李明和3个同事搬水泥,一共搬了2000千克,每袋50千克.每人搬了多少袋水泥?

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• 谁能帮我解释下原因1.They said my uncle _____here already.But I thought he ___this evening.A.arrived,came B.would arrive ,woule come C.had arrived,had come D.had arrived,was coming2.Who _____ away my pencil box?I ____ it on the table this morning.A.look,laid B.have taken ,laid C,has taken,have laid D.took,have laid3.Xiao Li ____a letter to you last Monday.____ it>A.writes,Do you receive B.wrote,Did you receive C.has written,Have you received D.wrote,Have you re
• “君子终日乾乾,夕惕若,厉无咎"出自哪里,