--- Have you finished reading the book?

--- ____. I’ll finish it next week.

A．lready

B．What a pity

C．Not yet

D．Maybe

闭合导线和附合导线在计算下列( )项差值时，计算公式有所不同。

A．角度闭合差、坐标增值闭合差
B．方位角、坐标增量
C．角度闭合差、导线全长闭合差
D．纵坐标增量闭合差÷横坐标增量闭合差