【单选题】现行的国际标准化组织150模数协调标准是以哪个国家标准为蓝本改进完成的?
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【单选题】现行的国际标准化组织150模数协调标准是以哪个国家标准为蓝本改进完成的?
【多选题】Non-conference lines have posed a challenge to the conference system. This is mainly attributable to( ).
A.
the development of containerization
B.
emergence of many independent carriers
C.
the expansion of international trade
D.
the development of different modes of transport