颞下颌关节疾病中最常见的是
A．关节紊乱病B．感染C．肿瘤D．外伤E．关节强直
参考答案：A
你能找出下列句中的错误吗？选出来并改一改。
( ) 1. Amy arms are shorter than mine. ________________
A B C
( ) 2. My hands is bigger than his. ________________
( ) 3. I'm taller and heavyer than you. ________________
( ) 4. He tail is longer. ________________
( ) 5. Amy is my friends. ________________
常用的膜剂材料（）
A.聚乙烯醇
B.胆固醇
C.二甲硅油
D.可可豆脂
E.EUDRAGIT
