— What colour is your hair?
— My hair is _______________.[ ]
A. long
B. curly
C. black
答案:C
心尖区闻及隆隆样舒张期杂音,应考虑为()
A.二尖瓣关闭不全
B.主动脉瓣关闭不全
C.二尖瓣狭窄
D.肺动脉瓣狭窄
E.三尖瓣狭窄
氯碱厂常用()机来压缩氯气。