Module 1 Our Body and Healthy Habits單元學案

     the results of the experiment support the theory that exercise can help babies learn to talk and walk sooner than expected.      the good effects of physical exercise are not limited to children and middle-aged people. exercise continues to be important part of our lives after we grow old. for example, people over 50 years old begin to lose calcium(鈣) from their bones, which get weaker and can break easily. physical exercise, however, helps to strengthen the bones and to prevent them from losing calcium. of course, old people can take medicines to prevent themselves from suffering from losing calcium, but the medicines they take increase the change of developing some kind of cancer. so physical exercise is a much safer means of treatment.48. this passage tells that _______________.a. only middle-aged persons can benefit from physical exercise .b. physical exercise can do good to both the middle-aged and children c. people of different t  ages can all benefit from physical exercise d. physical exercise is the safest treatment for losing calcium49. active children _________ than inactive children. a. are clever and healthier                       b. are clever but not strongerc. are stronger but more foolish                 d. enjoy walking more 50. from the passage, we know that __________.  a. mice need to eat more and exercise more   b children need more exercise than other people   c. old people like to take medicine to treat their illness  d. middle aged people are easy to get fat 51. the bones of old people are easy to break because ___________.  a. there is less calcium in their bones than in those of other people   b. they are easy to become ill  c. they eat less than other people   d. they have less exercise than other people                                     e   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 proved 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(流體) , the rats did seem to develop a taste for it and kept drinking it. after the vitamins were changed to the clear water in time, however, they broke the habit and back to where the necessary vitamins were.