在现行的九年制义务教育教材中有多处用到逻辑联结词“或”与“且”。这两个连词实质不同,不少同学在运用中极易混淆出错。为了帮助同学们准确运用这两个逻辑联结词,现特把它们放在一起找出区别,并举例说明,供大家参考。“或”表示有选择之意,若对于一个结论,条件p、q至少有一个是真的(不排除同时都是真的可能),结论成立,则用“或”把条件 In the current nine-year compulsory education teaching materials, logical conjunctions “or” and “and” are used in many places. These two conjunctions are different in substance. Many students are extremely confused and mistakes in their use. In order to help students use these two logical conjunctions accurately, we now put them together to find out the differences and give examples for your reference. “OR” means that there is a choice, if for a conclusion, at least one of the conditions p, q is true (do not rule out the possibility of both are true), the conclusion is established, then use “or” to put the condition