æ,ֻıд°

    1.λ(F5)Խǰλн,
    2.λ(F3)Զλеκһλ,
    3.(F4)Զλеκһ,
    4.ûͨ͵λ޸𼰵λ.
        1)õλеӰť,
          λ.
        2)λõλѡλ,Ȼ,
          λ,ѡӦĻ㵥λ,.
    5.ڹб˻ϼ㼰ֽתɴд
        