A.s*s*s+4s*s-3s+2
B.s*s*s+4s*s+3s
C.s*s*s-4s*s-3s-2
D.s*s*s+4s*s+3s+2
房性奔马律的组成是
A.S3与S1、S2
B.病理S4与S1、S2
C.S4与S1、S2
D.S4与S2、S3
E.病理S3与S1、S2
室性奔马律的组成是
A.S3与S1、S2
B.病理S3与S1.S2
C.S4与S1、S2
D.病理S4与S1、S3
E.S4与S2、S3
A 、()()()E S R S G S =⋅;
B 、()()()()E S R S G S H S =⋅⋅;
C 、()()()()E S R S G S H S =⋅-;
D ()()()()E S R S G S H S =-。
A.S1=(S11+S12+S13+S14)/4;S2=(S21+S22)/2
B.S1=(S11+S12+S13+S14)/2;S2=(S21+S22)/2
C.S1=S11+S12+S13+S14;S2=S21+S22
D.S1=(S11+S12+S13+S14)/2;S2=(S21+S22)/4
摘要:SectionIUseofEnglishDirections:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmark[A],[B],[C]or[D]onANSWERSHEET1.(10points)ThehomelessmakeupagrowingpercentageofAmerica’spopulation.(1)homelessnesshasreachedsuchproportionsthatlocalgovernmentscan’tpossibly(2).Tohelphomelesspeople(3)independence,thefederalgovernmentmustsupportjobtrainingprograms,(4)theminimumwage,andfundmorelow-costhousing.(5)everyoneagreesonthenumberofAmericanswhoarehomeless.Estimates(6)anywherefrom600,000to3million.(7)thefiguremayvary,analystsdoagreeonanothermatter:thatthenumberofthehomelessis(8).Oneofthefederalgovernment’sstudies(9)thatthenumberofthehomelesswillreachnearly19millionbytheendofthisde
室性奔马律的组成是
A、S与S
、S
B、病理S与S
、S
C、S与S
、S
D、病理S与S
、S
E、S与S
、S
房性奔马律的组成是
A.S3与S1、S2
B.病理S3与S1、S2
C.S4与S1、S2
D.病理S4与S1、S3
E.S4与S2、S3
额外心音大多出现在
A、S之前、S
之后
B、S之前、S
之后
C、S之前、S
之后
D、S之前、S
之后
E、S之前、S
之后
室性奔马律的组成是
A.S3与S1、S2
B.病理S3与S1、S2
C.S4与S1、S2
D.病理S4与S1、S3
E.S4与S2、S3
查询选修了课程号为'C2'的学生号和姓名,若用下列SQL的SELECT语句表达时,错误的是( )。
A.SELECT S.S#,SNAME FROM S WHERE S.S# =(SELECT S C.S# FROM SC WHERE C#='C2')
B.SELECT S.S#,SNAME FROM S,SC WHERE S.S#==S C.S# AND C#='C2'
C.SELECT S.S#,SNAME FROM S,SC WHERE S.S#=S C.S# AND C#='C2' ORDER BY S.S#
D.SELECT S.S#,SNAME FROM S WHERE S.S IN (SELECT SC.S## FROM SC WHERE C#='C2')