下列关于E-R图的叙述中,哪些是正确的?
A、E-R图用于描述数据的逻辑模型BDE
暂无解析
什么色彩模式的图象转换为多通道模式时,建立的通道名称均为Alpha()
Inthepast,operationsweredifficult.Untilthemiddleoftheeighteenfifties,surgerywasverydangerous.Manypatientsdiedaftereventhesmallestoperations.Thiswasbecausebacteriaenteredthecutsinthepatientsbodied’andstartedinfection.Insomecountries,upto90percentofpatientsdiedfrominfectionafteroperations.In1865,however,JosephLister,aBritishsurgeon,foundananswertotheproblem.Heusedan“antisepticduring”andafteroperations.Thiskilledthedangerousbacteriaandmostofhispatientslived.Sincethen,surgeonshaveusedantisepticsinalloperations.SurgeryhasdevelopedinmanyimportantwayssincethedayofJosephLister.Today,whenpatientsgotohospitalforanoperation,theycanexpectthebesttreatment,incleanandhygienicconditions.
33.Operationsweredifficultanddangerousuntil_______.
A.1850
B.themiddleof1850
C.themiddleofthefiftiesoftheeighteenthcentury
D.themiddleofthefiftiesofthenineteenthcentury
34.Inthepassage,surgerymeans__________.
A.Theperformingofanoperation
B.cure
C.treatment
D.medicine
35.Inthepast,upto90percentofpatientsdiedafteroperationsmainlyb
ecause__________.
A.bacteriaenteredthecutsinthepatientsbodies’andinfectiontookplace
B.theconditionsinhospitalswerebad
C.theskillofsurgeonswasnotsogood
D.therewerenogoodmedicineatthattime
36.Whichtopicofthefollowingbestsuitsthepassage?
A.Operationsweredifficultinthepast
B.ThedevotionofJosephListertomedicalscience
C.Surgeryhasbecomesafer
D.Developmentsinsurgery
37.JosephListerwas________.
A.aFrenchman
B.aGerman
C.anEnglishman
D.anAmeric
XiaoLingworksveryhard.She______bytheteachers.
下列哪种色彩模式是不依赖于设备的()
MiddleSchoolstudents______nottosmoke.