【多选题】下列关于钢尺精密量距的说法中正确的有( )
C.
精密量距时对丈量结果应进行尺长、温度和倾斜三项改正;
【单选题】听力原文:M: Hello, this is Cad's bookstore. We found Mr. Wood's wallet and identity card here after he left his car this morning. W: He has been wondering where he could have left them. He'll pick them up...
A.
Only Mr. Wood's wallet was lost.
B.
He'll pick up his wallet and identity card at the bank.
C.
He'll not go to the bank and the post office.
D.
He'll pick up his wallet and identity card.
【多选题】下列关于钢尺精密量距的说法中正确的有()
B.
用视距法测量水平距离和高差时,需要用经纬仪观测的数据是仪器高
D.
精密量距时对丈量结果应进行尺长温度和倾斜三项改正
【单选题】图示电路在开关 S 闭合后的时间常数 值为 ( ) 。
【判断题】钢尺精密量距的方法中定线用目估定线的方法。