与普通桩冠相比，桩核冠的优点为（）
A.固位好
B.强度好
C.易制作
D.可用于咬合紧时
E.作固定桥固位体时易形成共同就位道
参考答案：E
—The lights in the classroom are still on. Do you know______.
—To revise for the coming exams.
A．what they stay up late for
B．why they stay out late
C．when will they stop studying
D．how they work on their lessons
HLA-B27、亚型HLA-B2704抗原相关()HLA-B5、HLA-B51抗原相关()HLA-DR4、HLA-DRw53抗原相关()
A．Behcet病
B．Vogt-小柳原田综合征
C．关节强直性脊椎炎伴发的葡萄膜炎
D．交感性眼炎
E．Fuchs虹膜异色性葡萄膜炎
