下列哪项不是膝矫形的适应证（）
A.膝反屈
B.膝关节伸展不良
C.膝关节不稳
D.股四头肌麻痹
E.胫骨骨折不连接
参考答案：E
There has been a () lack of communication between the union and the management.
A. regretful
B. regrettable
C. regretting
D. regretted
论述社会保险费的负担方式。
