【题目】已知集合A={x|-3≤x＜3},B={x|2＜x≤5}，则A∪B＝（ ）
A．{x|2＜x＜3} B．{x|-3≤x≤5}
C．{x|-3＜x＜5} D．{x|-3＜x≤5}
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阳光课堂同步练习系列答案科目：高中地理 来源：内蒙古包头市2016-2017学年高二下学期期中考试地理试卷 题型：选择题
某人在夏威夷群岛中较大的岛屿——瓦胡岛上旅游，他发现甲处是郁郁葱葱的森林，而乙处是荒漠草原。下图为瓦胡岛的等高线地形图（单位：米）。据此完成下列问题。
1.图中四地风向判断正确的是
A. 
①—东南风 B. ③—西北风 C. ②—东北风 D. ④—西南风
2.甲处森林景观和乙处荒漠草原景观的分布体现了自然带的
A. 纬度地带性 B. 经度地带性 C. 垂直地带性 D. 非地带性
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科目：高中地理 来源：内蒙古2016-2017学年高一下学期第二次月考地理试卷 题型：综合题
读“水稻的主要分布区图”和“非洲某国家位置及气候资料图”完成下列问题。
（1）分析左图中A、B、C三地发展水稻种植业的有利自然条件。
（2）说明亚洲水稻生产单位面积产量高，但商品率低的原因。
（3）提出亚洲季风水田农业今后的发展方向。
（4）在“中国杂交水稻技术对外合作部长级论坛”上，地处非洲的甲国(右图)希望与中国展开合作，以缓解其粮食供应紧张问题。据非洲略图及相关气候资料图，结合水稻种植业的特点，分析甲国发展水稻种植业的的有利区位条件。
（5）多年来，我国政府投入大量资金推广杂交水稻，目前我国杂交水稻栽培面积占全国水稻种植面积的50%，这一现象主要体现的农业区位因素是什么。
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科目：高中地理 来源： 题型：
【题目】已知集合M＝{x|x＜2且x∈N}，N＝{x|－2＜x＜2且x∈Z}．
（1）写出集合M的子集、真子集；（2）求集合N的子集数、非空真子集数．
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科目：高中地理 来源： 题型：
【题目】
They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.
A. had been working; are still working
B. had worked; were still working
C. have worked; were still working
D. have worked; are still working
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科目：高中地理 来源： 题型：
【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. | |
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科目：高中地理 来源： 题型：
【题目】利用独立性检验来考虑两个分类变量X和Y是否有关系时，通过查阅临界值表来确定推断“X与Y有关系”的可信度，如果k＞5.024，那么就推断“X和Y有关系”，这种推断犯错误的概率不超过（ ）
A．0.25 B．0.75
C．0.025 D．0.975
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