Haier Company produced a new type of refrigerator of high quality and pretty appearance, its

only ___ is that it takes up too much room. [ ]

A. advantage        

B. drawback          

C. profit              

D. mistake

脓胸纤维板剥除术的适应证（）

A.病程短的慢性脓胸，肺内无病变

B.急性包裹性脓胸

C.肺内有病灶，非不能复张

D.伴支气管胸膜瘘

E.病程久，肺有纤维变性