阿摩線上測驗
4. Acupuncture is generally considered safe when performed by an experienced practitioner using _________ needles.
(A) fertile
(B) sterile
(C) sharp
(D) biting
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統計： A(19), B(216), C(124), D(4), E(0) #841492
統計： A(19), B(216), C(124), D(4), E(0) #841492
