历年英语四级考试的阅读理解部分7_大学英语阅读

历年英语四级考试的阅读理解部分7

　　A) The Atmosphere and Our Environment

　　B) Research on Radiation

　　C) Effects of Space Radiation

　　D) Importance Protection Against Radiation

　　Passage Two

　　Questions 56 to 60 are based on the following passage:

　　Taste is such a subjective matter that we dont usually conduct preference tests for food. The most you can say about anyones preference, is that its one persons opinion. But because the two big colacompaniesCoca-Cola and Pepsi Cola are marketed so aggressively, weve wondered how big a role taste preference actually plays in brand loyalty. We set up a taste test that challenged people who identified themselves as either Coca-Cola or Pepsi fans: Find your brand in a blind tasting.

　　We invited staff volunteers who had a strong liking for either Coca-Cola Classicor Pepsi, DietCoke, or Diet Pepsi. These were people who thought theyd have no trouble telling their brand from the other brand.

　　We eventually located 19 regular cola drinkers and 27 diet cola drinkers. Then we fed them four unidentified samples of cola one at a time, regular colas for the one group, diet versions for the other. We asked them to tell us whether each sample was Coke or Pepsi; then we analyzed the records statistically to compare the participants choices with what mere guess-work could have accomplished.