题目内容
阅读图文材料，完成下列要求。
美国脐橙是一种营养丰富的水果，现被世界许多国家引进栽培，大多栽种在丘陵地区山谷中。脐橙栽培要求年平均气温为17℃ -20℃，积温为5800℃ -6500℃，1月平均气温在6℃以上，年降水量1000毫米以上。赣南为我国最大的脐橙产区，目前拥有亚洲最大的脐橙深加工企业，产品远销国内外。图8为赣南地区区域分布图。
（1）分析赣南地区适宜大面积种植脐橙的有利气候条件。
（2）赣南地区的脐橙多种植在山谷北坡的山腰上，试分析山谷北坡山腰地带利于种植的原因。
（3）简述赣南地区建成亚洲最大脐橙深加工企业的有利区位条件。
习题精选系列答案
①—东南风 B. ③—西北风 C. ②—东北风 D. ④—西南风
【题目】More and more scientific experiments prove that physical exercise can reduce the dangers of some illnesses in middle-aged persons．Exercise strengthens the heart muscle，reduces blood pressure and help to prevent muscles from changing into fat．Physical exercise is just as important for children．
Exercise and food affect growing speed in young lab animals．Baby mice start running as soon as they are big enough to use an exercise wheel in their cage．If they get extra food and run a lot，they will grow as much as 1.5 times bigger than normal．
The same differences in growing speed might be found between active and inactive children．Physical exercise helps active children grow faster than inactive children．One experiment shows that the brains of the mice that had enough exercise weighed about 3％more than those of the mice that did not exercise The mice that exercised are much quicker to learn doing new exercise than the mice that did not exercise．
The results of the experiments suppose 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 an important part of our lives after we grow old．For example，people over 50 years old begin to lose calcium(钙) 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 chance of developing some kind of cancer(癌)．So physical exercise is a much safer treatment(治疗)．
根据短文内容完成下列表格，一空一词。
Title | Physical exercise | |
Theme | Physical exercise does 【1】 to people’s health ,both young and old. | |
【2】 of experiments | ·Baby mice will be as much as 1.5 times bigger than normal on 【3】 that they eat extra food and run a lot. ·The brains of the mice that had enough exercise were 【4】 than those of the mice that didn’t exercise. | |
【5】 | Children | ·Helping active children grow faster than inactive children. ·Being【6】 For babies to learn to talk and walk sooner. |
The middle-aged | ·【7】 the heart muscle. ·Reducing blood pressure . ·Preventing muscles from changing into fat. | |
Old people | ·Helping the old people’s bones get 【8】 by preventing them from losing calcium. ·【9】 the chance of developing some kind of cancer 【10】 by medicine. | |