Kerley B线最常见于哪种疾病（）
A.肺癌
B.肺结核
C.心房间隔缺损
D.二尖瓣狭窄
E.慢性支气管炎
参考答案：D
Those flowers were ___________ for your mother on her seventieth birthday, but as she is away, I would be glad if you accept them.
A．devoted
B．produced
C．meant
D．supplied
（滴定分析）简述滴定分析法
