问题 单项选择题

水准仪i角是指()在竖直面上的投影夹角

A.纵丝与视准轴

B.管水准轴与视准轴

C.管水准轴与横丝

D.视准轴与圆水准器轴

答案

参考答案:B

多项选择题
改错题

We had guests last night who have not stayed                                               1.       

in a B&B hotel ago.They did not want breakfast                                                 2.       

because that they were going out early in the                                                       3.       

morning.They came back lately and had some                                              4.       

tea.I came into the living room and saw one of                                             5.       

them just to through the kitchen door but turn                                              6.       

on the light.He was looking for a glass the                                                   7.       

cupboard.He had no ideas that the kitchen was                                              8.       

not for guests.I just smiled to me and thought,                                              9.       

“What can I do?We are guests after all.”                                                      10.