The four great inventions of ancient China are(),(),(), and().(按照答案首字母顺序填写,每个答案之间空一格,不加标点符合)


The four great inventions of ancient China are(),(),(), and().(按照答案首字母顺序填写,每个答案之间空一格,不加标点符合)

正确答案:compass gunpowder papermaking printing