下列血肌酐指标（单位μmol/L）属于慢性肾功能不全肾衰竭期的是（）

A.133～177

B.186～442

C.451～707

D.354～707

E.≥707

Franklin's ability to learn from observations and experience ____ greatly to his success in public life.

A．owned

B．contributed

C．attached

D．related