阅读短文，然后根据首字母提示填完单词。

     Look at the child over there. His n   1    is Jim Green. He is an English b   2   . He is my new f   3   .

M   4    name is Li Ping. This is o   5    school. It's No. 2 Middle S   6   . My father is a t   7    at the

school. Jim is eleven. I'm twelve. He is in C   8    Two. We are in the s   9    class. We like our school

v   10    much.

DJ6级光学经纬仪的主要组成部分是

A．望远镜、水准管、度盘

B．基座、照准部、水平度盘

C．三脚架、基座、照准部

D．仪器箱、照准部、三脚架