夏朝建立于约公元前2070年,这一年属于公元前 A.20世纪前期 B.20世纪后

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问题:

夏朝建立于约公元前2070年,这一年属于公元前

A.20世纪前期

B.20世纪后期

C.21世纪前期

D.21世纪后期

考点:商汤灭夏和武王伐纣(盘庚迁殷、牧野之战,国人暴动)夏朝的兴衰(禹建夏、家天下)西周的结束周的分封制
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Passage 2
My wife Nane and I are both extremely happy to be with you today. I feel truly proud to belong to this extraordinary class of 2004, and I am pleased to see that so many parents and family members were here today. The day belongs to them, too. Without their constant support, understanding and sacrifice, none of us could have achieved what we have. For me, to receive a degree from Harvard is a very great honor indeed. There are few countries in the world whose leaders in public life, business, science and the humanities have not had some association with Harvard -- and no country that has not benefited from Harvard’s outstanding contributions to human knowledge.//
You have invited me, I know, not as an individual, but as Secretary-General of the United Nations. You are saying that the United Nations matters, and that you want to hear what we have to say. Are you right in believing that the UN matters I think you are, because the UN offers the best hope of a stable world and a broadly equitable world order, based on generally accepted roles. That statement has been much questioned in the past year. But recent events have reaffirmed, and even strengthened, its validity. A role-based system is in the interest of all countries --especially today. Globalization has shrunk the world. The very openness, which is such an important feature of today’s most successful societies, makes deadly weapons relatively easy to obtain, and terrorists relatively difficult to restrain. //
Today, the p feel almost as vulnerable to the weak as the weak feel vulnerable to the p. So it is in the interest of every country to have international rules and to abide by them. And such a system can only work if, in devising and applying the rules, the legitimate interests of all countries are accommodated, and decisions are reached collectively. That is the essence of multilateralism, and the founding principle of the United Nations. All great American leaders have understood this. That is one of the things that make this country such a unique world power. America feels the need to frame its policies, and exercise its leadership, not just in the light of its own particular interests, but also with an eye to international interests, and universal principles.//
Among the finest examples of this was the plan for reconstructing Europe after World War Ⅱ, which General Marshall announced here at Harvard in 1947. That was one part of a larger-scale and truly statesmanlike effort, in which Americans joined with others to build a new international system -- a system which worked, by and large, and which survives, in its essentials, nearly 60 years later. During those 60 years, the United States and its partners developed the United Nations, built an open world economy, promoted human rights and decolonization, and supported the transformation of Europe into a democratic, cooperative community of states, such that war between them has become unthinkable.//

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许多科学家在物理学发展过程中做出了重要贡献,下列说法中正确的是(   )

A.法拉第发现了电流的磁效应,揭示了电与磁的联系

B.楞次找到了判断感应电动势方向的规律

C.布朗发现了扩散现象

D.达尔文提出了热力学温标

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2010年3月31日19时20分左右,河南伊川国民煤业有限公司井下发生煤与瓦斯突出事故,引起地面副井口爆炸。已造成40人死亡、6人失踪。本次事故为在停工停产整顿期间擅自违规生产所致。材料体现的哲学道理是()①错误的意识对事物发展具有阻碍作用②人类能够利用对规律的认识改造世界③主观能动性与客观规律是相互制约的④尊重客观规律是发挥主观能动性的基础

A.①②

B.②③

C.③④

D.①④

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()教养模式下的儿童是最成熟的,他们有能力,独立性强,善于控制自己。

A.专制型

B.放纵型

C.民主型

D.集体型

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1955年4月18日亚非会议在万隆开.周思来在大会上提出了著名“()”的原则。

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