期间费用不计入产品成本，而直接计入当期损益。 ( )
参考答案：对
1，3，7，15，31，( )
A．48B．56C．63D．72
After he had played on the football field one game daily for a week, his strength seemed to have ______.
A．put out
B．got out
C．gone out
D．run out
