stheoryofnatureandecologicalenvironmentalthoughtathomeandabroadforalongtime,studiedsystematicallyanddeeplytheMarx'sthoughtthatnaturalandecologicalenvironmentisexternalconditionandinternalelementsofhumansocialeconomicgrowth,confirmedfirstlyMarxistheforerunnerwhoestablishedthetheoryofinternalcauseofnaturalecologicalenvironment.Itisoffar-reachingacademicandpracticalsignificance.

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简介：日本家用电子产品公司Pioneer已开发成功一种生物降解型DVD。据公司方面称，这种由谷物淀粉做成的DVD的成本比当前的聚碳酸酯DVD的成本要大幅下降。Pioneer公司预计在未来1～2年内将这种DVD投放市场，该公司已开发成功这种新型的厚度为1．2mm，直径为120mm的DvD碟片.

简介：ThefirsttimeIhavelearntthenameWuQingwasinahostshow,"Close-Up"onCCTV-4.SheisaprofessorofBeijingForeignStudiesUniver-sity,andmoreoversheisthedaughterofoneofChineseliterarygiants,Ms.BingXin.Iwasimmediatelyfascinatednot

简介：Nutrient-poor,sandysoilsformtheprevailingsubstrateatpost-miningsitesoftheLusatianregion(Brandenburg,Germany)andpresentachallengeforvegetationdevelopment.Westudiedtheorganicacidquantityandcompositionofthreecommonlyoccurringpioneerplantspecies,thelegumesLotuscorniculatusL.andTrifoliumarvenseL.andthegrassCalamagrostisepigeios(L.)Roth,todetermineifplantgrowthandexudationdifferedwith(non-sterilizedsoil)andwithout(sterilizedsoil)anindigenoussoilmicrobialcommunity.Weinvestigatedwhetherorganicacidswerefoundintherhizosphereandsurroundingsoilandwhetherthisinfluencednutrientmobilization.Thisstudyconsistsoflinkedfieldinvestigationsandagreenhouseexperiment.Plantsweregrowninthegreenhouseineithersterilizedornon-sterilizedsandysoilfromareclamationsiteintheLusatianmininglandscape(WelzowSu¨d,EastGermany).Aftersevenmonths,theplantbiomass,rootmorphology,organicacids,andwater-solublenutrientsandrootcolonizationwitharbuscularmycorrhizalfungi(AMF)anddarkseptateendophytes(DSE)wereanalyzed.RootsofallthreeplantsinthefieldandgreenhouseexperimentswerehighlycolonizedwithAMF.CalamagrostisepigeiosandT.arvensehadasignificantlyhighercolonizationfrequencywithDSEthanL.corniculatus.Thequantityandcompositionoforganicacidsstronglydifferedamongplantspecies,withthehighestnumberoforganicacidsfoundforL.corniculatusandlowestforC.epigeios.Thequantityoforganicacidswasgreatlyreducedinallplantsundersterilizedsoilconditions.However,thecompositionoforganicacidsandplantgrowthinsterilizedsoilwerereducedforbothlegumes,butnotforC.epigeios,whichhadahigherbiomassundersterilizedconditions.Changesinnutrientconcentrationsinthefieldrhizospheresoilrelativetothoseinthecontrolweremeasurableaftersevenmonths.Whilethespectrumoforganicacidsandthegrowthoflegumesseemedtobedependentonahighly

简介：摘要：“核心素养”这一概念首次在2014年3月教育部研制印发的《关于全面深化课程改革落实立德树人根本任务的意见》中被提出。2016年9月在《中国学生发展核心素养》中被正式公布。《普通高中英语课程标准（2017年版）》明确指出：“要倡导指向学科核心素养的英语学习活动观，设计有综合性、关联性和实践性特点的英语学习活动，是学生通过学习理解、应用实践、迁移创新等一系列融语言、文化、思维于一体的活动，获取、阐释和评判语篇意义，表达个人观点、意图和情感态度，分析中外文化异同，发展多元思维和批判性思维，提高英语学习能力和运用能力。”这标志着我国的教育从“素质教育”发展到了“核心素养教育”时代。作为普通高中英语教师要顺应时代发展潮流，除了传授英语基础知识，还要从“语言能力”、“思维品质”、“文化品格”、“学习能力”等四个维度去着手培养学生适应社会发展和终身发展的能力。