送交者: skipper3 于 2005-8-09, 11:18:18:
回答: 你更该知道把问号换成感叹号的卑鄙无耻。 由 无知 于 2005-8-09, 10:52:21:
But with one condition: the weather has to be hot. When it's hot one needs to lower the vehicle windows to prevent temperature in the car from going too high, if AC is off. But keeping windows down increases the drag, especially at high speed. You end up burning more fuel in order to overcome this drag than running AC.