等腰三角形的对称轴有请选择ABCD8x+n5n/\0j+M3L3j-w5o8}'l(L6T'V0{1z:_,a+I,m6O,h7w1g9O
A.1条0{1z:_,a+I,m6O,h7w1g9O
B.2条0{1z:_,a+I,m6O,h7w1g9O
C.3条0{1z:_,a+I,m6O,h7w1g9O
D.4条0{1z:_,a+I,m6O,h7w1g9O