Joe________awayforthelasttwodaysbutheisduebacktomorrow.

Joe________awayforthelasttwodaysbutheisduebacktomorrow.A.is B.went C.hasbeen D.h

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SunnyMondayskieswill________ashieldofcloudsbysunset.

SunnyMondayskieswill________ashieldofcloudsbysunset.A.givepathto B.giveplaceto C

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Traditionalpublishingwillbe________dramaticallyinthenext5to1

Traditionalpublishingwillbe________dramaticallyinthenext5to10years.A.cutaway B.c

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SpeakerA:I’mgoinghomenow.Doyouneedaride?SpeakerB:________.I’

SpeakerA:I’mgoinghomenow.Doyouneedaride?SpeakerB:________.I’mnotdoneyet.A.It’sim

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造成“市场失灵”的原因有(  )。

造成“市场失灵”的原因有(  )。A.公共物品 B.外部性 C.不完全竞争 D.不完全信息 E.规模经济

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