It is only when a football player has aged and been through many battles ________ he learns an important lesson: there is no “I” in “team”.

A．after

B．before

C．what

D．that

以统计图表示各科室住院患者的构成情况，可选用()

A.条图

B.百分比条图

C.直方图

D.普通线图

E.圆图