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
( )双向交通 ( )指路标志

A. People have different stress at work.
B. Stress always does harm to our work and health.
C. There has been a rise in stress at the workplace.
D. Sometimes stress cannot be completely prevented but it can be controlled.