80.Aspirin 藉由抑制 cyclooxygenase，阻斷下列何種物質之轉換，而使血小板不活化？
(A)phospholipid to arachidonic acid
(B)arachidonic acid to prostaglandin G2
(C)prostaglandin G2 to prostaglandin H2
(D)prostaglandin H2 to thromboxane A2

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統計： A(0), B(2), C(2), D(2), E(0) #3975779