What is the standard for adjusting mirrors in Subject 3?
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Subject 3 mirrors are divided into left mirror, right mirror, and center mirror, each with different adjustment standards: Left mirror: The up and down position should place the distant horizon at the center, while the left and right position should adjust so that the car body occupies 1/4 of the mirror's range. Right mirror: Place the horizon at the 2/3 position of the mirror; then adjust the edge of the car body to occupy 1/4 of the mirror's image. Center mirror: The rear window should be positioned at the center of the mirror, and the left and right positions should be adjusted so that the left edge of the mirror just cuts to the right ear of your reflection in the mirror. The key adjustment principle is "horizon in the middle, ear at the left edge," meaning the distant horizon should be placed at the midline of the center mirror, and then adjust left and right so that the image of your right ear is at the left edge of the mirror. Additionally, different car models may require different adjustment methods; the key is to clearly see the distance between the car body and the lines, as well as the trajectory. It is important to note that when adjusting the mirrors, maintain the correct driving posture and avoid leaning forward to look at the mirrors. Otherwise, the adjusted mirror view may be inaccurate, making observation awkward and potentially affecting test performance.