单项选择题 Output is now six times ________ it was before 1990.A) thatB) whatC) for whichD) of that

问答题 某企业2005年同2004年相比，各种产品的产量增长了0．8％，总生产费用增长了12％。该企业2005年的单位成本有何变化？

单项选择题 Questions 26 to 30 are based on the following passage. 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 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 continuouslyB) it wants to make its machines specialize in specific usesC) it wants to stay ahead of IBM in the competitive computer marketD) it expects its major competitor IBM to follow its example