已知菱形的周长为12cm ,则它的边长为( )。
3
Julie was good at German, French and Russian, all of ________ she spoke fluently. [ ]
A. who
B. whom
C. which
D. that
编写设备监理规划时,应当首先确定( )内容。
A.设备监理总目标
B.设备工程项目监理组织
C.投资、进度;质量控制
D.信息管理