The doctor vacillated so frequently on disease-prevention techniques that his colleagues accused him of inconsistency.

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问题 The doctor vacillated so frequently on disease-prevention techniques that his colleagues accused him of inconsistency.

选项 A、wavered
B、instigated
C、experimented
D、relied

答案A

解析 这个医生在疾病预防技术上如此摇摆不定,以至于他的同事都指责他变化无常。vacillate“摇摆,犹豫”,A选项waver与其同义。instigate“教唆,煽动”,experiment“实验”,rely“依赖”。
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