A. --4th ring Rd
B. --Foggy Area
C. --Ticket changing
D. --Emergency vehicle lane
E. --Ticket office
F. --Two way traffic
G. --Dangerous Area
H. --Non-motor vehicle
I. --Side Rd
J. --Group tour entrance
K. --Guide sign
L. --Roundabout
M. --Crosswalk
N. --Crossroad
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A. why stress is not harmful
B. how to get rid of stress at work
C. how to improve the effectiveness by having stress
D. why people should have stress at work and how to control it at an appropriate level