[填空题]

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

（）城市人口（）人口质量

[简答题]
1 Population ecology is the science that measures changes in population size and composition and identifies the causes of these fluctuations．Population ecology is not concerned solely with the human population．In ecological terms．a population consists of the individuals of one species that simultaneously occupy the same general area．rely on the same resources, and are affected by similar environmental factors．The characteristics of a population are shaped by its size and by the interactions among individuals and between individuals and their environment．
2 Population size is a balance between factors that increase numbers and factors that decrease numbers．Some factors that increase populations are favorable light and temperature，adequate food supply, suitable habitat, ability to compete for resources, and ability to adapt to environmental change．Factors that decrease populations are insufficient or excess

[单项选择]
1 Population ecology is the science that measures changes in population size and composition and identifies the causes of these fluctuations．Population ecology is not concerned solely with the human population．In ecological terms．a population consists of the individuals of one species that simultaneously occupy the same general area．rely on the same resources, and are affected by similar environmental factors．The characteristics of a population are shaped by its size and by the interactions among individuals and between individuals and their environment．
2 Population size is a balance between factors that increase numbers and factors that decrease numbers．Some factors that increase populations are favorable light and temperature，adequate food supply, suitable habitat, ability to compete for resources, and ability to adapt to environmental change．Factors that decrease populations are insufficient or excessive
A. Any species of life can be studied in population ecology．
B. Population ecologists care about the future of humanity．
C. The growth of the human population is a major concern．
D. Population ecology does not consider humans worthy of study．

[简答题]种群(population)

[单项选择]Which state has the largest population

[填空题]How is our population formed intellectually

[填空题]Slower population increase is largely responsible for the slight slowdown in the growth of the labor force.