垂直位移观测的测点有哪几级?
参考答案:
有水准基点、起测基点、垂直位移标点三级。
10岁()
A.40~45120~140
B.30~40110~130
C.25~30100~120
D.18~2070~90
E.50~60130~140
- Have you finished your composition yet? -- No, I'll finish it in ten minutes.
A.another
B.more
C.other
D.else