【单选题】During purification , if the operating water tank is empty ,which of the following malfunctions will appear?
A.
some oil will flow from the water outlet of the separator
B.
there will be some water in the purified oil
C.
some oil will flow from the sludge outlet of the separator
D.
if discharging the sludge , there will be no flushing water
【简答题】已知a = 10, b = 20,则表达式!a
【简答题】水体自净(Water Self-Purification)
【判断题】导线的转折角一般采用测回法观测,对于附合导线一般观测导线的左角;闭合导线一般测量内角。()
【单选题】During purification, if the operating water tank is empty, which of the following malfunction will appear?
A.
Some oil will flow from the water outlet of the scparato
B.
There will be some water in the purifier.
C.
some oil will flow from the sludge outlet of the separator
D.
If discharging the sludge, there will be no flushing water.