下列难以适应大的进度计划系统的方法是( )。
A．横道图进度计划
B．双代号网络计划
C．单代号网络计划
D．时标网络计划
参考答案：A
The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can ___ all foods are secure to us, but we are sure that the situation is turning for the better．
A．acknowledge
B．guarantee
C．identity
D．clarify
简述车货总重为13吨、23吨、37吨的正常车辆的10吨以上部分的吨公里费率及整车的车公里费率。
