【单选题】【消耗次数：1】
Not until the early years of the 19th century ____ what heat is.
①
man knew
②
did man know
③
man did know
④
didn’t man know
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相关题目
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①
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随机题目
【单选题】
审计风险模型错误的是?
①
审计风险=重大错报风险X检查风险
②
重大错报风险=固有风险×控制风险
③
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④
审计风险=重大错报风险+检查风险