单项选择题 ( )的过程需要地面控制点坐标。 A. 内定向 B. 相对定向 C. 绝对定向 D. 畸变纠正

单项选择题 准备发放会议文件时，不能有多少与会者就准备多少份，要留有一定以备临时增加与会者。

判断题 Read the research article entitled 'Putting a Price on Ecosystem Services' (see Reading Text 1 in the file "Language input from reading texts") and answer the following question. The author gives social contexts. (Note: Social context refers to the environment of the society and its structure in which a particular event happened, reflecting how people interact in that environment.) A、正确 B、错误