你可能感興趣的試題

單項(xiàng)選擇題

For a flash type evaporator, the seawater heater will have to maintain a enough temperature to minimize scale formation（）

A.lower
B.higher
C.low
D.high

單項(xiàng)選擇題

The flash-evaporator is different with the submerged-tube evaporator in that for the former（）

A.Water is heated into vapor on heating surfaces
B.Water is vaporized by pressure difference
C.There are no heating-transfer surfaces
D.There are more heating-transfer surfaces