下列命题正确的是（ ）
- A.无穷小量的倒数是无穷大量
- B.无穷小量是以零为极限的变量
- C.无界变量一定是无穷大量
- D.无穷小量是绝对值很小很小的数
正确答案及解析
正确答案
解析
A项：无穷小量（除去零）的倒数是无穷大量.B项：无穷小量是以零为极限的变量.C项：无界变量不一定是无穷大量，但无穷大量是无界变量.D项：无穷小量不是绝对值很小很小的数（除去零），绝对值很小很小的“数”其极限值不一定为零.
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