你可能感興趣的試題

When collecting condensation for drinking water，（）.

A.a sponge used to mop up and store condensation must be kept salt free
B.only condensation on the bottom of the canopy should be collected
C.it should be strained through a finely woven cloth
D.chlorine tablets should be used to make it drinkable

單項(xiàng)選擇題

When choosing extinguishers to fight a Class “B” fire do NOT use（）.

A.carbon dioxide
B.dry chemical
C.foam (stored-pressure type)
D.water (cartridge-operated)

When loading or discharging dry mud or cement，crew members should use goggles and（）.

你可能感興趣的試題

When collecting condensation for drinking water，（）.

When choosing extinguishers to fight a Class “B” fire do NOT use（）.

When collecting condensation for drinking water，（）.