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(2023九上·连云港开学考)
The government says that people are not n to wear masks when in safe places, such as outdoor parks and streets as w as playgrounds that are not crowded(拥挤).
The experts(专家) suggest that people don't wear masks when doing exercise e carrying out intense(剧烈的) exercises. Besides, at some areas that have low r of infection(传染) or those spaces that have good ventilation(通风), peopled don't have to wear masks, e. But when people enter some public places like undergrounds and lifts, they need to wear masks.
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