用惰性电极在一定温度下电解某Na2SO4饱和溶液,当两极 * * 生标准状况下67.2

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问题:

用惰性电极在一定温度下电解某Na2SO4饱和溶液,当两极 * * 生标准状况下67.2L气体时,从溶液中析出64.4g Na2SO4•10H2O 晶体。则剩余溶液的溶质质量分数约是

A.64.7%

B.47.5%

C.32.2%

D.28.3%

考点:电解池原理电解池电极反应式的书写
题型:选择题

齿燥如枯骨者,属()。

A.热盛伤津

B.阳明热盛

C.肾阴枯涸

D.胃阴不足

E.肾气虚乏

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有一批正方形砖,如拼成一个长与宽之比为4:3的大长方形,则余23块;如改拼成长与宽各增加l 块的大长方形则少48块。那么,这批砖共有多少块?

题型:选择题



1.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 fight 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 rules. That statement has been much questioned in the past year. But recent events have reaffirmed, and even strengthened, its validity. A rule-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. //

题型:选择题

属于市场调查中的不道德行为()。

A.访问员伪装成学生进行调查

B.在当代商城门口数客流量但并没有告知每位顾客

C.在深度访谈的时候录像但未告知访谈对象

D.调查的时候询问受访者年龄和收入等人口统计特征问题

题型:选择题

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