Question

阅读下列短文, 从每小题的A、B、C、D四个选项中选出最佳选项。

Almost everyone has dropped some food on the floor and still wanted to eat it. If someone saw you drop it, he or she might have shouted, “ 5-second rule!” This so–called rule says food is OK to eat if you pick it up in five seconds or less. But is that true?

Professor Anthony Hilton from Ashton University, UK, tested the rule with his students. They found that food dropped for five seconds is less likely to contain bacteria(细菌) than if it sits there for longer.

For the study, Hilton and his students tested a lot of foods——bread, pasta, cookies and candy—to see how much bacteria they had when they made contact with the floor. They allowed the food to lie on the different types of flooring—carpet(地毯), laminate (复合地板) and tile(瓷砖) — for three seconds to 30 seconds.

Not surprisingly, the longer the food was on the floor, the more bacteria it had. And the type of floor where the dropped food landed had an effect. Bacteria are least likely to transfer(转移) from carpet, while they are most likely to transfer laminate or tiled surface after more than five seconds.

The study also found that the wetter the food, the more likely it was to pick up bacteria. Although most people are happy to follow the 5-second rule, eating food dropped on the floor still carries an infection(感染) risk. “It very much depends on which bacteria are on the floor at the time.” Hilton told Forbes.

1. What is the “5-second rule’ mean?

A. People often shout at someone when they drop food on the floor.

B. Food is safe when you pick it up off the floor in less than five seconds.

C. It’s better to eat dropped food when it’s been on the floor for over five seconds.

D. Food will go bad when dropped food on the floor in five seconds or less.

2. Where is Ashton University?

A. In the USA.      B. In England.

C. In China.        D. In France.

3. Hilton’s test wanted to find out____________.

A. if the “5-second rule” is true

B. the students’ favorite food

C. which food is easily dropped

D. if different types of floor have different bacteria

4. According to the test, we learn the following EXCEPT ________.

A. the dropped food had more bacteria if it sat on the floor for longer.

B. the dropped food on the carpet had the least bacteria.

C. bacteria was impossible to transfer from laminate or tiled surfaces.

D. the wetter food was likely to pick up bacteria.

5. According to the article, the infection risk of the dropped does NOT depend on _____________.

A. how long the food sits on the floor

B. what the dropped food is

C. what the bacteria are

D. what the weather is like that day

Answer

1.B

2.B

3.A

4.C

5.D

【解析】

试题分析：本文讲的是安东尼•希尔顿和他的学生通过实验验证五秒规则。告诉我们最好尽量不要吃。

1. 科学常识我们都知道五秒规则，就是东西掉地上，五秒之内捡起来可以吃是安全的。故选B.

2. 根据上下文意思，下文是英国教授那么‘阿什顿大学’应该在英国。故选B。

3. 根据短文意思，应该教授就是想知道五秒规则是否是真的。故选A。

4. A．the dropped food had more bacteria if it sat on the floor for longer. 如果它在地板上坐了更长的时间，食物有更多的细菌。

B．the dropped food on the carpet had the least bacteria. 地毯上的食物掉了最少的细菌。

C．bacteria was impossible to transfer from laminate or tiled surfaces．细菌是不可能从层压板或瓷砖表面传输。

D．the wetter food was likely to pick up bacteria．湿润的食物可能会加速细菌。

答案C是不对的，根据短文意思知。故除了C我们都该学习注意。

5. 根据短文意思，受感染的危险性下降不取决于 天气情况。故选D

考点：科普环保类阅读