720×56=600（千克）；
还剩：720-600=120（千克）；
答：卖出了600千克，还剩120千克．
Tom's parents banned him ______ playing computer games. [ ]
A. to
B. from
C. of
D. in
股权式合资结构中，公司的股东对公司承担的责任以( )为限。
A．注册资金额
B．资产
C．负债
D．所有者权益
