容易变形的图形是请选择ABC)|5Y-i8f:~-[-Q0Y9S2Q;\0x*u(D-z-Q(Y:Q
A．直角三角形-Q0Y9S2Q;\0x*u(D-z-Q(Y:Q
B．平行四边形-Q0Y9S2Q;\0x*u(D-z-Q(Y:Q
C．等腰三角形-Q0Y9S2Q;\0x*u(D-z-Q(Y:Q