用天平称量药品时，由于放药品和砝码的托盘位置颠倒了，读数为 26.5克（1克以下为游码读数），则实际被称药品质量为 _____ 克．
25.5
The film __________ for ten minutes when we got to the cinema.
A． had already been on
B．had already begun
C．have already been on
D．have already begun
方程3x﹣5=7+2x移项后得 [ ]
A．3x﹣5=7﹣5
B．3x+2x=7﹣5
C．3x+2x=7+5
D．3x﹣2x=7+5
