试题与答案

某种商品1~6周期的实际销售量分别为:580千克、580千克、600千克、610千克

题型:单项选择题

题目:

某种商品1~6周期的实际销售量分别为:580千克、580千克、600千克、610千克、630千克、630千克。采用算术平均数法计算,则第7周期销售量的预测值为()千克。

A.580 

B.605 

C.610 

D.630

答案:

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Passage Four

Despite a cooling of the economy, high technology companies are still crying out for skilled workers. The Information Technology Association of America projects that more than 800 000 technology jobs will go unfilled next year. The lack of qualified workers poses a huge threat to the U. S. economy.
The most commonly cited reason for this state of affairs is that the country’s agrarian-age education system, separated from the needs of the business world, fails to prepare students in the primary and secondary grades for twenty-first-century work. Yet an inadequate and outmoded education system is only part of the problem. A less tangible but equally powerful cause is an antique classification system that divides the workforce into two camps: white-collar knowledge workers and blue-collar manual laborers.
Blue-collar workers emerged in the United States during the Industrial Age as work migrated from farms to factories. White-collar office workers became a significant class in the twentieth century, outnumbering their blue-collar brethren by mid-century. But the white or blue paradigm has clearly outlived its utility. Corporations increasingly require a new layer of knowledge worker: a highly skilled multi-disciplinarian who combines the mind of the white-collar worker with the hands of the blue-collar employee. Armed with a solid grounding in mathematics and science (physics, chemistry and biology), these "gold-collar" workers--so named for their contributions to their companies and to the economy, as well as for their personal earning ability—apply that knowledge to technology. Of course, the gold-collar worker already exists in a wide range of jobs across a wide range of businesses: think of the maintenance technician who tests and repairs aircraft systems at American Airlines; the network administrator who manages systems and network operations at P&G; the advanced-manufacturing technician at Intel.
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