Question

6．Scientists can learn about man by studying animals，such as mice，rats and monkeys．The scientists in a laboratory are experimenting on mice and they are studying the relationship between diet and health．
In this experiment，the scientists are studying the relationship between the amount of food the mice can eat and their health．The mice are in three groups．All these groups are receiving the same healthy diet．But the amount of food that each group is receiving is different．The first group is eating one cup of food each day，the second two cups，and the third three cups．
After three years，the healthiest group is the one that is only eating one cup of food each day．The mice in this group are thinner than normal mice but they are more active．Most of the day，they are running，playing with one another，and using the equipment in their cages．Also，they are living longer．Mice usually live for two years，while most of the mice in this group are still alive after three years．
The second group of mice is of normal weight．They are healthy，too．They are active，but not as active as the thinner mice．But they are only living about two years．
The last group of mice is receiving more food than the other two groups．Most of the day，these mice are eating or sleeping．They are not active．These mice are living longer than the scientists thought-about a year and a half，but they are not healthy．They are sick more often than the other two groups．
55．The first group is the thinnest mainly becauseB．
A．they run and play all day long
B．they eat only one cup of food a day
C．they live longer than the other groups
D．they are bored with the kind of food in the cup
56．How long do normal mice live according to the passage？C
A．About one year．B．About a year and a half．
C．About two years．D．About three years．
57．What can we learn from the experiment？A
A．Daily amount of food may influence our health．
B．Sleeping may have nothing to do with weight．
C．Playing with others may help us sleep better．
D．Less exercise may make us live longer．
58．This passage is mainly about the relationship betweenC．
A．sleep and weight                B．exercise and equipment
C．food and health                 D．weight and exercise．

Answer 1

分析 本文是一篇科教類閱讀，主要介紹了一項在老鼠身上進行的"飲食與健康之間的關(guān)系"的試驗結(jié)果．

解答 55-58．BCAC
55題答案：B考查細節(jié)推理，根據(jù)文章第三段的After three years，the healthiest group is the one that is only eating one cup of food each day．The mice in this group are thinner than normal mice but they are more active．三年后最健康的一組是每天只吃一杯食物的．這一組的老鼠比正常老鼠瘦但是更加活躍．可知老鼠瘦的主要原因是"因為它們每天只吃一杯食物"，故本題答案為B選項．
56題答案：C考查細節(jié)推理，根據(jù)倒數(shù)第二段的The second group of mice is of normal weight…But they are only living about two years．（第二組老鼠的體重是正常的…但是他們只能活兩年）可知本題答案為C選項．
57題答案：A考查推理判斷，試驗對老鼠進行的是日常飲食量的控制，結(jié)果表明飲食量不僅對體重有影響而且也對壽命有影響；故本題答案為A選項"每天的食物攝入量可能會影響到我們的健康"．
58題答案：C考查細節(jié)推理，根據(jù)第一段的…they are studying the relationship between diet and health．（他們正在研究飲食與健康之間的關(guān)系）可知本題答案為C選項．

點評 本文是一篇科教類閱讀，題目涉及多道細節(jié)理解題，做題時結(jié)合原文和題目有針對 性找出相關(guān)語句進行仔細分析，結(jié)合選項選出正確答案．推理判斷也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確的答案．