制梁场必须通过铁道部()的检查验收,取得(),方可正式投产。
参考答案:产品质量监督检验中心;生产许可证
We will see to ______ that the L/C is opened within the stipulated time.
A. it B. them C. make D. let
应急预案启动后,所有施工人员必须立即撤离施工区域。