網址: http://thumb7.shutterstock.com/thumb_large/3955679/536858419/stock-vector-green-check-mark-icon-in-a-box-tick-symbol-in-green-color-vector-illustration-536858419.jpg
網址2: http://www.publicdomainpictures.net/view-image.php?image=7156&picture=check-in-sign
