填空题
A--braking system
B--breakdowns
C--brick Road
D--bridge
E--bridge management system
F--broken stone surface
G--bus management information system
H--bus network
I--bus-kilometer
J--bypass road
K--cable car, cableway
L--centre line lane
M--changing lane
N--climbing lane
O---connecting road
P--control station
Q--counter flow
R--cross road;
S--direct bus
T--divided road