下列属于进度控制子系统工作的是( )。
A.绘制网络图
B.绘制横道图
C.编制多阶网络计划
D.经济法规库的查询
E.建设项目概算与预算的对比分析
参考答案:A,B,C
There are interesting books that I don't know which to read first. [ ]
A. so many
B. so much
C. such many
D. such much
请简述便利店员工举起重物时应遵循的安全规程。