問題詳情
19. All researchers should be familiar ________ the basic ethical principles and have up-to-date knowledge aboutpolicies and procedures designed to ensure the safety of research subjects.
(A)in
(B)to
(C) with
(D)as
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)