某同学用托盘天平称量时,将样品与砝码的位置放颠倒了,待平衡时称样品的质量为10.5g,则样品的实际质量为( )
A:10.5 g
B:10.0 g
C:9.5 g
D:11.0g
He isn't such a man ______ he used to be.