我国现存最早的目录学文献是东汉班固所著的（1），它是在西汉刘向、刘歆父子的（2）和（3）基础上编纂而成的

A. Increases in the costs to produce
B. Lower labor costs
C. Lower prices for raw materials
D. Higher tax discounts on products

A. Demand-pull inflation
B. Cost-push inflation
C. Per-worker productivity
Deflation

A. Production capacity
B. Spending
C. Taxes
D. NNP(Net National Product)