有理数是正整数、负整数、正分数、负分数和零的统称,此有理数概念的定义方法是(  ).

有理数是正整数、负整数、正分数、负分数和零的统称,此有理数概念的定义方法是(  ). A.递归定义 B.关系定义 C.处延定义 D.发生关系

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What did Americans think of the car at first?

What did Americans think of the car at first? A.It was expensive. B.It was unnec

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What will the mother bear do when the babies do not listen t

What will the mother bear do when the babies do not listen to her? A.She will li

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What did the man do last night?

What did the man do last night? A.He gave a party. B.He visited friends. C.He we

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I love Madonna's songs very much.She is my ________singer.

I love Madonna's songs very much.She is my ________singer. A.Famous B.Favourite

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