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为什么要在高速公路上设置机电系统？高速公路交通工程设施系统在高速公路安全运营管理方面起到什么作用？

答案

参考答案：

伴随着高速公路的建设，高速公路交通工程设施，特别是机电系统也应运而生。它是为适应高速公路运行特点和运营管理要求而建立的，是保证高速公路交通运输正常运行和充分发挥道路通行能力的必要管理工具。一般而言，对普通公路的基本要求是"行车安全、道路通畅"，高速公路与之不同之处是加上了"高速"和"收费"，"高速、快捷、安全、畅通"是其特点，而收费道路则是我国高速公路的重要特征。要实现"高速、快捷、安全、畅通"，交通安全设施系统、通信系统和监控系统必不可少，"收费系统"是完成高速公路"收费"的必要手段。

阅读理解

根据短文内容，从下框的A-F选项中选出能概括一段主题的最佳选项。选项中有一项为多余项。

小题1:Nowadays more and more foreign enterprises and companies are no longer relying on interviews for recruitment(招募). Years of studying interviewing has made it clear that it is not a very objective process. Personnel officers often hire the person they like best or even the one they think most physically attractive. Looking good is no guarantee of doing the job well.

小题2:To get a more objective view，many companies are also using psychological tests，to hire both for relatively routine job and for positions at senior levels of management. It is impossible to say how many employers use tests，but estimates of test sales in the U．K.for 2001 were over one million.

小题3:Recruitment can involve steps in two ways. Step 1 is always the same：job application. The company decides whether you might be suitable based on your qualifications and your previous job experience. Step 2 can be screening. A specific test is given at this stage to rule out those who might not be worth interviewing. Some large employers use tests—especially IQ based tests precisely to eliminate the unsuitable. Only those who pass Step 2 go to the interview. Step 2 can also be testing and interview combined. If the company thinks you might be suitable after looking at your application，they ask you to come to be tested and to be interviewed. It is seen very much as part of the same step.

小题4:Tests claim to be scientific and objective. A large body of research has shown that interviews by themselves are not very reliable as a method of selection. People's judgments are often very subjective：whether they like the look of someone counts for more than almost anything else. But reliable and valid tests can offer rapid and more objective information about would­be employees. If a candidate talks well in an interview but his test results suggest that he is a careless person who cannot concentrate，and employer is likely to think twice about hiring him.

小题5:Taking a serious test for a job is rather different from taking a game­like test. You can spend just a little time answering questions of that kind of test，and you can deny the answers and say they are not accurate. But you can not go to a serious test without enough preparation since you can not afford to be denied and eliminated again and again. What can you do to do justice to yourself in tests？Here are three tips：Understand，Analyze，Practice.

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起钻过程中，当钻杆或钻铤接头提出转盘面时，内外钳工无须提醒司钻。（）
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