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【单选题】
SS4型电力机车段修技术规程要求，TKSl4A型司机控制器手轮与主轴的配合间隙应不大于()。A.
0.1mm
B.
0.2mm
C.
0.3mm
D.
0.4mm
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举一反三
【单选题】For a linear regression model 【图片】, which assumption is required for the uniqueness of the OLS estimator?
A.
strict exogeneity
B.
is nonsingular
C.
conditional homoskedasticity:
D.
conditional non-autocorrelation
【单选题】Which assumption is NOT the basis of the ‘production concept’ in business activities?
A.
Product with a wide variety is more favorable among consumers
B.
Consumers are unresponsive to product quality
C.
Consumers like cheap products
D.
Producers do not understand consumers’ needs very well
【简答题】广告不仅对( )有利,而且对( )也有好处,因为它可以使( )从中获取有用的信息。
【简答题】如陪客人同乘一辆轿车，应注意哪些礼仪？
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