基礎econ-u06-d02
Real GDP differs from nominal GDP mainly because real GDP:
A. Values output at constant base-year prices✓ 答案
B. Counts only exports
C. Excludes all services
D. Measures only output per head
解說
Nominal GDP uses current prices, so it can rise just because prices rose. Holding prices at a base year separates the volume story from the price story; services are included in both.