Question

【题目】根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Testing the five-second rule

You may have seen a friend drop food on the floor, pick it up, and eat it, while declaring, “Five-second rule! ” It’s said that food dropped on the floor for five seconds or less is still likely to be clean. 【1】 .

Students at Britain’s Aston University, led by microbiology professor Anthony Hilton, tested the rule and found it to have some scientific basis. The study’s results show that food dropped for five seconds is less likely to contain bacteria than if it sits there for longer, according to Hilton.

The students also found that the type of flooring where the dropped food lands has an effect. 【2】 Bacteria are most likely to transfer from tiled (铺瓷砖的) surfaces to moist food when the food has stood there for more than five seconds.

【3】 Therefore, consumers should still be cautious. “However, the findings of this study will bring some light relief to those who have been employing the five-second rule for years, despite a general consensus that it is purely a myth,” professor Hilton said in a statement.

The research team at Aston also surveyed 500 people to find out who employs the five-second rule. Of the people surveyed, 87% said they would eat food dropped on the floor, or have done so in the past. 【4】 “Our study showed people are also more likely to follow the five-second rule, which our research has shown to be much more than an old wives’ tale,” Hilton says.

Still, say you should be careful about eating food dropped on the floor, especially if you have doubts about the cleanliness of the surface. 【5】

A. But is that true?

B. Carpeted surfaces posed the lowest risk.

C. Of those people, the majority were women.

D. We’ve just lost our last excuse to eat food off the floor.

E. Usually people recover from the infection in five to ten days.

F. There is still a risk of infection if certain bacteria are present on the dropped surface.

G. A biologist points out that one in six Americans get sick from food poisoning every year.

Answer 1

【答案】

【1】A

【2】B

【3】F

【4】C

【5】G

【解析】

试题分析：文章对食物掉在地上不超过5秒仍然是干净的五秒原则进行了测试和论证。

【1】A考查对上下文的理解和推理判断能力。上句讲五秒原则指食物掉在地上不超过5秒仍然是干净的。下文讲测试这个原则，A项对此提出异议连接前后，故选A.

【2】B考查对上下文的理解和推理判断能力。本段讲掉在地上的食物是否干净和地面有关。B项讲地毯地面比瓷砖地面风险更小一些，符合本段内容，故选B.

【3】F考查对上下文的理解和推理判断能力。下句讲因此我们仍然要小心，F项：如果掉落的地板上有某种细菌仍然有被感染的风险，与下句连接表因果，故选F.

【4】C考查对上下文的理解和推理判断能力。上句讲调查结果87%的人会吃或以前吃过掉在地上的食物。C项：当然这些人中多数是妇女，是对上句的补充说明，故选C.

【5】G考查对上下文的理解和推理判断能力。本段讲我们还是要小心，尤其是怀疑地面的干净度的时候不要吃掉在地上的食物。G项：一名生物学家指出每年有六分之一的美国人因食物中毒生病，是对前面论述的补充说明。故选G.