正方形、等边三角形、半圆形的对称轴的条数分别是X、Y、Z，则X+Y+Z等于 请选择ABCD;~(j.f)I-F4}*[2u+}2P:^3|)R-W4M/n6l1J4I6[
A．5:^3|)R-W4M/n6l1J4I6[
B．7:^3|)R-W4M/n6l1J4I6[
C．8:^3|)R-W4M/n6l1J4I6[
D．19:^3|)R-W4M/n6l1J4I6[