髌骨软化症的肌力训练（）。

A.以训练阔筋膜张肌、股二头肌为主

B.以训练内收肌、半腱肌和半膜肌为主

C.以提高股四头肌训练为主，禁忌腘绳肌的等张肌力训练

D.重点增加股内侧肌肌力，减少伸膝时髌骨的外移或外旋

E.以提高腘绳肌肌力训练为主，禁忌股四头肌的等张肌力训练

The teacher uses the ______ language of the students as the main medium in teaching in a Grammar-Translation classroom.