题目

根据材料内容选择最佳答案，并将其标号填入题前括号内。“Can I see my baby?” the happy new mother asked. When she saw the baby, she was surprised. The baby was born without ears.As time went by, the baby grew up. There was nothing wrong with his hearing. But some kids laughed at him because he didn’t have ears. The baby was very sad, but his parents did nothing but felt sorry for him.The boy’s father talked with a doctor. “Could nothing be done?” the father asked. “ I believe I could give him a pair of outer ears, if they could be got.” The doctor answered玻璃在200℃时熔化，当温度升到300℃时还没有熔化完，由此可知（　　）A．玻璃变大了B．玻璃是晶体C．玻璃是非晶体D．玻璃难熔化