Kangkang has learned over ________ English words for two years.

A. five thousand, eight hundreds and sixty-five   

B. five thousands, eight hundred and sixty-five

C. five thousand, eight hundred and sixty-five

脚手架设计计算包括（）。

A.纵向、横向水平杆等受弯构件的强度和连接扣件的抗滑承载力计算

B.立杆的稳定性计算

C.连墙件的强度、稳定性和连接强度的计算

D.立杆地基承载力计算

E.破坏性计算