问题 阅读理解

阅读理解

     A different sort of generation gap is developing in the workplace. Someone - specifically the father-

daughter team of Larry and Meagan Johnson - has figured out that on some American job sites, five

generations are working side by side.    

     In their new book about generations in the workplace the pair argue that while such an age difference

adds a lot of texture and a variety of life experiences, it can also bring tensions and conflicts.    

     The Johnsons are human-resource trainers and pubic speakers. Dad Larry is a former health-care

executive; daughter Meagan is a onetime high-level sales manager.    

     Here are the oldest and youngest of the five generations they identify:    

     They call the oldest group Traditionals, born before 1945. They were heavily influenced by the

lessons of the Great Depression and World War. They respect authority, set a high standard of

workmanship, and communicate easily and confidently. But they’re also stubbornly independent. They

want their opinions heard.    

     At the other extreme are what the Johnsons call Linksters, born after 1995 into today's more

complicated, multimedia world. They live and breathe technology and are often social activists.    

     You won't find many l5-year olds in the offices of large companies, except as volunteers, of course,

but quite old and quite young workers do come together in sales environments like bike shops and ice

cream stores.    

     The Johnsons, Larry and Meagan, represent a generation gap themselves in their work with jobsite

issues. The Johnsons' point is that as the average lifespan continues to rise and retirement dates get

delayed because of the tight economy, people of different generations are working side by side, more

often bringing with them very different ideas about company loyalty and work values.    

     The five generations are heavily influenced by quite different events, social trends, and the cultural

phenomena of their times. Their experiences shape their behavior and make it difficult, sometimes, for

managers to achieve a strong and efficient workplace.    

     Larry and Meagan Johnson discuss all this in greater detail in a new book, "Generations, Inc. : From

Boomers to Linksters - Managing the Friction Between Generations at Work, "published by Amacom

Press, which is available in all good bookstores from this Friday.    

1. The type of generation gap in Paragraph 1 refers to the difference in beliefs ____.   

A. between managers and workers    

B. among family members    

C. among employees

D. between older and newer companies     

2. Which of the following statements is NOT true about Traditionals?    

A. They've learned much from war and economic disaster.    

B. They're difficult to work with as they are stubborn.    

C. They respect their boss and hope to be respected.    

D. They're independent workers with great confidence.  

3. According to the passage, the Linksters are usually ____.    

A. found working in the offices of large companies    

B. influenced by multimedia and technology    

C. enthusiastic multimedia activists    

D. ice cream sellers

4. According to the passage, modern workforces are more diverse because ____.   

A. people want to increase their average lifespan    

B. many young people are entering the workforce    

C. employees with different values can benefit their companies    

D. retirement dates are being delayed for economic reasons    

5. What's the main purpose of the passage?    

A. To promote a new book by Larry and Meagan Johnson.    

B. To describe the five different workplace generations.    

C. To introduce the Johnsons' research about diverse workforces.    

D. To identify a major problem in modern workforces.

答案

1-5: CBBDA

单项选择题
填空题

(15分)工业中利用废铜(含有锌、铝等)制取硫酸铜,将适量硝酸分多次加入到铜粉与稀硫酸的混合物中加热,使之反应完全,通过蒸发、结晶得到硫酸铜晶体。

下表列出了几种离子生成氢氧化物沉淀的pH(开始沉淀的pH按金属离子浓度为1.0 mol·L—1计算)。

 开始沉淀的pH沉淀完全的pH沉淀溶解的pH
Cu2+4.46.4 
Al3+3.05.010
Zn2+5.98.911
(1)①为了节约原料,硫酸和硝酸的物质的量之比最佳为    ;该反应中产生尾气污染空气,请选择下图中合适的装置吸收尾气   。 

②由表可知Zn(OH)2能溶于NaOH溶液生成[Zn(OH)4]2—,请写出金属锌与氢氧化钠溶液反应的离子方程式    

(2)为了符合绿色化学的要求,某研究性学习小组进行如下设计:

第一组:空气为氧化剂法

将空气或氧气直接通入到铜粉与稀硫酸的混合物中,发现在常温下几乎不反应。向反应液中加少量FeSO4,即发生反应,生成硫酸铜。反应完全后,加入物质甲调节pH,铁元素全部沉淀(一般认为铁离子的浓度下降到10-5 mol·L-1,就认为沉淀完全。已知:Ksp[Fe((OH)3]≈10-38,然后过滤、浓缩、结晶。

请回答下列问题:

①方案为了使铁离子全部沉淀,应调节pH至少为    

②方案中甲物质可选用的是     

A.CaO    B.NaOH     C.CuCO3      D.Cu2(OH) 2CO3    E.Fe2(SO4) 3

③方案中加入少量FeSO4可加速铜的氧化,用离子方程式解释其原因    

第二组:过氧化氢为氧化剂法

将铜粉放到 1.5 mol·L-1的足量稀硫酸中,控温在50℃加入10%的足量H2O2反应0.5 h,升温到60℃,持续反应1 h后,过滤、蒸发浓缩、减压抽滤等,用少量95%的酒精淋洗后晾干,得CuSO4·5H2O 。

请回答下列问题:

④用过氧化氢为氧化剂法比流程中采用硝酸和硫酸溶解的优点是   

⑤用少量95%的酒精淋洗的目的是    

(3)废铜溶解后经过一系列操作得到硫酸铜溶液,补充完整由溶解液制备纯净硫酸铜溶液的实验步骤