[Problem Solving]
试题详情
题目:
For any integer k greater than 1, the symbol k* denotes the product of all the fractions of 
选项:
A、5
B、

C、

D、

E、

答案:
E




Which of the following most logically completes the argument?
A photograph of the night sky was taken with the camera shutter open for an extended period. The normal motion of stars across the sky caused the images of the stars in the photograph to appear as streaks. However, one bright spot was not streaked. Even if the spot were caused, as astronomers believe, by a celestial object, that object could still have been moving across the sky during the time the shutter was open, since __________.

A six-sided mosaic contains 24 triangular pieces of tile of the same size and shape, as shown in the figure above. If the sections of tile fit together perfectly, how many square centimeters of tile are in the mosaic?
| Line | Much research has been devoted to investigating |
| what motivates consumers to try new products. | |
| Previous consumer research suggests that both the | |
| price of a new product and the way it is advertised | |
| (5) | affect consumers perceptions of the products |
| performance risk (the possibility that the product will | |
| not function as consumers expect and/or will not | |
| provide the desired benefits). Some of this research | |
| has concluded that a relatively high price will reduce | |
| (10) | a consumers perception of the performance risk |
| associated with purchasing a particular product, | |
| while other studies have reported that price has little | |
| or no effect on perceived performance risk. These | |
| conflicting findings may simply be due to the nature | |
| (15) | of product advertisements: a recent study indicates |
| that the presentation of an advertised message has a | |
| marked effect on the relationship between price and | |
| perceived performance risk. | |
| Researchers have identified consumers perception | |
| (20) | of the credibility of the source of an advertised |
| message—i.e., the manufacturer—as another factor | |
| affecting perceived performance risk: one study | |
| found that the greater the source credibility, the lower | |
| the consumers perception of the risk of purchasing | |
| (25) | an advertised new product. However, past research |
| suggests that the relationship between source | |
| credibility and perceived performance risk may be | |
| more complex: source credibility may interact with | |
| price in a subtle way to affect consumers judgments | |
| (30) | of the performance risk associated with an advertised |
| product. |
