A drop in compression pressure in one cylinder of a diesel engine can be caused by（）

A . seal the space between the piston and liner B . transmit heat from the piston to the cylinder liner C . reduce the amount of combustion gas blow-by D . all of the above

A . when the tablespace is online B . when the tablespace has segments with data in it C . when the tablespace is a default permanent tablespace for the database D . when the tablespace contains a table that is currently being used by transactions E . when the tablespace contains undo data that is needed to rollback an uncommitted transactio

A . compressor；condenser B . condenser；evaporator C . throttle valve；evaporator D . evaporator；condenser

A . low water in the expansion tank B . improperly seated valves C . low fuel oil pressure D . worn or broken cylinder liner sealing ring

A . a leaking fuel injector nozzle B . a clogged air filter C . excessively early fuel injection D . malfunctioning valve

A . the cylinder head B . the cross-head C . the moving piston D . the stationary pisto

A . Pressure and temperature decrease B . Pressure and temperature increase C . Pressure decreases and temperature increases D . Pressure increases and temperature decrease

A . You are backing up to tape and your tape device performs its own compression. B . You are making image copies, and you have not enabled tablespace compression. C . You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based backup destinations are limited. D . You are performing your backups to some device over a network where reduced network bandwidth is more important than CPU usage. E . You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves media costs and archival storage.

A . a leaking fuel injector nozzle B . a clogged air filter C . excessively early fuel injection D . malfunctioning valve

A . increased horsepower B . reduced efficiency C . increased heat loss D . lower cylinder pressure

A . clogged coolant passages B . a leaking cylinder head gasket C . low fuel oil pressure D . worn or broken cylinder liner sealing ring

A . turn the flywheel B . reduce friction C . overcome inertia D . ignite the fuel

A . evaporator B . compressor C . expansion valve D . condenser

A . evaporator B . condenser C . expansion valve D . compressor

A . improperly seating intake valves B . leaking cylinder liner seal rings C . late fuel injection timing D . carbon deposits on the pisto

A、the resistor next to the negative terminal B、a short circuit C、the resistor next to the positive terminal D、an open circuit

A . the solenoid valve to seize B . the compressor to hunt C . flash gas to form in the liquid line D . the expansion valve to freeze ope

A . worn or broken cylinder liner sealing rings B . high cooling water temperature C . worn or broken piston rings D . low fuel oil pressure

A.improperly seating intake valves B.leaking cylinder liner seal rings C.late fuel injection timing D.carbon deposits on the piston

A.low water in the expansion tank B.improperly seated valves C.low fuel oil pressure D.worn or broken cylinder liner sealing rings