题目内容
经纬仪的主要轴线应满足的几何条件有
查看答案
搜索结果不匹配？点我反馈
更多问题
测量竖直角时，采用盘左、盘右观测，可以消除的误差有
整理竖直角观测记录（将计算数据填在对应的表格里）注：此经纬仪盘左时，视线水平，指标水准管气泡居中，竖盘读数为90°，上仰望远镜读数减小。
整理水平角观测记录（将计算数据填在对应的表格里）
Directions: In this section you will hear a recorded short passage. The passage is printed in the test paper, but with some words or phrases missing. The passage will be read three times. During the second reading, you are required to put the missing words or phrases on the Answer Sheet in order of the numbered blanks according to what you hear. The third reading is for you to check your writing. Now the passage will begin.I’m Wang Hong, a tour guide at Discovering China. I’ve been working as a tour guide for more than 10 years. My father was _____20____, too. I learned a lot from him. I ____21____ being a tour guide. I’ve ____22____ to many places in China and abroad in the past 10 years. Every day is a challenge for me, working with different people, but it is ____23____ and rewarding. I love working with people from different places. China has rich tourism resources and I am still ____24____ to explore its wonderful natural scenery.
微信支付 
支付宝支付