8. 供給創造其自身的需求 (production creates its own demand) 為:
(A)賽依法則 (Say’s law)
(B)國王法則 (King’s law)
(C)皇后法則 (Queen’s law)
(D)查理法則 (Richard’s law)

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統計: A(55), B(0), C(0), D(3), E(0) #1792803