What ______ me most was not what he told me but why he looked at me in _______ all the time.

A．surprised; a surprise

B．surprised; surprise

C．surprising; surprise

D．surprises; a surprise

中静脉的特点，除外（）

A.管壁由内、中、外三层膜构成

B.内膜薄，内弹性膜不明显

C.外膜厚于中膜，有少量纵行平滑肌

D.中膜不发达，只有几层疏松的平滑肌

E.三层膜分界清楚