国家标准《重大危险源辨认》的实施时间是( )。A．2002年12月31日 B．20

对于冶炼像钠、钙、镁、铝这样活泼的金属，电解法几乎是唯一可行的工业方法。下列有关说法中正确的是

A．电解熔融NaOH可生成金属钠、O₂以及H₂

B．电解熔融CaCl₂时，金属钙在阳极生成

C．可用电解饱和MgCl₂溶液的方法获得金属镁

D．电解熔融Al₂O₃制备金属铝时，要加入冰晶石，使Al₂O₃在较低温度下熔解。

阅读理解。

     Apple Inc co-founder and former CEO Steve Jobs, counted among the  greatest American CEOs of

his generation, died on Wednesday at the age of 56,  after a years-long and highly public battle with

cancer. Mourners gathered  outside his house in Palo Alto, California, and Apple stores around the world.                          

     Steve Jobs made technology fun. As tech leaders/they're really happy if they have one hit in their life.

Steve Jobs has the Apple II, the Mac, the iPod, the iPhone, the iPad and Pixar.

     Steve Jobs was a college dropout. He was adopted by a machinist and his wife, an accountant,  They

supported his early interest in electronics. He and his friend Steve Wozniak started Apple  

Computer-now just called Apple-in 1976. They stayed at the company until 1985. That year, Steve  

Wozniak returned to college and Steve Jobs left in a dispute with the chief executive.

     Mr. Jobs then formed his own company, called NeXT Computer. He rejoined Apple in 1997 after  it

bought NeXT, He helped remake Apple from a business that was in bad shape then to one of the most

valuable companies in the world today. However, Steve Jobs stepped down as Apple's chief executive

in August, 2011 because of his health. He died a day after the company released a new iPhone version

that met with limited excitement. Steve left behind a company that only he could have built, and his spirit

will forever be the foundation of Apple.

     President Obama said in a statement: by building one of the planet's most successful companies from

his garage, Steve Jobs showed the spirit of American ingenuity (独创性). By making computers personal

and putting the Internet in our pockets, he made the information revolution not only accessible. but

intuitive (直觉的) and fun.

     The fact that he was able to redesign American commerce top to bottom and across is really

astonishing. He probably will be considered an industrial giant on the scale of Thomas Edison and Henry

Ford, so one of the greatest of all time. Steve Jobs not only revolutionized technology, he also

revolutionized American business. Steve Jobs was remembered as a " great visionary and leader" and

a ^marketing genius.

1. What does the underlined word "dispute" in Paragraph 3 probably mean?  

A. Discussion.    

B. Permission.       

C. Argument.        

D. Experiment.

2. According to Paragraph 2, the author wants to show that _____.  

A. Steve Jobs made fun of modem inventions

B. Steve Jobs makes great contributions to the world

C. tech leaders will be happy when they have one hit in their life

D. Steve Jobs owns many companies in America

3. Which of the following statements about Steve Jobs is NOT TRUE?

A. Steve Jobs quitted college because of poor health.

B. Steve Jobs and his friend built a company called Apple Computer in 1976.

C. President Obama spoke highly of Steve Jobs for his achievements.

D. Steve Jobs was remembered as the founder of Apple and the Internet.

4. How long did Steve Jobs work for Apple? 

A. 9 years.          

B. 14 years.        

C. 23 years.        

D. 35 years

5. This passage is mainly about _____.   

A. the inventions of Steve Jobs            

B. a brief introduction of Steve Jobs

C. the childhood of Steve Jobs            

D. the death of Steve Jobs

开展纳税评估工作原则上在（）进行，评估的期限以纳税申报的税款所属当期为主，特殊情况可以延伸到往期或以往年度。

A.纳税申报到期之前

B.纳税申报到期之后

C.发生纳税义务之前

D.实际缴纳税款之后

按照吹弧的能源，灭弧装置可以分成三类（）；外能吹弧，灭弧装置；综合吹弧，灭弧装置。

2012年6月，上海合作组织北京峰会举行。中国、哈萨克斯坦、吉尔吉斯斯坦、俄罗斯、塔吉克斯坦、乌兹别克斯坦等国领导人出席会议。他们就深化成员国友好合作以及重大国际和地区问题深入交换意见，并对上海合作组织未来发展作出规划，达成新的重要共识。

促成上海合作组织成员国领导人对话的决定性因素是（）

A.国际政治新秩序的建立

B.世界的多极化已成定局

C.世界各国综合国力日益增强

D.各国间存在着共同利益