答案:垂直
答案:垂直
A. (A)1/500
B. (B)1/1000
C. (C)1/1500
D. (D)1/5000
A. (A)干砌片石
B. (B)浆砌片石
C. (C)混凝土
D. (D)石笼
A. (A)±20℃
B. (B)±15℃
C. (C)±10℃
D. (D)±5℃
A. (A)4500mm
B. (B)5500mm
C. (C)6200mm
D. (D)6550mm
A. (A)160mm
B. (B)180mm
C. (C)200mm
D. (D)220mm
A. (A)刻度放大镜
B. (B)望远镜
C. (C)经纬仪
D. (D)光电测距仪