[多选题]下列关于精密光电测距三角高程测量技术要求正确的是( )。【该题涉及2.3内容】 A.应采用往返测 B.应测量定气温和气压 C.测量过程中无需进行气象和仪器加、乘常数改正 D.仪器标称精度不应低于0.5″、1mm+1ppm。 E. 应采用两台全站仪同时对向观测,不量取仪器高和觇标高。
参考答案:ABDE
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