The girl arranged to have piano lessons at the training centre with her sister ________ she would stay

for an hour.[    ]

A. where  

B. who

C. which  

D. what

急性阑尾炎患者的非手术治疗的适应证为（）

A.化脓性或坏疽性阑尾炎

B.阑尾穿孔并弥漫性腹膜炎

C.小儿的急性阑尾炎

D.慢性阑尾炎急性发作

E.阑尾炎性包块