根据题意得:2m=1,
解得:m=12.
故选C.
We very much regret that we fail to complete the work( )the agreed contract time.
A.within
B.at
C.in
D.for
在《国家电网公司输变电工程标准工艺管理办法》中,对“标准工艺”是如何描述的?