(一)
http://www.youtube.com/watch?v=x3ow0d-_BFo
http://www.youtube.com/watch?v=IW14DS1fNwU
http://www.youtube.com/watch?v=msGmhXyE1rg
http://www.youtube.com/watch?v=EZIaDbNiuuQ
http://www.youtube.com/watch?v=8wxTJi5J1kg
(二)
http://www.youtube.com/watch?v=w5wWP3mKPa8
http://www.youtube.com/watch?v=9ceQWr3NQWQ
http://www.youtube.com/watch?v=DF3OA-2WkPQ
http://www.youtube.com/watch?v=cA9dMZGXSI4
http://www.youtube.com/watch?v=kgRrTk-rh8c