A—taxation system
B—taxation
C—fiscal charges
D—pr0gressive taxation
E—graduated tax
F—value added tax
G—income tax
H—land tax
I—excise tax
J—basis of assessment
K—taxable income
L—taxpayer
M—tax collector
N—gross income
O—gross profit
P—net income
Q—average income
R—national income ( )所得税 ( )纯收益

A．holding the fire damages to a minimum
B．people who have changed their attitude and behavior
C．enough fire fighters with good fire-fighting devices
D．carrying out experiments in "seeding" thunder clouds

A．At the railway station.
B．At the airport.
C．At the police station.
D．At the bank.