[2012·广元三模]一定条件下,用甲烷可以消除氮的氧化物(NOx)的污染,已知

题型:选择题

问题:

[2012·广元三模]一定条件下,用甲烷可以消除氮的氧化物(NOx)的污染,已知:

①CH4(g)+4NO2(g) =4NO(g)+CO2(g)+2H2O(g)  ΔH1=-574kJ·mol-1

②CH4(g)+4NO(g) =2N2(g)+CO2(g)+2H2O(g) ΔH2=-1160kJ·mol-1

下列选项正确的是(   )

A.CH4(g)+2NO2(g) =N2(g)+CO2(g)+2H2O(g)ΔH=-867kJ·mol-1

B.CH4(g)+4NO2(g) =4NO(g)+CO2(g)+2H2O(l)ΔH3>ΔH1

C.若用0.2mol CH4还原NO2至N2,则反应中放出的热量一定为173.4kJ

D.若用标准状况下2.24L CH4还原NO2至N2,整个过程中转移的电子为1.6mol

考点:焓变、反应热中和热燃烧热
题型:选择题

(实验班做)在一定的温度下,向CH3COONa的稀溶液里加水稀释,下列各种量的变化中,变大的是(  )

①c(H+)的物质的量浓度          ②c(OH)的物质的量浓度

③c (CH3COO)/c(CH3COOH)     ④水的浓度⑤c(H+)·c(OH)

A.①④

B.①

C.③④

D.②⑤

题型:选择题

阅读理解

     When I was younger, I wished for a Porsche and a big house. That was my idea of success. I took all the advanced classes possible and took the exams with my mind set on going to a key school. I just knew

that I would somehow become famous and be able to afford that car and the dream house. All the way

through junior year, my mind was planning this beautiful future.

     Then in the eleventh grade, many losses changed my mind. First, one of my friends died at the age of

16. Soon after, my great-grandmother passed away, and on the same day, my beloved fourth-grade

teacher. They left me not knowing what to do or where to go. Death had never touched me so closely.

      After a long period of emptiness, it finally struck me; life is not promised and neither is my future

success. While I was going through the actions in an attempt to achieve material success, I was not

enjoying my daily life. I was just existing. It occurred to me that life has more purposes than acquiring

possessions, which will only be yours until you can no longer keep up with the payments. I realized that

finding inner peace, purpose and happiness will stick with you forever and that is real success.

     Enjoying life's precious changes makes a person more successful than a wealthy person who is not

content and takes everything for granted. The summer before senior year, my attitude changed greatly.

Instead of memorizing facts, I began learning information. Instead of focusing on the future, I focused on

today and the blessings and successes that come with it.

     I still make excellent grades, but now I dedicate weeks to studying instead of preparing for exams,

and I think about the future with a deeper sense of meaning. Success, just like beauty, is in the eye of the

beholder(旁观者). For me, being successful means truly living life each day, being thankful, and affecting

the world.

1.The main idea of the first paragraph is ____________.

A. the writer drew a beautiful picture for his future

B. the writer was an intelligent student at school

C. the writer was mad for success

D. the writer devoted himself to material success

2.Which of the following statements is TRUE according to the passage?

A..People can truly enjoy daily life by trying to achieve material success.

B.Success can only be measured with a Porsche and a big house.

C.People should concentrate on today and success will follow afterwards.

D.The pursuit of inner peace, purpose and happiness is a real success.

3.  The purpose of the writer is probably to ____________.

A..advise us to have a correct attitude towards success

B.inspire us to lead an active life each day

C.remind us to set a goal for our life

D.persuade us to work hard to achieve our success

题型:选择题

某著名学者曾写到:“从1785年到1824年,经历着一个多么巨大的变化啊!在有文字记载的两千年历史中,……恐怕从来没有过这样巨大的革命。”这场革命是指[ ]

A.法国大革命

B.美国独立战争

C.拿破仑战争

D.英国工业革命

题型:选择题

营销渠道的长度,也称级数,指各级渠道中间商的数量。

题型:选择题

患者面颊潮红,烦躁不安,呼吸急促,痛苦呻吟,护士判断该面容属于

A.病危面容
B.肢端肥大症面容
C.急性病容
D.甲亢面容
E.满月面容

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