— I have decided to spend my holiday in the countryside.

— _____ I'm sure you'll have a good time there. [ ]

A. Sounds wonderful.

B. Of course.

C. Let me see.

D. Well done!

当地形条件受到限制，无法安装拉线时，可用撑杆，则要求撑杆梢径不得小于160mm，与电杆的夹角以（）为最经济。

A.36°；

B.26°；

C.16°；

D.6°。