【多选题】【消耗次数：1】
市场的资源配置失效主要表现在哪些方面？（ ）
①
信息不对称
②
竞争失灵
③
外部性
④
偏好不合理
参考答案：
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Can you go to the concert with us this evening?____________
①
No, I already have plans.
②
I’d love to, but I’m busy tonight.
③
No, I really don’t like being with you.
④
I’m ill, so I shouldn’t go out.
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Yes, of course.
②
Welcome!
③
No, thanks.
④
Great idea!
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I was satisfied with her explanation, ______.
①
so my classmates were
②
so were my classmates
③
so my classmates did
④
so did my classmates
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A kind teacher always takes a very _______ attitude when correcting students’ mistakes.
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negative
②
partial
③
potential
④
positive