正确答案: A
            not be changed 
            题目:It is important that the water () very often as this can lead to increased deposits.
           
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            学习资料的答案和解析:
                                                    
                                 
                
                 [单选题]船上吊缸检修中一般不需进行()。
                                                
                  
                                                                         气缸盖、气缸套的0.7MPa水压试验 
                                                                                                                                                                                
                
                
                            
                
                 [单选题]若已知曲柄的轴线状态呈塌腰形,则其两主轴承高度必然()于相邻轴承,测得的臂距差为()值。
                                                
                  
                                                                         低/正 
                                                                                                                                                                                
                
                
                            
                
                 [单选题]拆下来的增压器滚动轴承零件应该()。Ⅰ.浸泡在干净的透平油中;Ⅱ.用蜡纸包好放置;Ⅲ.用垫块垫平平放。
                                                
                  
                                                                                                                                                                                                             Ⅰ或Ⅱ 
                                            
                
                
                            
                
                 [单选题]轴系中心线的偏差度应()。
                                                
                  
                                                                         小于允许值 
                                                                                                                                                                                
                
                
                            
                
                 [单选题]当铁梨木艉轴承产生裂纹或开裂时,可采用()方法修理。
                                                
                  
                                                                                                                                                                                                             换新或局部换新 
                                            
                
                
                            
                
                 [单选题]In the event of the cylinder starting valve leakage () would pass into the air pipes and ignite the oil deposited.
                                                
                  
                                                                                                                                                                                                             hot gase 
                                            
                
                
                            
                
                 [单选题]“Stand by engine” means ().
                                                
                  
                                                                                                                                                                 make an engine ready for starting