【題目】根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。Testing the five-second ruleYou 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 (鋪瓷磚的) 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, scientists 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.

【答案】

【1】A

【2】B

【3】F

【4】C

【5】G

【解析】試題分析：文章對食物掉在地上不超過5秒仍然是干凈的五秒原則進(jìn)行了測試和論證。

【1】A考查對上下文的理解和推理判斷能力。上句講五秒原則指食物掉在地上不超過5秒仍然是干凈的。下文講測試這個(gè)原則，A項(xiàng)對此提出異議連接前后，故選A.

【2】B考查對上下文的理解和推理判斷能力。本段講掉在地上的食物是否干凈和地面有關(guān)。B項(xiàng)講地毯地面比瓷磚地面風(fēng)險(xiǎn)更小一些，符合本段內(nèi)容，故選B.

【3】F考查對上下文的理解和推理判斷能力。下句講因此我們?nèi)匀灰⌒模?/span>F項(xiàng)：如果掉落的地板上有某種細(xì)菌仍然有被感染的風(fēng)險(xiǎn)，與下句連接表因果，故選F.

【4】C考查對上下文的理解和推理判斷能力。上句講調(diào)查結(jié)果87%的人會(huì)吃或以前吃過掉在地上的食物。C項(xiàng)：當(dāng)然這些人中多數(shù)是婦女，是對上句的補(bǔ)充說明，故選C.

【5】G考查對上下文的理解和推理判斷能力。本段講我們還是要小心，尤其是懷疑地面的干凈度的時(shí)候不要吃掉在地上的食物。G項(xiàng)：一名生物學(xué)家指出每年有六分之一的美國人因食物中毒生病，是對前面論述的補(bǔ)充說明。故選G.

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