确定企业向养老金计划缴纳部分有三种方法，即：（）、利润分享法、股票奖金法
参考答案：固定比例法
–Could you please tell me _______? --Yes. They are playing in the park.
A．where are the twins
B．where the twins are
C．where were the twins
D．where the twins were
如图，轻质杠杆的支点在0点，在杠杆A点用力F1竖直向上拉．请画出拉力F1的力臂和作用在杠杆上阻力F2的示意图．
