支气管哮喘患者常出现的是（）
A.呼气性呼吸困难
B.吸气性呼吸困难
C.混合性呼吸困难
D.Kussmaul呼吸
E.间停样呼吸
参考答案：A
Had they known what was coming next, they second thoughts.
A．may have
B．could have
C．must have had
D．might have had
滤液水内固形物含量为0.03g/L左右。
