碱烧伤时使用维生素C的作用机制及用法?
参考答案:
维生素C可抑制胶原酶,促进角膜胶原合成,可全身及局部大量应用。在伤后做球结膜下注射,每次2ml,每日1次。
She knew nothing about his journey _______ he was likely to be away for three months.
A.Except
B.except for
C.except that
D.in addition
摄氏温标、华氏温标和凯氏温标三种之间有何关系?