›2‹‰’†/1900(701`800)›
Ÿ‚Ώ”²‚«νƒ‚[ƒh

‘32–β–Ϊ ‰ρ“šŒ‹‰Κ‘
ŽžŠΤƒI[ƒo[I
³@‰πFdesert
Žž@ŠΤF36818•b
³‰π”F0–β

‘ζ33–β–Ϊ
“ƐθAκ”„
monopoly
profit
quantity
skill


ƒƒjƒ…[‚Φ
Δ’§ν