全站仪的三轴误差是指（）
A.圆水准管轴误差
B.长水准管轴误差
C.视准轴误差
D.水平轴误差
E.垂直轴误差
参考答案：C, D, E
_____ his ability of speech, he has made use of each chance.
A．To improve
B．Improving
C．Being improved
D．Improved
钻井队沿途线路踏看排障高度为几米？
