题目

任何自然数都有倒数。 (_____) 答案:【答案】×【解析】倒数的认识解:根据倒数的定义可得:0和任何数相乘都得0,所以0没有倒数,与题意不符.所以所有自然数都有倒数说法错误.故答案是:错误.直接运用倒数的意义解答.注意0没有倒数.Why didn’t you tell me there was no meeting today? I ________ all the way here ________ the heavy snow.A.needn’t have driven; throughB.needn’t drive; acrossC.didn’t need to drive; throughD.shouldn’t have driven; across
数学 试题推荐