半影的表示方法哪项正确()?
A.P90%-10%
B.P90%-20%
C.P80%-10%
D.P95%-10%
E.P95%-20%
参考答案:A
— I only heard of John,but I never met him.What is he like?
— ______________.
A.He is from America.
B.He speaks English well.
C.He is kind and strong.
D.He is my best friend.
小儿哮喘若急剧严重发作,经合理应用拟交感神经仍不能在12小时内缓解,称为哮喘持续状态。