单项选择题
According to the idea of hierarchy, clauses are based o...
问答题According to the idea of hierarchy, clauses are based on _______.
启动排烟风机后,排烟口的风速不能低于( )。A.8m/sB.9m/sC.10m/sD.11m/s
单项选择题启动排烟风机后,排烟口的风速不能低于( )。
出口日本一批纸箱包装的羽绒服(检验检疫类别为/N),报检时无须提供的单据是()。A.合同,发票,装箱单B.无木...
单项选择题出口日本一批纸箱包装的羽绒服(检验检疫类别为/N),报检时无须提供的单据是()。