正确答案: D
            Ⅰ+Ⅱ+Ⅲ+Ⅳ 
            题目:船舶油水分离器使用管理要点是______。Ⅰ、预热温度;Ⅱ、启动时的进水速度;Ⅲ、工作时的油层厚度;Ⅳ、定期清洗。
             解析:D
 
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            学习资料的答案和解析:
                                                    
                                 
                
                 [单选题]“What _________ is today?” “It’s Sunday.”
                                                
                  
                                                                                                                                                                                                             day 
                                            
                
                
                            
                
                 [单选题]液压装置油温在( )℃以下,不允许启动。
                                                
                  
                                                                         -10 
                                                                                                                                                                                
                
                
                            
                
                 [单选题]Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by
                                                
                  
                                                                                                                     heat conduction into the water jacket wall 
                                                                                                                                    
                
                
                            
                
                 [单选题]全体船员在听到消防警报后,应在_______内赶到现场。
                                                
                  
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