1. The occurrence of overpopulation in China.
2. Why China’s overpopulation occurs.
3. The implementation of birth control in China.
A--overpopulation
B--under population
C--working population
D--population waiting for employment
E--urban population
F--rural population
G--population reproduction
H--population increase
I--population decrease
J--population base
K--population distribution
L--population density
M--population quality
N--population pyramid
O--population statistics
P--population theory
Q--population studies
我来回答: