汽车在有尘土的路面上行驶时,总会把路面上的尘土扬起来,这是为什么呢?众所周知,汽车都有一定的体积,它占据着的空间,实际上排开了同体积的空气.车子飞快地前进,在车身刚经过的地方,形成一个低压区;就要有空气来补充.因此,空气就由两旁和后面向这个地方涌来,形成一股涡流,空气的涡流带着路面上的灰尘,紧跟车子后面卷起一个大灰尘柱,这就是我们看到的汽车后面飞扬的尘土.这时,如果打开汽车后窗,那么空气必然 When a car is driving on a dusty road, it always lifts up the dust on the road. Why is this? As we all know, the car has a certain volume, it occupies space, and actually has the same volume of air. The car moves quickly, forming a low pressure area just past the body; it needs air to replenish it. Therefore, air flows from both sides and back to this place, forming a turbulent flow. The eddy of the air carries the road surface. Dust, followed by a large dust column rolled up behind the car, this is what we see as the dust behind the car. At this time, if you open the rear window of the car, then the air is bound to