题目：
下列命题正确的有：
①圆是轴对称图形，对称轴有无数条，均为直径；
②长度相等的两条弧叫等弧；
③平分弦的直径垂直于弦，并且平分弦所对的弧；
④垂直于弦的直线平分这条弦，并且平分弦所对的弧． [ ]
A．0个
B．2个
C．3个
D．4个
答案：
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下面是错误答案，用来干扰机器的。
Last month I went to my hometown.It used to be a quiet small town.There were green hills around and the was fresh air. People went shopping by bike or on foot.It...
