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【单选题】
Office jobs are among the positions hardest hit by compumation. Word processors and typists will lose about 93,000 jobs over the next few years, while 57,000 secretarial jobs will vanish. Blame the PC Today, many executives type their own memos and carry their 'secretaries' in the palms of their hands. Time is also hard for stock clerks, whose ranks are expected to decrease by 68,000. And employees in manufacturing firms and wholesalers are being replaced with computerized systems. But not everyone who loses a job will end up in the unemployment line. Many will shift to growing positions within their own companies. When new technologies shook up the telecomm business, telephone operator Judy Dougherty pursued retraining. She is now a communications technician, earning about $64,000 per year. Of course, if you've been a tollbooth collector for the past 30 years, and you find yourself replaced by an E-ZPass machine, it may be of little consolation(安慰) to know that the telecomm field is booming. And that's just it: The service economy is fading welcome to the expertise economy. To succeed in the new job market, you must be able to handle complex problems. Indeed, all but one of the 50 highest-paying occupations-air-traffic controller-demand at least a bachelor's degree. For those with just a high school diploma, it's going to get tougher to find a well-paying job. Since fewer factory and clerical jobs will be available, what's left will be the jobs that compumation can't kill: Computers can't clean offices, or care for Alzheimer's patients(老年痴呆病人). But, since most people have the skills to fill those positions, the wages stay painfully low, meaning compumation could drive an even deeper wedge(楔子) between the rich and poor. The best advice now: Never stop learning, and keep up with new technology. For busy adults, of course, that can be tough. The good news is that the very technology that's reducing so many jobs is also making it easier to go back to school—without having to sit in a classroom. So-called Internet distance learning is hot, with more than three million students currently enrolled, and it's gaining credibility with employers. Are you at risk of losing your job to a computer? Check the federal Bureau of Labor Statistics' Occupational Outlook Handbook, which is available online at bls.gov. From the first paragraph we can infer that all of the following persons are easily thrown into unemployment EXCEPT
A.
secretaries.
B.
stock clerks.
C.
managers.
D.
wholesalers.
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【简答题】概念的内涵与外延之间是( )关系。
【判断题】滚动轴承精度高,转速高,磨损小,使用寿命长
A.
正确
B.
错误
【简答题】概念的内涵与外延二者之间是 关系。
【单选题】概念的内涵与外延之间是下列哪种关系
A.
正比关系
B.
反比关系
C.
对数关系
D.
函数关系
【单选题】内涵和外延的反变关系是指具有属种关系的概念之间所具有的一种相互联系、相互制约的关系。一个概念的外延越大,它的内涵越少;一个概念外延越小,它的内涵越多。反之,一个概念的内涵越多,它的外延越小;一个概念内涵越少,它的外延越大。 根据上述定义,下列哪组概念没有体现概念内涵与外延的反变关系?
A.
学生,中学生,高中生
B.
水杯,热水杯,大号热水杯
C.
笔,毛笔,圆珠笔
D.
四边形,平行四边形,正方形
【判断题】概念的内涵与外延之间的关系是:外延是从内涵所包含的对象中抽象概括而来。
A.
正确
B.
错误
【单选题】A.B两地相距13.5千米,甲、乙两人分别由A.B两地同时相向而行,往返一次,甲比乙早返回原地,途中两人第一次相遇于点C,第二次相遇于点D。已知两次相遇时间间隔为3小时20分,C.D相距3千米,则甲、乙两人的速度之比是( )。 A.5:4
B.
4:3
C.
7:5
D.
15:13
【单选题】A、B两地相距13.5千米,甲、乙两人分别由A、B两地同时相向而行,往返一次,甲比乙早返回原地,途中两人第一次相遇于点c,第二次相遇于点D。已知两次相遇时间间隔为3小时20分,C、D相距3千米,则甲、乙两人的速度之比是( )。
A.
5:4
B.
4:3
C.
7:5
D.
15:13
【单选题】A、B两地相距13.5千米,甲、乙两人分别由A、B两地同时相向而行,往返一次,甲比乙早返回原地,途中两人第一次相遇于点巴第二次相遇于点D。己知两次相遇时间间隔为3小时20分,C、D相距3千米,则甲、乙两人的速度之比是( )。
A.
5:4
B.
4:3
C.
7:5
D.
15:13
【简答题】【背景资料】 某项目安装的设备中,有一台干燥器需分段到货,现场组焊。该干燥器材质为13MnCrMoR,厚度60mm,直径4.4m,工作压力6MPa。 针对材料的缺口敏感性和易产生延迟裂纹的特性,项目部制订了专项方案,编制了作业进度计划,调配了电工、铆工、起重工、架子工等进行设备的组焊工作。 施工中,技术负责人发现环缝未严格按专项方案执行,经质检人员用低倍放大镜及探伤仪对焊缝进行表面检查和探伤检查,...
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