阿摩線上測驗
14. Participants in the clinical trial were required to abide _____ strict protocols to ensure the validity and reliability of the results.
(A) at
(B) by
(C) from
(D) with
答案：登入後查看
統計： A(2), B(23), C(1), D(5), E(0) #3450030
統計： A(2), B(23), C(1), D(5), E(0) #3450030
