[填空题] 纵列式动车段（所）的缺点为（）。

In the ISM code, “company” doesnt mean（） ["the ship owner","the manager or bareboat charterer","a person assuming the responsibility for ship operation","a business enterprise dealing with freight"] 区段数字调度通信设备基于（）传输的数字通信设备，具有优良的传输性能。 调度通信是直接指挥列车运行的（）设备。 我国的濒临的海洋，从北到南依次为（） ["黄海、渤海、东海、南海","渤海、黄海、东海、南海","东海、黄海、渤海、南海","南海、东海、黄海、渤海"] Which of the following is false?（） ["A company should develop a SMS and implement it","A company implementing a SMS properly may obtain a DOC","Once a company obtains its DOC, each vessel of this company will obtain a SMC","DOC is valid for 60 months unless “major non-conformity” is found"] 纵列式动车段（所）的缺点为（）。