![no such thing as a free lunch , and the big](http://Home.qiandianju.com/images/4.jpg)
no such thing as a free lunch , and the big
During lunch, the children lined up at an interval of 1 meter to wash their hands at an interval faucet, and the teacher in the main class instructed them to wash their hands in seven steps. after washing their hands, they were dried with towels (one person, one towel, and the towels were sterilized every…