After the new equipment was introduced，they produced ________machines this year as the year before.

A．as twice many

B．as many twice

C．twice as many

D．twice many as

用全站仪施测地物时，若棱镜偏离地物中心点大于（）时，应加偏心距改正。

A、3cm；

B、5cm；

C、8cm；

D、10cm。