下列物质所用的高分子材料，你认为具有热固性的是请选择DCBA't9`5X/k-q4D3a:@)h,k/e5Z8U*n+f'D6|0l1S(y5U3Y
A．塑料凉鞋,k/e5Z8U*n+f'D6|0l1S(y5U3Y
B．自行车内胎,k/e5Z8U*n+f'D6|0l1S(y5U3Y
C．电线外面的塑料护套,k/e5Z8U*n+f'D6|0l1S(y5U3Y
D．电视机外壳,k/e5Z8U*n+f'D6|0l1S(y5U3Y