D.copy
B
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(证明)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(香的)flavor(作料)was added to the vitamin-enriched water, the rats did seem to prefer 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(自助) feeding arrangement, with a wide selection of baby food before them.They were given whatever food they pointed to or appeared interested in.We are told that at first they showed some unusual eating patterns, but that 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 fox, dog and blackbirds, while 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.
【【英语】2014届新课标高三上学期一轮复习测试(7)(2016.08)】相关文章:
★ 重庆市铜梁中学2013届高三下学期二轮复习定时练习(一)英语试题
★ 【北京专用】2014届高考英语一轮复习方案课时作业:选修7 Unit 4 Sharing
★ 【人教版】2014届高考英语一轮复习指导考点针对练:选修8 unit2《Cloning》
★ 【人教版】2014届高考英语一轮复习指导考点针对练:选修6 unit1《Art》
★ 2017年高考英语二轮复习精品资料:专题16 书面表达(教学案)(教师版)
★ 【北京专用】2014届高考英语一轮复习方案课时作业:选修6 Unit 3 A healthy life
★ 【英语】2014届新课标高三上学期一轮复习测试(9)(2016.08)
★ 重庆市铜梁中学2013届高三下学期二轮复习定时练习(二)英语试题
★ 【人教版】2014届高考英语一轮复习指导考点针对练:选修6 unit2《Poems》
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21