题目

下列说法：①如果两个数的和为1，那么这两个数互为倒数；②如果两个数积为0，那么至少有一个数为0；③绝对值是其本身的有理数只有0；④倒数是其本身的数是，0，1；⑤一个数乘就是它的相反数；⑥任何一个有理数a的倒数是．其中错误的个数是（ ）A.1 B.2 C.3 D.4 答案：【答案】D【解析】根据倒数的概念、有理数乘法法则、绝对值的概念，相反数的概念进行判断即可.解：如果两个数的积为1，那么这两个数互为倒数，①错误；如果两个数积为0，那么至少有一个数为0，②正确；绝对值等于其本身的有理数是0和正有理数，③错误；倒数等于其本身的有理数只有1和，④错阅读理解       Hello, I am Linda. I have a big family. They are my grandfather, grandmother, uncle, aunt, father, mother, cousin and me. My uncle likes sports. He has a great sports collection. He has three volleyballs and two soccer balls. My aunt like music. She has many CDs and tapes. My cousin likes playing computer games and eating fruit. He eats a lot every day. I like reading. I have many books. I love my family.1. There are ____people in the family.2. Linda's uncle has ____balls.3. Linda's aunt has                          .4.                 likes playing computer games and eating fruit.5. Linda likes ____.