问题 选择题

关于澳大利亚和巴西的自然环境的描述,正确的是( )

A.澳大利亚东部以低矮的高原为主

B.澳大利亚地跨热带和南温带

C.巴西全部位于南半球

D.巴西气候干燥,沙漠面积广大

答案

答案:B

题目分析:巴西是拉丁美洲最大的国家,人口居世界第五,面积居世界第五,澳大利亚是全球土地面积居第六的国家,国土比整个西欧大一半,国土辽阔,且物产丰富,是南半球经济最发达的国家,澳大利亚和巴西的人口均集中在东南部沿海地区,澳大利亚东部地形是山地,南回归线穿过澳大利亚,因此澳大利亚地跨热带和南温带;赤道穿过巴西北部,所以巴西跨南、北半球,巴西以热带雨林和热带草原气候为主。

单项选择题

What is a knowledge worker Knowledge workers are people who routinely use a computer in their work to enhance their productivity. She or he is the critical component in a computer system. A computer system is made up of people, using data and procedures to work with software and hardware components. It takes all five working together to produce results. Knowledge workers are white-collar professionals from many walks of life who have the following characteristics.

They understand how to use a personal computer.

They know how to work with computer-based information.

They understand how the computer benefits their work and the business.

They regard the computer as a productivity tool.

Knowledge workers may be employed in a company of any size, large or small, at a wide range of tasks. They may be self-employed, working in their own office or at home. They may be sales representatives or managers who travel with a portable computer. Students are knowledge workers as well. Many of you may be preparing for a career in knowledge work in office automation, public relations, account supervision, social work, management, or a number of other occupations.

Today, there are over 70 million knowledge workers in the United States, who generate nearly 2 trillion pieces of paper each year. These knowledge workers work 10 hours per week more than they did 10 years ago, and create over 15 billion new pieces of paper a year. According to a survey conducted by Industry Week magazine in 1990, 39 percent of U. S. management-level knowledge workers say paperwork is a problem. Further, USA Today reported in 1991 that the average knowledge worker has 36 hours of work stacked up on the desk. Clearly, the computer as a productivity tool must play an ever more important role in knowledge work and knowledge work itself is steadily assuming larger proportions. According to several worldwide studies, urban centers in Canada, the United States, Europe, and other developed areas are increasingly using computer technology and thus evolving knowledge-based cities. These knowledge-based cities are characterized by. (1) a concentration of scientists and engineers, (2) business, university, and governmental research activities, (3) a high degree of interaction between individuals and the various institutions, and (4) a positive image that attracts college graduates to knowledge work. Clearly, the decade of the 1990s and the new millennium that follows are an exciting time for knowledge work.

What is NOT true about a knowledge worker().

A. Computer is indispensable to his/her work.

B. Computer is used to improve his/her work efficiency.

C. He/She can use computer-based information.

D. He/She depend on a computer to do all tasks.

单项选择题