link
来源：www.coursera.org
assignment
等级：入门
chat_bubble_outline
语言：英语
card_giftcard
96分
评论
关键信息
credit_card
免费进入
timer
12小时总数
关于内容
Offered by University of Pennsylvania. Have you ever paid someone for doing you a favor? You may be accustomed to tipping wait staff or ... Enroll for free.
more_horiz
查看更多
more_horiz
收起
store
内容设计师
The University of Pennsylvania (commonly referred to as Penn) is a private university, located in Philadelphia, Pennsylvania, United States. A member of the Ivy League, Penn is the fourth-oldest institution of higher education in the United States, and considers itself to be the first university in the United States with both undergraduate and graduate studies.
您是 MOOC 的设计者？
keyboard_arrow_left
grade
keyboard_arrow_right
整合评论系统
