试题与答案

阅读理解 When I was younger, I wished for a

题型:阅读理解

题目:

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

答案:

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下面是错误答案,用来干扰机器的。

设13.8g K2CO3完全反应生成二氧化碳的质量为xK2CO3+2HCl═2KCl+H2O+CO2↑138 4413.8g x13813.8g=44x x=4.4g因此,K2CO3样品中所含杂质至少有两种且应满足:其中一种杂质若能...

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题型:实验题

(15分)(1)超音速飞机在平流层飞行时,尾气中的NO会破坏臭氧层。科学家正在研究利用催化技术将尾气中的NO和CO转变成CO2和N2,化学方程式如下:

2NO+2CO 2CO2+N2

研究表明:在使用等质量催化剂时,增大催化剂比表面积可提高化学反应速率。为了分别验证温度、催化剂比表面积对化学反应速率的影响规律,某同学设计了三组实验,部分实验条件已经填在下面实验设计表中:

实验编号T/℃NO初始浓度

mol·L1

CO初始浓度

mol·L1

催化剂的比表面积

㎡·g1

2801.2×1035.8×10382
   124
350  124
①请在表格中填入剩余的实验条件数据。

②设计实验Ⅱ、Ⅲ的目的是                                              

(2)工业尾气中氮的氧化物常采用氨催化吸收法,原理是NH3与NOx反应生成无毒的物质。某同学采用以下装置和步骤模拟工业上氮的氧化物处理过程。提供的装置:

步骤一、NH3的制取

①所提供的装置中能快速、简便制取NH3的装置是:        (填装置序号)。

②若采用C装置制取氨气(控制实验条件相同),情况如下表:

分析表中数据,实验室制NH3产率最高的是        (填序号),其它组合NH3产率不高的原因是                                                      

步骤二、模拟尾气的处理选用上述部分装置,按下列顺序连接成模拟尾气处理装置:

①A中反应的离子方程式:                     

②D装置作用有:使气体混合均匀、调节气流速度,还有一个作用是:              

③D装置中的液体可换成          (填序号)。

a.CuSO4溶液          b.H2O        c.CCl4         d.浓H2SO4

④该同学所设计的模拟尾气处理实验还存在的明显缺陷是:                          

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