单选题 ( ) belongs to boiler combustion equipment.

单选题 The equipment for converting heat energy of working medium into mechanical energy is ( ).

单选题 Boiler steam parameters usually refer to the pressure and temperature of working medium at ( ).

单选题 The production process of thermal power plant is to convert ( ) of fuel into electric energy.

单选题 Boiler feed water first enters ( ).

单选题 The main power generation mode in China is ( ).

单选题 Boiler feed water temperature refers to the temperature of water at ( ).

单选题 ( ) belongs to boiler equipment of steam-water system.

单选题 （）is equipment for converting fuel chemical energy into heat energy.