◎ 题干

Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.
A.power B.limit C.control D.mercy
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.A.powerB.limitC.controlD.m…”主要考查了你对  【可数名词及其单复数】【集合名词】【名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。