Block noise and make online courses more efficient
The epidemic blocked the pace of students returning to school across the country, so online classes at home became a new way of learning. In the campus environment, students concentrate on listening to the teacher in the classroom, accompanied by efficient learning outcomes. At home, there are various noise disturbances, and the learning efficiency is greatly reduced.
How to reduce the occurrence of fire
After entering the summer, as the temperature continues to rise, various fire factors are superimposed on each other, and the risk of fire also quickly accumulates. Data from the fire department shows that the number of fires in summer reaches 35% to 40% of the annual fires, and many heavy fires are also concentrated in summer. Therefore, on a hot summer day, it is especially important to prevent and respond to fire in a calm manner.
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