支气管动脉栓塞后，最严重的并发症是（）
A.肋间胸痛
B.胸骨后烧灼
C.呼吸困难
D.吞咽困难
E.脊髓损伤
参考答案：E
Jim usually ______ his homework in the evening, but he ______ books now.
A. does; reads B.is doing; is reading C. does; is reading
墙体保温材料属于建筑装修材料。
