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[单选题]
某位移测量系统中,位移测量仪表的量程为100-800mm,采用8位A/D转换器转换后输出为0AH-64H,若A/D转换器输出的数字量37H,此对应位移为()
A.420mm
B.450mm
C.466mm
D.480mm
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A.420mm
B.450mm
C.466mm
D.480mm
A.①、②、③、④、⑤
B.②、③、④、⑤
C.①、③、④
D.①、②、③
A.0%
B.50%
C.—50%
D.150%
A . 0~1
B . 0~1.6
C . 0~2.5
D . 0~4.0
采用单向测距三角高程测量进行垂直位移监测,影响监测精度的因素有()
A测角误差
B测边误差
C仪器高和目标高量测(补充1)误差
D地球曲率取值误差
E大气折光系数取值误差