某施工单位与业主签订了某工程施工合同,批准的施工进度网络图如下图所示(时间单位),假定各项工作匀速施工。 答题时,单个小题有多个填空内容,中间用“;”分隔。 (1)工期是 () : (2)关键线路是 ( 以节点编号依次写出,如:1-2-3) : (3)计算以下工作的时间参数:() ES D = EF D = FF D = LS H = LF H = TF H = EF F =
【简答题】From 1990 to 2010, more than ______________ people in China moved from rural areas into cities. Average ____________ yearly growth (of migration).