单项选择题

A.TRX-DwPTS=TTX-UpPTS-2△tp+192TC
B.TTX-UpPTS=TRX-DwPTS-2△tp+192TC
C.TTX-UpPTS=TRX-DwPTS-△tp+96TC
D.TTX-UpPTS=TRX-DwPTS-2△tp+96TC