Steam fog is most likely to occur on the Mississippi and Ohio Rivers in().
A、spring,around late evening
B、spring,around early evening
C、fall,around early morning
D、fall,around midday
A、spring,around late evening
B、spring,around early evening
C、fall,around early morning
D、fall,around midday
A、Electro-hydraulic units B、Steam units C、Independent internal combustion power units D、All of the above