速度!
參考答案:http://www.pconline.com.cn/pcedu/photo/10302/pic/20t12.jpg
http://www.pconline.com.cn/pcedu/photo/10212/pic/20t09.jpg
http://www.pconline.com.cn/pcedu/photo/10212/pic/20t12.jpg
http://www.hi-pda.com/forum/attachments/day_040819/7_BRa8u7nq0ote.jpg