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(A)0.2
(B)0.4
(C)0.6
(D)0.8

答案：登入後查看
統計： A(6), B(10), C(88), D(5), E(0) #1227616

詳解 (共 1 筆)

#2873589
(1.2mg/10mg)/(0.4mg/20mg)=0.6
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