为你找到 1000 条关于 第5章题目2 的结果
下列支出最终不能形成费用的有()。
成本会计工作中分散在单位内部各部门和所属单位分别进行的工作方式是()
按照马克思的理论成本,产品成本是指产品价值中的()。
线性规划问题的数学模型包含哪些要素()
人与自然相处时应秉持的首要态度是()。
正确答案为A
Althoughmanyofusmayfeelair-conditionersbringrelieffromhot,humidorpollutedoutsideair,theyposemanypotentialhealthhazards.Muchresearchhaslookedathowthemovementofairinsideaclosedenvironment---suchasanofficebuilding---canspreaddiseaseorexposepeopleinthebuildingtoharmfulchemicals.OneofthemorewidelypublicizeddangersisthatofLegionnaire’sdisease,whichwasfirstrecognizedinthe1970s.Thiswasfoundtohaveaffectedpeopleinbuildingswithair-conditioningsystemsinwhichwarmairpumpedoutofthesystem’coolingtowerswassomehowsuckedbackintotheairintake(通风口),inmostcasesduetopoordesign.Thewarmair,filledwithbacteria,wascombinedwithcooled,conditionedairandwasthencirculatedaroundvariouspartsofthebuilding.Studiesshowedthatevenpeopleoutsidesuchbuildingswereatriskiftheywalkedpastairexhaustpipes.Largeair-conditioningsystemsaddwatertotheairtheycirculatebymeansofhumidifiers(湿度调节器).Inoldersystems,thewaterusedforthisprocessiskeptinspecialreservoirs,thebottomsofwhichprovidebreedinggroundsforbacteriawhichcanfindtheirwayintotheventilation(通风)system.Therisktohumanhealthfromthissituationhasbeenhighlightedbythefactthattheimmunesystems(免疫系统)ofapproximatelyhalfofworkersinair-conditionedofficebuildingshavedevelopedtheabilitytofightofftheorganismsfoundatthebottomofsystemreservoirs.Butchemicalscalled“biocides”areaddedtoreservoirstomakethemgerm-free,andtheyaredangerousintheirownrightinsufficientquantities,astheyoftencontaincompoundsstronglylinkedtocancers.Finally,itshouldbepointedoutthattheartificialclimaticenvironmentcreatedbyair-conditionerscanalsoaffectus.Inanaturalenvironment,whetherindoororoutdoor,therearesmallvariationsintemperatureandhumidity.Indeed,thehumanbodyhaslongbeenaccustomedtothesenormalchanges.Inanair-conditionedlivingorworkingenvironment,however,bodytemperaturesremainwellunder37℃,ournormaltemperature.Thisleadstoaweakenedimmunesystemandthusgreaterexposuretodiseasessuchascoldsandflu.Intheoldair-conditionedsystems,bacteriafirstdevelop______.
47.Howdomanyscientistsviewagingnow?A)Itmightbepreventedandtreated.B)Itcanbeasriskyasheartdisease.C)Itresultsfromavitamindeficiency.D)Itisanirreversiblebiologicalprocess.
主题的提炼方式
乔布斯说过手机的黄金比例是3.5英寸3:2的。
对于放大电路,所谓开环是指()。
未经请假离校或未按规定返校者,两周以上(含两周)者,按学校学生违纪处分规定或学籍管理的有关规定,予以()处理。
第一届奥林匹克赛会在雅典举行,后来规模逐渐扩大,成为显示民族精神的盛会。
下列各组词语中.书写规范的是()
单元格A1为数值1,在B1输入公式:=IF(A1>0,"Yes","No"),结果B1为()。
在“蚂蚁行为探究”这个项目中只运用了思维导图,没有运用到概念图。