240. 专用线装车后,( )负责检查车门、窗、盖、阀是否关闭妥当,需要施封的货车按规定施封,需苫盖篷布的货物,按规定苫盖好篷布。(应知应会-铁路专用线专用铁路管理办法(试行)-第28条)

答案：D

解析： (The third question): 题目解析 (Analysis of the question): 专用线装车后，( )负责检查车门、窗、盖、阀是否关闭妥当，需要施封的货车按规定施封，需苫盖篷布的货物，按规定苫盖好篷布。(应知应会-铁路专用线专用铁路管理办法(试行)-第28条) Translation: After loading on a dedicated line, ( ) is responsible for checking whether the doors, windows, covers, and valves are properly closed. Freight cars requiring sealing should be sealed according to the regulations, and goods requiring tarpaulin covering should be properly covered according to the regulations. (Knowledge required - Measures for the Administration of Dedicated Railway Lines - Article 28) 答案 (Answer): D. 企业运输员 (Enterprise transporter) Explanation: The question focuses on the responsibilities after loading on a dedicated railway line. The correct answer, D, states that the "Enterprise transporter" is responsible for checking the closure of doors, windows, covers, and valves, as well as ensuring proper sealing and tarpaulin covering for the goods. This role is vital in maintaining safety and security during transport operations on dedicated railway lines. Note: The answers and explanations provided above are based on the information given in the questions and their respective translations.