上世纪的IBM PC个人计算机是在（)计算机发展时期诞生的。

在例7.2中，令noPC表示一个虚拟变量：没有一台个人计算机的学生取值1，否则取值0。

(i)如果用noPC取代方程(7.6)中的PC，所估计方程的截距会怎么样？noPC的系数是多少？

(ii)如果用noPC取代PC，R2会有什么变化？

(iii)PC和noPC应该都作为自变量包括进模型中吗？请解释。

A.NC

B.PC

C.BC

D.IT

A.个人PC可以直接拿来做服务器

B.服务器更注重算力、存储、性能、散热等方面

C.个人PC的操作系统与服务器的操作系统一样

D.服务器的功耗比个人PC更低

A.Google公司掌握网络搜索的关键技术

B.微软公司掌握操作系统的开发技术

C.原IBM公司掌握大型超级计算机的制造技术

D.联想公司掌握个人计算机的制造技术

A.并购

B.合并

C.收购

D.合资

A.IBM

B.PC

C.Internet

D.Microsoft

A.只讨论系统的某种操作，而不研究该系统的一切操作

B.只讨论该系统在一定范围内的操作，而不研究该系统是如何进行这一操作的

C.只讨论该系统在一定状态下的操作，而不研究对该系统的评价

D.只讨论该系统在一定情况下的操作，不研究该系统的构造与工作原理

A.格兰仕通过低价策略牢牢把握了微波炉市场的主导权

B.TCL的网络优势为其市场优势的取得立下了汗马功劳

C.联想通过收购IBM的PC业务增大了自身的市场份额

D.微软操作系统的广泛普及增加了微软办公软件的销售

A.Google公司掌握网络搜索的关键技术

B.微软公司掌握操作系统的开发技术

C.原IBM公司掌握大型超级计算机的制造技术

D.联想公司掌握个人计算机的制造技术

听力原文： The competition among producers of personal computers is essentially a race to get the best, most innovative products to the marketplace. Marketers in this environment frequently have to make a judgment as to their competitors' role when making marketing strategy decisions. If major competitors are changing their products, then a marketer may want to follow suit to remain competitive. Apple Computer, Inc. has introduced two new, faster personal computers, the Mackintosh II and Mackintosh SE, in anticipation of the introduction of a new PC by IBM, one of Apple's major competitors.

Apple's new computers are much faster and more powerful than its earlier models. The improved Mackintosh is able to run programs that previously were impossible to run on an Apple PC, including IBM compatible(兼容的) programs. This compatibility feature illustrates computer manufacturers' new attitude of giving customers the features they want. Making Apple computers capable of running IBM software is Apple's effort at making the Mackintosh compatible with IBM computers and thus more popular in the office, where Apple hopes to increase sales. Users of the new Apple can also add accessories(附件) to make their machines specialize in specific uses, such as engineering and writing.

The new computers represent a big improvement over past models, but they also cost much more. Company officials do not think the higher price will slow down buyers who want to step up to a more powerful computer. Apple wants to stay in the high price end of the personal computer market to finance research for even faster, more sophisticated computers.

Even though Apple and IBM are major competitors, both companies realize that their competitor's computers have certain features that their own models do not. The Apple line has always been popular for its sophisticated color graphics(图形), whereas the IBM machines have always been favored in offices. In the future, there will probably be more compatibility between the two companies' products, which no doubt will require that both Apple and IBM change marketing strategies.

(33)

A．Because IBM is changing its computer models continuously.

B．Because it wants to make its machines specialize in specific uses.

C．Because it wants to stay ahead of IBM in the competitive computer market.

D．Because it expects its major competitor IBM to follow its example.

personal computers is essentially a race to get the best, most innovative products to the marketplace. Marketers in this environment frequently have to make a judgement as to their competitors’ role when making marketing strategy decisions. If major competitors are changing their products, then a marketer may want to follow suit to remain competitive. Apple Computer, Inc. has introduced two new, faster personal computers, the Mackintosh II and Mackintosh SE, in anticipation of the introduction of a new PC by IBM, one of Apple’s major competitors.

Apple’s new computers are much faster and more powerful than its earlier models. The improved Mackintosh is able to run programs that previously were impossible to run on an Apple PC, including IBM-compatible (兼容的) programs. This compatibility feature illustrates computer manufactures’ new attitude of giving customers the features they want. Making Apple computers capable of running IBM software is Apple’s effort at making the Mackintosh compatible with IBM computers and thus more popular in the office, where Apple hopes to increase sales. Users of the new Apple can also add accessories (附件) to make their machines specialize in specific uses, such as engineering and writing.

The new computers represent a big improvement over past models, but they also cost much more. Company officials do not think the higher price will slow down buyers who want to step up to a more powerful computer. Apple wants to stay in the high-price end of the personal computer market to finance research for even faster, more sophisticated computers.

Even though Apple and IBM are major competitors, both companies realize that their competitor’s computers have certain features that their own models do not. The Apple line has always been popular for its sophisticated color graphics (图形), whereas the IBM machines have always been favored in offices. In the future, there will probably be more compatibility between the two companies’ products, which no doubt will require that both Apple and IBM change marketing strategies.

第26题：According to the passage, Apple Computer, Inc, has introduced the Mackintosh II and the Mackintosh SE because ________.

A) IBM is changing its computer models continuously

B) it wants to make its machines specialize in specific uses

C) it wants to stay ahead of IBM in the competitive computer market

D) it expects its major competitor IBM to follow its example