单项选择题
A.the temperature B.the viscosity C.the gravity D.the size
In a domestic fresh water system, the pump starters are...
单项选择题In a domestic fresh water system, the pump starters are controlled by （） switches which operate when the pressure in the tank varies within predetermined limits as water is drawn off.
A.water level B.water flow C.temperature D.pressure
Distilled water is now largely used on board, this may ...
单项选择题Distilled water is now largely used on board, this may be corrosive (due to presence of dissolves CO2) and （） to the taste.
A.flat B.slat C.sweet D.acid
The domestic fresh water pump starters are controlled b...
单项选择题The domestic fresh water pump starters are controlled by pressure switches which operate when the pressure in the tank varies within predetermined limits as water is drawn offThe word “which” means （）.
A.starters B.pressure switches C.pressure D.water
