15.6 SAMPLEPUBLIC SIGNS
Sample 15（1）:Public Signs about Proper Behavior
Sample 15（2）:Public Signs Guiding People Where to Go
Sample 15（3）:Public Signs Telling People of Their Rights
(https://www.daowen.com)
Sample 15（4）:Public Signs Telling People What to Do
Sample 15（5）:Public Signs Telling People What Not to Do
Sample 15（6）:Public Signs Indicating Special Places
(https://www.daowen.com)
