閱讀理解:
Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been demonstrated that rats will, when given a choice over a period of time, prefer water with vitamins to water without vitamins even though there is no difference in taste or smell between the two water bottles. When a fragrant flavor was added to the vitamin enriched fluid, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were switched to the clear water. In time, however, they broke the habit and went back to where the necessary vitamins were.
In a classic experiment, babies of 6 to 12 months old were placed in a cafeteria feeding arrangement, with a wide selection of baby food before them. They were given whatever food they pointed to or appeared interested in. At first they showed some unusual eating patterns, but over a period of time they managed to select well-balanced diet.
So, in selecting food, rats and babies do seem to know and act on what's best for them. Apparently, there is a kind of “body wisdom”, which humans soon lose. Most of us do not eat as wisely as we could. Many of our food preferences are culturally determined and influenced by long-established habits. Some people eat foxes, dogs and blackbirds, while we eat cows and pigs. So what people eat and how much they eat seem to be greatly influenced by what is going on around them.
問(wèn)題:
1. In the experiment on rats, a fragrant flavor was added to the rats' drinking water to _____.
A.encourage rats to drink vitamin enriched water
B.find out rats' preference in flavor
C.test whether rats know which drink is good for them
D.demonstrate that vitamins are tasteless
【參考答案】C
[考點(diǎn)]推理判斷題
【精析】C 根據(jù)第一段最后兩句“When a fragrant flavor was added to the vitamin enriched fluid, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were switched to the clear water. In time, however, they broke the habit and went back to where the necessary vitamins were.”可推知,在針對(duì)老鼠的實(shí)驗(yàn)中,將帶有芳香的味道加入老鼠喝的水中是為了測(cè)試?yán)鲜笫欠裰滥姆N水對(duì)它們有好處。故選C。
2.The expression “the habit” in Paragraph 1 refers to drinking water which ______.
A.has no smellB.is tastelessC.has vitaminsD.is flavored
【參考答案】D[考點(diǎn)]詞語(yǔ)理解題
【精析】D 根據(jù)上文中的“When a fragrant flavor was added to the vitamin enriched fluid, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were switched to the clear water.”可知,當(dāng)富含維生素的水中加入香味時(shí),即使將維生素轉(zhuǎn)換為清水,老鼠似乎開始喜歡并一直飲用它。再根據(jù)第一段最后一句“In time, however, they broke the habit and went back to where the necessary vitamins were.”可知,隨著時(shí)間的推移,它們打破了喝加入香味的水的這種習(xí)慣,重新飲用含有必需的維生素的水。由此可推知,the habit指的是“喝加入香味的水”。故選D。
3.According to the passage, adults' eating habits differ from those of babies because ______.
A.adults know better than babies what kind of food is good for their health
B.adults usually cannot resist the temptation of various delicious foods
C.adults' eating habits are closely related to the social and cultural customs
D.adults have more choices of food than babies in eating patterns
【參考答案】C
[考點(diǎn)]推理判斷題
【精析】C 根據(jù)最后一段倒數(shù)第三句“Many of our food preferences are culturally determined and influenced by long-established habits.”可推知,成人的飲食習(xí)慣與嬰兒不同,因?yàn)槌扇说娘嬍沉?xí)慣與社會(huì)和文化風(fēng)俗密切相關(guān)。故選C。
4. The author implies in the passage that most of us______ .
A.eat a balanced diet
B.choose the food that is of nutrition
C.have the habits influenced by the surroundings
D.like to eat the food with a fragrant flavor
【參考答案】C
[考點(diǎn)]推理判斷題
【精析】C 根據(jù)最后一段最后一句“So what people eat and how much they eat seem to be greatly influenced by what is going on around them.”可推知,我們的飲食習(xí)慣受到周圍環(huán)境的影響。其他三項(xiàng)文中均未提及。故選C。
5.As far as their eating habits are concerned, babies and rats are similar in that______.
A.both have the wisdom to choose a balanced dietB.both prefer flavored food and drinkC.both have the same eating patternsD.both develop a taste for the same kinds of flavors
【參考答案】A
[考點(diǎn)]推理判斷題
【精析】A 根據(jù)第二段最后一句“At first they showed some unusual eating patterns, but over a period of time they managed to select well-balanced diet.”以及最后一段第一、二句“So, in selecting food, rats and babies do seem to know and act on what's best for them. Apparently, there is a kind of 'body wisdom'…”可推知,嬰兒和老鼠在選擇食物方面是相似的,都有著均衡飲食的智慧。故選A。