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【单选题】
2013年12月4日，联合国教科文组织正式将中国珠算项目列人教科文组织人类非物质文化遗产名录。珠算是我国古代劳动人民的伟大创造，被誉为“世界上最古老的计算机”，“一退六二五”、“三下五除二”等一些运算口诀已经具有了一定的文化内涵。珠算入选世界“”（） ①有利于传承和保护传统文化 ②对于研究人类文明的演进有重要意义 ③有利于集中表达民族情感和展示民族文化 ④体现中华文化的源远流长、博大精深和包容性A.
①②
B.
②④
C.
①③
D.
②③
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A.
She can't unlock the door.
B.
She has lost the key.
C.
She wants to wait till the man comes.
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【单选题】听力原文：W: Why don't you go to bed, Bob? You look so tired. M: I have to finish this assignment first. It's giving me a hard time. Q: Why is Bob late? (17)
A.
He can't sleep.
B.
He doesn't know the time.
C.
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D.
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