The class is a Chinese character, and the pinyin is xué shí. According to the educational dictionary, class hours refer to the time unit of teaching. The time of a class is called a class hour. In China, a class in primary and secondary schools is generally 45 minutes, and a class in colleges and universities is 50 minutes. Also known as "class hours".

The unit of measurement of education and training time related to "class hours" is "class hours". Class hours refer to the learning time calculated by class hours. It is generally believed that both non-adult education and full-time university education are 40-minute classes. Therefore, if 30 class hours of training tasks are needed, the effective training time is 30×40= 1200 minutes, 1200/60=20 hours. In addition, we usually don't arrange a break of 10 minutes between classes.

A class is 45 minutes or 50 minutes in most cases. The time of a class is called a class hour. The detailed duration is slightly different due to school regulations. In primary and secondary schools, the school stipulates that a class lasts for 45 minutes in most cases, while in colleges and universities, such as universities, a class lasts for 50 minutes. Of course, there is another school. The university lasts for one hour and 45 minutes.

Hours of driving practice

In most cases, a class lasts for one hour, which mainly refers to the driving practice time. The next two classes and three classes start from the moment when the resident ID card is swiped, and then the resident ID card is swiped one hour later, which means that the one-hour training of this class is over. Face recognition is always carried out directly in the first and fourth classes, and people who log in directly by mobile phone have their own resident ID accounts, and each time they have corresponding class hours, so they must complete all the class hours of this item before they can take the exam.

The World Health Organization stipulates that a class lasts for 45 minutes, which is based on the degree of eye fatigue and the endurance of the cerebral cortex. The effect of human cerebral cortex is good. The duration of memory is 45 minutes. After this time, memory will decline and eyes will be tired. You should rest for two 45 minutes 10 minutes, 10 minutes, and you can relax to some extent. Take part in outdoor activities, go to the toilet and watch 5 meters.