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问题 单项选择题

采用大型钢结构滑移安装施工技术施工，滑移时要确保同步，位移不同步应小于（），同时应满足结构安全的要求。

A.20mm

B.30mm

C.40mm

D.50mm

答案

参考答案：D

单项选择题

月经先后无定期的定义正确的是

A．月经周期或前或后1、2周，并连续发生3个周期以上者
B．月经周期或前或后2～3周，并连续发生 3个周期以上者
C．月经周期或前或后1～2周，并连续发生 2个周期以上者
D．月经周期或前或后1～2周，并连续发生 4个周期以上者
E．月经周期或前或后3～5天，并连续发生 3个周期以上者
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单项选择题

Consider the following statements: Statement 1: "When oligopoly firms cheat on price fixing agreements, the resulting price and output quantity approaches that of perfect competition. " Statement 2: "Monopolistic competition is inefficient because a large deadweight loss from advertising and marketing costs is a characteristic of this form of competition. " Which of the following best describes the accuracy of these statementsStatement 1Statement 2（）①A. IncorrectCorrect ②B. Correct Incorrect ③C. Correct Correct

A. ①

B. ②

C. ③
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