| 【免费】“先听课、后付费”点击注册 享受七天的免费学习期！ 无需立即付费，相应课程听课权限已开通，可享受已制作完成章节全部内容，满意后再付款！ |
| 【精品班】2018年职称英语考试辅导 当期考试不过，下期学费减半！ 经典班次科学搭配，全程立体化教学，学习过程全程跟踪、分析、指导。名师课程，随意选听。 |
C how salty foods were made and distributed to the subjects in the research.
D how the subjects were selected and what they were asked to do.
38 It is true that ________.
A nontasters like to share salty cheese with supertasters.
B supertasters like the taste of saltiness to block sweet tastes in food.
C nontasters consume more salt because they like intense tastes.
D supertasters like snack foods more as they contain higher levels of saltiness.
39 Supertasters prefer high-salt cheese because ________.
A it is good to health.
B it tastes less bitter.
C it is rich in nutrition.
D it has intense bitter tastes.
40 It can be inferred from the last paragraph that taste acuity is ________.
A genetically determined.
B identified with certain chemicals.
C developed over time after birth.
D related to one's eye and hair color.
第三篇 Calculating Crime
When you think about math, you probably don't think about breaking the law, solving mysteries or finding criminals. But a mathematician in Maryland does, and he has come up with mathematical tools to help police find criminals.
People who solve crimes look for patterns that might reveal （揭示） the identity of the criminal. It's long been believed, for example, that criminals will break the law closer to where they live, simply because it's easier to get around in their own neighborhood. If police see a pattern of robberies in a certain area, they may look for a suspect who lives near the crime scenes. So, the farther away from the area a crime takes place, the less likely it is that the same criminal did it.
But Mike O'Leary, a mathematician at Towson University in Maryland, says that this kind of approach may be too simple. He says that police may get better clues to the location of an offender's home base by combining these patterns with a city's layout and historical crime records.
The records of past crimes contain geographical information and can reveal easy targets - that is, the kind of stores that might be less difficult to rob. Because these stores are along roads, the locations of past crimes contain information about where major streets and intersections (十字路口) are. O'Leary is writing a new computer program that will quickly provide this kind of information for a given city. His program also includes information about the people who live in the city, and information about how a criminal's patterns change with age. (It's been shown, for example, that the younger the criminal, the closer to home the crime.)
Other computer programmers have worked on similar software, but O'Leary's uses more math. The mathematician plans to make his computer program available, free of charge, to police departments around the country.
The program is just one way to use math to fight crime. O'Leary says that criminology - the study of crime and criminals - contains a lot of good math problems. "I feel like I'm in a gold mine and I'm the only one who knows what gold looks like," he says. "It's a lot of fun."
41 Which of the following statements about math is true?
A It is too difficult for the police to use in finding criminals.
B Few people associate it with finding criminals.
C Some criminals make use of it when committing crimes.
D it has long been employed in solving crimes.
42 People tend to think there is a relationship between
A the time of a crime and the age of the criminal.
B the type of a crime and the identity of the criminal.
C the pattern of a crime and the equipment of the criminal.
D the location of a crime and the residence of the criminal.
43 O'Leary includes all the following information in writing his program EXCEPT
A the records of past crimes.
B the locations of police bureaus.
C the people living in the city.
D the change of a criminal's patterns with age.
44 O'Leary's program is different from other similar software in that
A it is inexpensive.
B it uses more math.
C it is more user-friendly.
D it is available all over the world.
45 It can be inferred from the last paragraph that O'Leary
A will develop programs for other governmental departments.
B is going to use math in looking for gold.
C thinks it's interesting to learn math.
D will further use math in studying crimes and criminals.
第5部分：补全短文（第46—50题，每题2分，共10分）
下面的短文有5处空白；短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。
Mt. Desert Island
 |  |  |  |  |  |  |
