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A.China B.ChinaBeijing C.Beijing D.BeijingChina已知char s……

已知char s1[20]="china",char s2[20]="Beijing",执行语句pine("%s",strcat(s1,s2));后,则在屏幕上显示的内容是( )

A.China
B.ChinaBeijing
C.Beijing
D.BeijingChina
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