锁边过程中缝线被拉进工作物的情况出现原因是（）。
A.1/3
B.1/2
C.2/3
D.3/4
参考答案：B
女性，40岁。胫骨上端肿瘤切除后拟行膝关节置换，选择哪种假体为好（）。
A.髁限制型人工膝关节
B.铰链式人工膝关节
C.铰链旋转式人工膝关节
D.球臼式人工膝关节
E.后稳定型人工膝关节
Don’t believe him.He always _______ promises,but never _______ .
A．does;keeps his words
B．makes;keeps his word
C．has;makes his words
D．keeps;makes his word
