阿摩線上測驗
12. Walter Reed, a U.S. Army medical officer, daringly conducted experiments to determine how yellow fever was transmitted.
(A) scientifically
(B) courageously
(C) methodically
(D) knowingly
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統計： A(6), B(22), C(10), D(3), E(0) #1098221
統計： A(6), B(22), C(10), D(3), E(0) #1098221