A) regulations B) rules C) disciplines D) principles

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A) regulations

B) rules

C) disciplines

D) principles

参考答案:

BB[试题分析]名词近义词辨析题。[详细解答] regulation n.规则,规章;rule n.规则,惯例; discipline n.纪律;学科;principle n.法则,原则,原理。显然,填入rules符合句意,故答案为B。