唐朝前期在政治制度上进一步完善了专制主义中央集权制度，其完善的含义是（）A.使皇权进

发布时间：2017-05-02 01:12 │ 来源：www.tikuol.com

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问题：

唐朝前期在政治制度上进一步完善了专制主义中央集权制度，其完善的含义是（）

A.使皇权进一步强化

B.相权得到削弱

C.使地方权力进一步分散

D.使中央职权部门相互牵制和监督

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I knew I could sing but I had to prove it. I don’t care what life gives me; I’ll     it. It was my ninth time     in front of a music executive to try to get a record deal. The first eight interviews had     cold refusals.
When I found out the     was at 6 a.m., I went a little crazy, for I had to get up very early in order to get to the audition (试唱) room on time. This     audition was at the office of Sony Music’s president, John Grady.      to sing songs for a man behind a desk, I was     . It’s very hard to let someone     whether you’re worthy of a commercial career in 10 minutes. But, in this business, it was something I had to do.
I grew up in a rural area.     farming, there wasn’t much of a local economy. If one wanted new horizons, he had to learn a(n)     that could take him out of there. That’s how I     my singing. I took up singing at an early age. When I was 15, I made money from singing. That was a huge     for me.
It was in the middle of my singing that John Grady didn’t appear     at all. About halfway through, I saw him write something down. From where I stood, I could     see him write the letter 'n’,      by the letter 'o’. I guessed he didn’t     me.
As we said good-bye, Grady gave me a     . Though my hands were     , I found the     to read the note. It didn’t say, "No." It said, "Now." Just then, I knew that my     of becoming a professional musician was starting to come true.

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简述边际效用递减规律。

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小儿肺炎喘嗽的变证病位常见于（）

A.心

B.肺

C.脾

D.肝

E.肾

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黄铁矿主要成分是FeS₂。某硫酸厂在进行黄铁矿成分测定时，取0.1000 g样品在空气中充分燃烧，将生成的SO₂气体与足量Fe₂(SO₄)₃溶液完全反应后，用浓度为0.02000 mol·L^-1的K₂Cr₂O₇标准溶液滴定至终点，消耗K₂Cr₂O₇溶液25.00 mL。

已知：

SO₂＋2Fe³⁺＋2H₂O = SO₄^2-＋2Fe²⁺＋4H⁺

Cr₂O₇^2-＋6Fe²⁺＋14H⁺ = 2Cr³⁺＋6Fe³⁺＋7H₂O

(1)样品中FeS₂的质量分数是(假设杂质不参加反应)________________。

(2)若燃烧6g FeS₂产生的SO₂全部转化为SO₃气体时放出9.83 kJ热量，产生的SO₃与水全部化合生成

H₂SO₄，放出13.03 kJ热量，写出SO₃气体转化为H₂SO₄的热化学方程式__________________________。

(3)煅烧10 t上述黄铁矿，理论上产生SO₂的体积(标准状况)为_________L，制得98%的硫酸质量为____t，SO₂全部转化为H₂SO₄时放出的热量是___________kJ。

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中美建交三原则

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