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
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統計： A(2), B(33), C(4), D(8), E(0) #3450030
統計： A(2), B(33), C(4), D(8), E(0) #3450030
