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【多选题】
数列极限的【图片】—N语言定义中，关于【图片】、N的描述正确的是：A.
N随 的变小而变小；
B.
N随 的变小而变大；
C.
确定，N不唯一；
D.
是可以任意小的正数。
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a. English majors.
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c. Beginners in English study.
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【单选题】Who are the speakers?
A.
Salesman and customer.
B.
Manager and secretary.
C.
Nurse and patient.