2. 职称英语
  3. Animals do not eat more than their bodies need. They seem to have the (1)___

Animals do not eat more than their bodies need. They seem to have the (1)___

游客2023-11-11  45
问题     Animals do not eat more than their bodies need. They seem to have the (1)______ to eat when they are hungry. It has been demonstrated that rats will,(2)______given a choice over a period of time,(3)______ water with vitamins to water without vitamins(4)______there is no difference in taste or smell between the two water bottles. When a(5)______ flavor was added to the vitamin-enriched (6)______, the rats did seem to (7)______ a taste for it and kept drinking it, even after the vitamins were (8)______to the clear water.(9)______, however, they broke the habit and went back to(10)______ the necessary vitamins were.
    In a classic experiment, babies of 6 to 12 months old were(11) ______ in a cafeteria feeding arrangement,(12)______a wide selection of baby food before them. They were given whatever food they pointed to or appeared(13)______in. We are told that at first they showed some unusual eating (14)______, but that over a period of time they managed to select well-balanced(15)______.
    So, in selecting food, rats and babies do seem to know and act(16)______ what’s best for them. Apparently, humans soon(17)______a kind of " body wisdom" when growing up.(18)______of us do not eat as wisely as we could. Many of our food preferences are(19)______determined and influenced by long-established habits. Some people eat fox, dog and blackbirds,(20)______we eat cows and pigs. So what people eat and how much they eat seems to be greatly influenced by what is going on around them. [br] (8)
选项 A、exchanged
B、turned
C、switched
D、transformed
答案 C
解析 动词辨析题。[C]switched意思是“调换”，符合句意，为正确答案。[A]exchanged指的是“交换，兑换”，侧重交易；[B]turned用于be turned into sth．的结构中，表示“被转变成……”；[D]transformed“转换，改变”，与turned的意思相似，句中并不是表示维生素转变成水，因此均排除。
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