扩血管药物在下列哪种疾病中慎用()。
A.二尖瓣重度关闭不全
B.二尖瓣重度狭窄
C.主动脉重度关闭不全
D.室间隔缺损
E.扩张型心肌病
参考答案:B
In china, the number of cities is increasing _____ development is recognized across the world. [ ]
A. where
B. which
C. whose
D. that
简述《杜十娘怒沉百宝箱》的故事情节。