3. According to the passage, Gorgas and Reed had previously looked for the cause of yellow fever by studying  _____.
(A)sanitary conditions
(B)mosquitoes
(C)related diseases
(D)victims of the disease

答案：登入後查看
統計： A(1), B(0), C(0), D(0), E(0) #3445721

詳解 (共 1 筆)

#6740875
1. 題目解析 這道題目要求選擇最合適的...
(共 671 字，隱藏中）
前往觀看
0
0