【单选题】On a multistage flash-type evaporator, the flash chamber is ___.
A.
combined as part of the salt water feed heater
B.
the open area above the brine levels in the first and second stages
C.
combined as part of the distillate cooler
D.
another term used to describe the vapor feed heater
【判断题】时滞(纯滞后)的产生一般是由于介质的输送需要一段时间而引起的。
【单选题】The heated feed-water entering any flash chamber of a flash-type evaporator will __.
A.
vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber
B.
vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber
C.
vaporize, with the remaining water a t a temperature greater than it entered the flash chamber
D.
boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
【多选题】一般纳税人材料的实际采购成本包括( )。
【单选题】For a flash type evaporator, the seawater heater will have to maintain a enough temperature to minimize scale formation.
【简答题】运行下面的程序,单击窗体后在窗体上显示的第一行结果是______,第三行结果是______。
【简答题】运行下面程序,单击窗体后在窗体上显示的第一行结果是_____;第三行结果是_____。 Private Sub Test(x As Integer) Dim i As Integer If x 0 Then Call Test(x - 1) Print x End If End Sub Private Sub Form_Click() Test 3 End Sub
【判断题】滚动轴承与滑动轴承相比,可用在工作转速特别高的场合。
【多选题】一般纳税人的材料采购成本应包括的内容有( )。