λmean=0.5λ0
λmean=1.0λ0
λmean=2.0λ0
λmean=2.5λ0
λmean=3.5λ0
第1题:
X线平均波长(λmean)与最短波长(λmin)的关系,正确的是
A、λmean=3.5λmin
B、λmean=3.2λmin
C、λmean=2.8λmin
D、λmean=2.5λmin
E、λmean=2.2λmin
第2题:
X线平均波长(λmax)与最短波长(λmax)的关系,正确的是
A.λmean=3.5λmin
B.λmean=3.2λmin
C.λmean=2.8λmin
D.λmean=2.5λmin
E.λmean=2.2λmin
第3题:
The soundings on the chart are based on the depth of water available at ______.
A.mean low water
B.mean lower low water
C.mean high water
D.mean high water springs
第4题:
The average height of the surface of the sea for all stages of the tide over a 19 year period is called ______.
A.mean high water
B.mean low water
C.half-tide level
D.mean sea level
第5题:
X线摄影用线量最强波长的计算公式为
A.λmin=1.24/kVp(nm)
B.λmin=12.4/kVp(nm)
C.λmean=2.5λmin(nm)
D.λmax=1.5λmin(nm)
E.λmax=2.0λmin(nm)
第6题:
X线摄影用最短波长的计算公式为
A.λmin=1.24/kV(nm)
B.λmax=1.2~1.5λmin(nm)
C.λmean=2.5λmin(nm)
D.λmax=2λmin(nm)
E.λmin=12.4/kV(nm)
第7题:
X线平均波长与最短波长(λ0)的关系是()
第8题:
接入信道中,导频信道的开环输出功率为mean pilot channel output power,数据信道的开环输出功率为meandatachanneloutputpower,则接入信导前缀中的导频信道输出功率为()
第9题:
λmean=3λmin
λmean=2.5λmin
λmean=2λmin
λmean=1.5λmin
λmean=λmin
第10题:
λmean=0.5λ0
λmean=1.0λ0
λmean=2.0λ0
λmean=2.5λ0
λmean=3.5λ0
第11题:
λmin=1.24/kV(nm)
λmax=1.2~1.5λmin(nm)
λmean=2.5λmin(nm)
λmax=2λmin(nm)
λmin=12.4/kVp(nm)
第12题:
λmin=1.24/kVp(nm)
λmax=1.5λmin(nm)
λmean=2.5λmin(nm)
λmax=2λmin(nm)
λmin=12.4/kVp(nm)
第13题:
X线平均波长(λmean)与最短波长(λmin)的关系是
A.λmean=3λmin
B.λmean=2.5λmin
C.λmean=2λmin
D.λmean=1.5λmin
E.λmean=λmin
第14题:
A.mean pilot channel output power-mean data channel output power
B.mean pilot channel output power+mean data channel output power
C.mean pilot channel output power-0.5*mean data channel output power
D.mean pilot channel output power+0.5*mean data channel output power
第15题:
X线最强波长与最短波长的关系是
A.λmax=0.5λ0
B.λmax=1.5λ0
C.λmax=2.0λ0
D.λmax=2.5λ0
E.λmax=3.5λ0
第16题:
The reference datum used in determining the heights of land features on most charts is ______.
A.mean sea level
B.mean high water
C.mean low water
D.half-tide level
第17题:
X线平均波长与最短波长(Xo)的关系是
A.λmean=0.5λ0
B.λmean=1.0λ0
C.λmean=2.0λ0
D.λmean=2.5λ0
E.λmean=3.5λ0
第18题:
第19题:
在X线管发射的X线束中最强波长λmax是最短波长λmin的()倍,平均波长λmean是最短波长的()倍。
第20题:
Greenwich Mean Time
Gross Mean Time
Great Mean Time
Gross Metric Ton
第21题:
第22题:
λmean=3.5λmin
λmean=3.2λmin
λmean=2.8λmin
λmean=2.5λmin
λmean=2.2λmin
第23题:
mean pilot channel output power-mean data channel output power
mean pilot channel output power+mean data channel output power
mean pilot channel output power-0.5*mean data channel output power
mean pilot channel output power+0.5*mean data channel output power
第24题:
m
4/3m
3/2m
5/3m
2m