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【单选题】
Part Ⅱ Reading Comprehension (Skimming and Scanning) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A), B), C) and D). For questions 8-10, complete the sentences with the information given in the passage. What Will We Do for Work I believe that 90% of white-collar jobs in the U. S. will be either destroyed or altered beyond recognition in the next 10 to 15 years. That's a catastrophic prediction, given that 90% of us are engaged in white-collar work of one sort or another. Even most manufacturing jobs these days are connected to such white-collar services as finance, human resources and engineering. I talked to an old London loader some time back. He allowed that in 1970 it took 108 guys about five days to unload a timber ship. Then came containerization. The comparable task today takes eight folks one day. That is, a 98.5% reduction in man-days, from 540 total to just eight. This time the productivity aims to reconstruct—make that deconstruct—the white-collar world. In fact, I see a five-sided movement that will bring to my apparently fantastic '90% in 10 years' prediction. FIRST the Destructive Nature of the Current Flavor of Competition, Dotcom Company. Sure, most will fail. But the survivors will exert enormous pressure—fast! —on the Big Guys. When an Amazon or a Charles Schwab moves into your neighborhood, you've got moments to react. Or take king entrepreneur Jim Clark of Netscape fame. His latest venture, Healtheon/WebMD, intends to squeeze hundreds of billions of dollars of waste out of the health-care system. These new firms aim to create nothing less than havoc in the theaters in which they operate. SECOND Enterprise Software. It's a name for the tools that will hook up every aspect of a business's innards' internal organs—personnel, production, sales, accounting—and then hook up all that hooked-up stuff to the rest of the 'family' of suppliers and the suppliers' suppliers and wholesalers and retailers and end users. They are your nightmare, these 'white-collar robots.' The complex products from German software giant SAP will do to your company's internal organs exactly what robots and containerization did to the blue-collar world in 1960. Installing these tools is not easy. The technical part is distressing the politics are dreadful. When the blue-collar robots arrived, the unions revolted against it. This time it's management official who are opposing technological change. Why? These tools threaten their comfortable status, carefully crafted over several generations. But the robots did come. And they triumphed. THIRD Outsourcing. M. I. T.'s No. 1 computer professor, Michael Dertouzos, said India could easily boost its GDP by a trillion dollars in the next few years performing secret white-collar tasks for Western companies. He guessed that 50 million jobs from the white-collar West could go south to India, whose population hit 1 billion last week. The average annual salary for each of those 50 million new Indian workers: $20,000. FOURTH the Web. Ford, GM and DaimlerChrysler announce a rare combination. They will link all their tens of thousands of suppliers into a single, Internet-based network. This entity will include $250 billion annually of suppliers' products(and perhaps an additional $500 billion of those suppliers' products). In short, every penny of waste will be compressed from the huge procurement system. The order cycle will speed up dramatically. Medibuy aims for the same hat trick in medical supplies, Digital Think in training, Car Station in the auto-body-
A.
98.5%
B.
90%
C.
50%
D.
37%
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【单选题】下列化合物中不含有正常离域大 π 键的是 ( )
A.
己三烯
B.
C.
CO 2
D.
【判断题】缺少两个定位尺寸的线段(或圆弧)称为连接线段,缺少一个定位尺寸的线段(或圆弧)称为中间线段。
A.
正确
B.
错误
【单选题】下列化合物中只含有一个π键的是(  )
A.
CH≡CH
B.
H 2 O 2
C.
CH 2 =CH 2
D.
HCl
【单选题】下列化合物中不含有正常离域大 π 键的是 ( )
A.
己三烯
B.
CO 2
C.
D.
【单选题】x6132A 型万能铣床主轴上换刀时,先将转换开关 SA2 扳倒断开位置确保主轴( ),然后再上刀换刀。
A.
保持待命状态
B.
断开电源
C.
与电路可靠连接
D.
不能旋转
【简答题】下列化合物所含的σ键个数是_________个,π键有_________个,其中炔基碳杂化状态是_________
【多选题】下列化合物中含有π键的是
A.
丁烷
B.
2-戊炔
C.
2-甲基戊烷
D.
2-丁烯
E.
1,4-戊二烯
【单选题】下列叙述正确的是(  )
A.
化合物中一定含有σ键,可能含π键
B.
由非金属元素组成的化合物不一定是共价化合物
C.
非极性键只存在于双原子单质分子里
D.
不同元素组成的多原子分子里的化学键一定都是极性键
【单选题】下列有机化合物中,含有π键的是( )
A.
CH 2 =CH-CH 3
B.
CH 3 —CH 2 —OH
C.
CH 3 —NH 2
D.
CH 4
【单选题】压腹试验中脑脊液在测压管中液平不上升说明
A.
脑脊液压力升高
B.
脑脊液压力降低
C.
椎管阻塞
D.
穿刺针不在蛛网膜下腔
E.
穿刺针不在硬膜下腔
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