单项选择题
Which of the following best describes the thermodynamic effect on the pressure and volume relationship with regards to saturated gases?（）
A.As pressure decreases, volume increases B.As volume increases, pressure increases C.As volume decreases, pressure decreases D.As pressure increases, volume increases
单项选择题 To operate a centrifugal fire pump at reduced capacity, you should （）.
单项选择题 An AC synchronous transmission type remote steering control system consists of a （）.
单项选择题 In which of the areas listed would you expect to find the highest salt concentration in a flash evaporator?（）
