沒學好的書信用法，要用時臨陣磨槍一下。
邀請信:
http://tw.search.yahoo.com/r/_ylt=A2oKmJsHK4ZSEhAAlndr1gt.;_ylu=X3oDMTE2bWVjNjZ0BHNlYwNzcgRwb3MDNgRjb2xvA3NnMwR2dGlkA1ZJUFRXNDNfNDYx/SIG=17b2faan8/EXP=1384553351/**http%3a//cgelh.csu.edu.tw%3a88/%25E5%2591%2582%25E7%25AB%258B%25E5%25BE%25B7/%25E5%25AF%25A6%25E7%2594%25A8%25E4%25B8%25AD%25E6%2596%2587%25E6%2595%2599%25E5%25AD%25B8/%25E9%2582%2580%25E8%25AB%258B%25E5%2587%25BD.ppt
'via Blog this'
