An instructor in chemical warfare asked soldiers in his class: "Anyone knows the formula for water?"
"Sure. That‘s easy," said one man. "What is it?" "H, I, J, K, L, M, N, O." "What, what?" reasked the instructor. "H to O," explained the chemistry expert. ps: 新做一个网站：名言佳句： https://quotes.go2live.cn/, 请君欣赏。