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.

生化戰(zhàn)爭課的老師在課堂上問士兵們：“誰知道水的分子式？”“當(dāng)然，太簡單了?！币粋€士兵回答道?！笆鞘裁?？”“H, I, J, K, L, M, N, O.”“什么，什么？”老師又問道。“H to O，”化學(xué)專家解釋道。