There ________. And here ________.

A．goes the phone; she comes　

B．is the phone going; is she

C．does the phone go; does she come　

D．the phone goes; come she

步行周期中在支撑相最易发生异常的时期是（）

A.首次触地

B.承重反应期

C.支撑相中期

D.支撑相末期

E.足趾离地期