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【单选题】
2019 年 7 月 6 日,中国古城遗址在阿塞拜疆巴库举行的世界遗产大会上获准列入《世界遗产名录》。古城遗址真实展现了新石器时代长江下游稻作文明发展程度,揭示了古城遗址作为新石器早期区域城市文明的全景,符合世界遗产真实性和完整性要求。该遗址 “ ” 成功的原因( ) 1 是重要的文化旅游资源,能带来经济效益 2 蕴含丰富的民族文化魅力,展现了世界文化的多样性 3 对研究人类文明的演进具有重要意义 4 是民族情感的集中表达,有利于增强中华文化自信A.
①②
B.
①④
C.
②③
D.
③④
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【单选题】An element Y has the proton number 18.The next element in the Periodic Table is an element Z.WhiCh statement is correct?
A.
Element Z has one more electron in its outer shell than element Y.
B.
Element Z has one more electron shell than element Y.
C.
Element Z is in the same group of the Periodic Table as element Y.
D.
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