问题
选择题
4．Politeness is a(n) ____ phenomenon among all the social groups, but it is marked by different cultures.
A．steady
B．complete
C．universal
D．Original
答案
答案：C
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4．Politeness is a(n) ____ phenomenon among all the social groups, but it is marked by different cultures.
A．steady
B．complete
C．universal
D．Original
答案：C
z C(g)的反应达到平衡。