Mean high water is the average height of（）. ["The higher high waters","The lower high waters","The lower of the two daily tides","All high water"]
当市电电压为35kV时，应采用（）的变压器。 ["35kV\/20kV","35kV\/10kV","35kV\/0.4kV","35kV\/220V"]
天然气脱硫，主要是指脱除天然气中的（）、有机硫化合物和（）。
Mariners not entering the port are（）to keep at least one mile off. ["Advised","Reported","Complied","Supplied"]
按照作用在尘粉上的不同作用力来分，有几种除尘装置？
除尘设备分哪几类？
