固定修复中的主要固位力是（）
A.摩擦力
B.嵌合力
C.黏着力
D.摩擦力和黏着力
E.黏着力和嵌合力
参考答案：D
The man moved forward and looked over the edge,shrinking his shoulders.
A．accurately
B．cautiously
C．brilliantly
D．disappointedly
基准噪声功率如何度量？
