---- What do you think of the lecture made yesterday?

---- Excellent! _______ you missed such a wonderful lecture?

A．How is it that

B．Why it was that

C．How was it that

D．When was it that

下列各种物质中，其肾清除率能准确代表肾小球滤过率的是

A．尿素

B．肌酸

C．菊粉

D．对氨基马尿酸

E．碘锐特