====Slide 21-28====


{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_021.png?nolink&800 |}}
{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_022.png?nolink&800 |}}
{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_023.png?nolink&800 |}}
{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_024.png?nolink&800 |}}
{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_025.png?nolink&800 |}}
{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_026.png?nolink&800 |}}
{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_027.png?nolink&800 |}}
{{ :pictures:hundununiv:lishanyou_2nd_curve:slide_028.png?nolink&800 |}}