题目

题型：不详难度：来源：

阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意问题后的词数要求）。
[1]Oops! In your rush to get to school, you drop a piece of toast on the floor. Do you throw it away or decide it’s still OK to eat? If you’re like most people, you eat it. Maybe you follow the “5-second rule”, which claims foods are safe to eat, if you pick them up within 5 seconds of dropping them. But you might want to think again. Scientists now say that 5 seconds are all it takes for foods to become contaminated with enough bacteria to make you sick.
[2]Bacteria can cause many kinds of illnesses. Some kinds of bacteria can grow on food. If we eat foods on which these bacteria are growing, we can become sick. One of these food-borne bacteria is Salmonella. It makes 1.4 million people sick every year. Earlier this year, 370 people became sick after eating peanut butter that had been contaminated with Salmonella at the manufacturing factory. Salmonella are often found in raw eggs and chicken. Cooking kills these bacteria, which is why it is so important to cook eggs, chicken, and other foods carefully.
[3]Being a good housekeeper is another good way to prevent infection. If household surfaces aren’t washed thoroughly, they can support Salmonella for weeks. A team of scientists at Clemson University in South Carolina have tested the 5-second rule, using sandwich ingredients. First, they placed a known amount of Salmonella cells on three surfaces: wood, tile, and carpet. They then placed a slice of bread and a slice of bologna(博洛尼亚大红肠) on each surface for 5, 30, or 60 seconds. After just 5 seconds, both the bread and bologna picked up enough bacteria to make you sick.
[4]So forget the 5-second rule. If your toast lands on the floor, throw it away. Stick a fresh slice of bread in the toaster. And this time, be careful not to drop it!
小题1:What is the “5-second rule” mentioned in the first paragraph? (no more than 18 words)
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小题2:Why is it important for us to cook food carefully?(no more than 5 words)
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小题3:What advice is given to prevent infection in the last paragraph? (no more than 10 words)
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小题4:Why did the scientists at Clemson University carry out that test? (no more than 15 words.)
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小题5:What is the author’s attitude towards the 5-second rule? (one word)
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答案

小题1:If you pick food up within 5seconds of dropping them, they are safe to eat.
小题2:Because cooking kills bacteria.
小题3:Don’t eat food that has dropped on the floor./ being a good housekeeper.
小题4:To find out how long it takes these bacteria to attach to food.
小题5:Negative.

解析

试题分析：“五秒理论”认为，食物掉落地上的五秒之内仍然是可以捡起来吃的。然而，这种说法得到了科学家的反对。在五秒的时间里，细菌就已经充满了掉落的食物，掉落地上的食物是不能食用的。
小题1:根据第一段“Maybe you follow the “5-second rule”, which claims foods are safe to eat, if you pick them up within 5 seconds of dropping them.”可知，食物在掉落的五秒之内被捡起时，食物还是安全的，故填If you pick food up within 5seconds of dropping them, they are safe to eat.
小题2:根据第二段“Bacteria can cause many kinds of illnesses. ...Cooking kills these bacteria,”可知，通过烧煮能够***死食物里的细菌，故填Because cooking kills bacteria.
小题3:根据最后一段“So forget the 5-second rule.”可知，第一段提到的“五秒理论”并不科学，掉到地上的食物不能再食用，故填Don’t eat food that has dropped on the floor./ being a good housekeeper.
小题4:根据第三段“After just 5 seconds, both the bread and bologna picked up enough bacteria to make you sick.”可知，食物五秒钟就充满了细菌，这个实验的目的是为了验证食物滋生细菌需要多长时间，故填To find out how long it takes these bacteria to attach to food.
小题5:根据第一段“Scientists now say that 5 seconds are all it takes for foods to become contaminated with enough bacteria to make you sick.”和第四段“So forget the 5-second rule.”可知，作者对“五秒理论”持否定的态度，故填Negative.