感染性心内膜炎最常受累部位是（）
A.心脏瓣膜
B.大动脉壁内膜
C.心内膜
D.腱索
E.房室间隔缺损部位
参考答案：A
溶解乙炔气瓶充装实行固定充装单位制度。
The old buildings blend with the new ones in perfect（）so a walk along Nanking Road is an enjoyable discovery.
A.control
B.order
C.harmony
D.action
