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
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相关考题
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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 -
单项选择题
In general, domestic flesh water tank kept under pressure by an external supply of （）.
A.forced circulating pump
B.compressed air
C.gravity tank
D.bead tank -
单项选择题
The abbreviation "TDS" about the potable water probably means （）.
A.total dissolved solids
B.temperature of distillation of sea water
C.total dissolved sodium
D.total delivery system
