For years an acrimonious debate over how to protect heroin users has impeded eff

游客2025-01-28 8

问题 For years an acrimonious debate over how to protect heroin users has impeded efforts in the U.S. to control the spread of AIDS.

选项 A、convoluted
B、belied
C、stoked
D、encumbered

答案 D

解析句意：几年来关于如何保护海洛因吸食者的激烈辩论阻碍了美国为控制艾滋病传播而付出的努力。impede(阻止)；encumber(阻碍)；convolute(旋绕)；belie(掩饰)；stoke(添燃料)。

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