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问题 填空题

在面向对象方法中，类之间共享属性和方法的机制称为______。

答案

参考答案：继承

解析： 在面向对象的程序设计方法中，某些属性和方法是可以共享的，由于类从父类中继承而来，这样提高了软件的可重用性。

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                                           The Basics of Math-Made Clear

     Basic Math introduces students to the basic concepts of mathematics, as well as the fundamentals of

more tricky areas. These 30 fantastic lectures are designed to provide students with an understanding of

arithmetic and to prepare them for Algebra(代数) and beyond.

     The lessons in Basic Math cover every basic aspect of arithmetic. They also look into exponents(指数), the order of operations, and square roots. In addition to learning how to perform various

mathematical operations, students discover why these operations work, how a particular mathematical

topic relates to other branches of mathematics, and how these operations can be used practically.

     Basic Math starts from the relatively easier concepts and gradually moves on to the more

troublesome ones, so as to allow for steady and sure understanding of the material by students. The

lectures offer students the chance to "make sense" of mathematical knowledge that may have seemed so

frightening. They also help students prepare for college mathematics and overcome their anxiety about

this amazing-and completely understandable-field of study.

     By the conclusion of the course, students will have improved their understanding of basic math. They

will be able to clear away the mystery(神秘性) of mathematics and face their studies with more

confidence than they ever imagined. In addition, they will strengthen their ability to accept new and

exciting mathematical challenges.

     Professor H. Siegel, honored by Kentucky Educational Television as "the best math teacher in

America," is a devoted teacher and has a gift for explaining mathematical concepts in ways that make

them seem clear and obvious. From the basic concrete ideas to the more abstract problems, he is master

in making math lectures learner-friendlier and less scary.

     With a PhD in Mathematics Education from Georgia State University, Dr. Siegel teaches mathematics

at Central Arizona College. His courses include various make-up classes and a number of lectures for

future primary school teachers.

     If the course fails to provide complete satisfaction to you, you can easily exchange it for any other

course that we offer. Or you can get your money back.

1. What does the course Basic Math mainly cover?

A. Algebra.                    

B. College Mathematics.

C. Arithmetic.                  

D. Mathematics Education.

2. What benefits can students expect from Basic Math? 

A. Stronger imaginative ability.

B. Additional presentation skills.

C. More mathematical confidence.

D. Greater chances of becoming teachers.

3. What can we learn about Professor H. Siegel?

A. He is a guest lecturer at Kentucky Educational Television.

B. He is to deliver 30 lectures in Basic Math.

C. He works in Georgia State University.

D. He specializes in training teachers.

4. Where is the passage most likely to have been taken from? 

A. A news report.              

B. A book review

C. A lesson plan.              

D. An advertisement
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单项选择题

In a perfectly free and open market economy, the type of employer -- government or private -- should have little or no impact on the earnings differentials between women and men. However, if there is discrimination against one sex, it is unlikely that the degree of discrimination by government and private employers will be the same. Differences in the degree of discrimination would result in earnings differentials associated with the type of employer. Given the nature of government and private employers, it seems most likely that discrimination by private employers would be greater. Thus, one would expect that, if women are being discriminated against, government employment would have a positive effect on women’s earnings as compared with their earnings from private employment. The results of a study by Fuchs support this assumption. Fuchs’s results suggest that the earnings of women in an industry composed entirely of government employees would be 14. 6 percent greater than the earnings of women in an industry composed exclusively of private employees, other things being equal.

In addition, both Fuchs and Sanborn have suggested that the effect of discrimination by consumers on the earnings of self-employed women may be greater than the effect of either government or private employer discrimination on the earnings of women employees. To test this hypothesis, Brown selected a large sample of White male and female workers from the 1970 Census and divided them into three categories: private employees, government employees, and self-employed. (Black workers were excluded from the sample to avoid picking up earnings differentials that were the result of racial disparities. ) Brown’s research design controlled for education, labor-force participation, mobility, motivation, and age in order to eliminate these factors as explanations of the study’s results. Brown’s results suggest that men and women are not treated the same by employers and consumers. For men, self-employment is the highest earnings category, with private employment next and government lowest. For women, this order is reversed.

One can infer from Brown’s results that consumers discriminate against self-employed women. In addition, self-employed women may have more difficulty than men in getting good employees and may encounter discrimination from suppliers and from financial institutions.

Brown’s results are clearly consistent with Fuchs’s argument that discrimination by consumers has a greater impact on the earnings of women than does discrimination by either government or private employers. Also, the fact that women do better working for government than for private employers implies that private employers are discriminating against women. The results do not prove that government does not discriminate against women. They do, however, demonstrate that if government is discriminating against women, its discrimination is not having as much effect on women’s earnings as is discrimination in the private sector.

The best title which describes the content of the text as a whole would be（）

A. The Relative Effect of Discrimination by Government Employers, Private Employers, and Consumers on Women’s Earnings

B. How Discrimination Affects Women’s Choice of Type of Employment

C. The Necessity for Eliminating Earnings Differentials in a Free Market Economy

D. The Relative Effect of Private Employer Discrimination on Men’s Earnings as Compared to Women’s Earnings
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