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【单选题】
有关驱动轴检查不正确的叙述是A.
检查驱动轴是否有变形损坏
B.
检查驱动轴护套是否开裂破损
C.
检查油脂是否有渗漏
D.
检查螺帽是否紧固
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举一反三
【单选题】Which of the following arguments about the efficiency of monopolistic competition in allocating resources is most accurate?
A.
Since economic profits in the long run are positive for firms in monopolistic competition, there are efficiency losses.
B.
Product differentiation under monopolistic competition offers benefits that tend to offset inefficiency from the reduction in output compared to perfect competition.
C.
Advertising expenditures under monopolistic competition represent a deadweight loss to society.
【单选题】How does monopolistic competition differ from perfect competition?
A.
There are more sellers in a market characterized by monopolistic competition.
B.
It is easier for sellers to enter a market or industry characterized by monopolistic competition.
C.
In a perfectly competitive market, products are more dissimilar.
D.
In a market characterized by monopolistic competition, individual firms have some control over price.
E.
In a perfectly competitive market, the size of the firms must be large.
【简答题】用压力法测量开口容器液位时，液位的高低取决于（），用压力法测量开口容器液位的依据是：液位高度＝压力/（），所以和容器的横截面积没有关系。
【简答题】脉经进一步确立难经提出的寸口诊脉法，把寸.关.尺三部脉象分候脏腑，即左手寸步主（），关部主肝和胆，右手寸部主（），关部主脾胃，两手尺部主（）
【简答题】垄断竞争(monopolistic competition)
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