2017高考权威答案？答案：C解析：盐湖面积多年稳定，说明该流域的多年平均实际蒸发量与年均降水量大致相等，约为210毫米，C正确；远大于2000毫米、约为2000毫米、远小于210毫米都不符合盐湖面积多年稳定这一条件，A、B、D错误。答案：A解析：坡面地势起伏大，坡度大，水流速度快，水分下渗少，土壤水分条件差，实际蒸发量最小，那么，2017高考权威答案？一起来了解一下吧。
不要看下面的文字，看下面的图片。
一、解答
(1)当n=13时，(n^2+n)/22>100，但当n不是整数时(n^2+n)/2可以为整数，也就是存在n∈(13,14)使得(n^2+n)/2=100。
(2)前面也知道了前N项和为2^(n+1)-2-n。但按n为非整数来算是很麻烦的，所以还是按n为正数算。假如说N=109，则n可取13，剩下的也就是有N-(n^2+n)/2=k项，这剩下的这些项的和为2^k-1。那么前N项和为2^14-2-13+2^k-1。若前N项和为2的整数幂，那么2^14-2-13+2^k-1=2^14。
(3)也许你有这样的疑惑，也就是2^(n+1)-2-n+2^k-1=2^n或等于2^(n+2)。但这是不可能的。先说2^n，假如说n=13，则要有-2-n+2^k-1=-2^n。既然剩余N-(n^2+n)/2=k这么多个，那么k就不可能等于14，要不n就可以取14了。所以k最多为13，那么2^k可是很大的，取13是不可能的了；k最小取1，但是-2^n可是很大的，也不可能。2^(n+2)也是同理。
(4)所以只能是2^(n+1)-2-n+2^k-1=2^(n+1)，然后2^k-1与-2-n互为相反数…
二、如有疑问可追问。
这是2017年全国二卷的航天部分的选择题，是对开普勒三定律的考查；
答案：CD
解析：由于海王星从P运动到Q点的时间为T0/2,而海王星在近日点时，速度大，所以从P到M的用时小于T0/4，所以A错；从Q到N的阶段，只有万有引力做正功，重力势能和动能相互转化，机械能守恒，故B错；从P到Q是从近日点到远日点，所以速度逐渐减小，故C对；从M到N的过程中由M到Q万有引力做负功，从Q到N万有引力做正功，故D对
语法填空题作为一种新型题目,重点考察的是学生的词汇掌握能力、词语辨析、单句理解能力,这就对学生英语综合能力的应用提出了更高的要求。要下面是我为大家推荐的2017高考英语语法填空分类试题，仅供大家参考!
高考英语语法填空分类试题
一、考查词形转换
1. He must be (mental) disabled.
2. His teacher took a deep drink, smiled (warm), and thanked his student very much for the sweet water.
3. We drank together and talked (merry) till far into the night.
4. One Sunday morning in August I went to a local musical festival. I left it early because I had an appointment (late) that day.
5. This proverb is saying we have to let things go in their (nature) course.
6. But Jane knew from past experience that her (choose) of ties hardly ever pleased her father.
7. Mary felt (please), because there were many empty seats in the room.
8. “That would be a very (reason) thing to do in a big city, but it could destroy a small village like ours,” Nick said.
9. “But such a small thing couldn’t (possible) destroy a village.”
参考答案：1. mentally 2.warmly 3.merrily 4.later 5.natural
6.choice7. pleased 8.reasonable 9.possibly
二、考查非谓语动词
1. He spit it out, (say) it was awful.
2. I got on the bus and found a seat near the back, and then I noticed a man (sit) at the front.
3. He suddenly appeared in class one day, (wear) sun glasses.
4. “In the beginning, there was only a very small amount of unfairness in the world, but everyone added a little, always (think) that it was only small and not very important, and look where we have ended up today.”
5. While she was getting me (settle) into a tiny but clean room, the head of the village was tying up his horse to my car to pull it to a small town some 20 kilometers away where there was a garage.
6. For example, the proverb, “plucking up a crop (help) it grow”, is based on the following story.
7. She wished that he was as easy (please) as her mother, who was always delighted with perfume.
参考答案 1-7： saying sitting wearing thinking settled to help to please
三、考查谓语动词时态及语态
1. The sun was setting when my car (break) down near a remote and poor village.
2. Besides, shopping at this time of the year was not a pleasant experience: people stepped on your feet or (push) you with their elbows (肘部), hurrying ahead to get to a bargain.
3. He walked in as if he (buy) the school.
4. Her mother was excited. “Your father has at last decided to stop smoking,” Jane____ (inform).
5. Suddenly, he (find) that he had run out of salt.
参考答案 1-5 ：broken pushed had bought was informed found
四、考查形容词或副词的比较级
1. The teacher replied, “You tasted the water. I tasted the gift. The water was simply the container for an act of kindness and love. Nothing could be (sweet).”
2. He was very tired after doing this for a whole day, but he felt very happy since the crop did “grow” (high).
3. It might have made it a little (hard) for everybody because it meant they had to turn around, but that didn’t stop the kids in the class.
参考答案 1-3 ：sweeter higher harder
高考英语语法填空答题技巧
一、已给单词提示题型的技巧
此类题可以考查学生对单词形式变化的掌握程度。
选择题
答案：B
解析：3月25日杂树隐有绿色，新叶呼之欲出，说明此时树木开始发芽，冬季树木落叶，当地自然植被属于落叶阔叶林。常绿阔叶林四季常绿；常绿硬叶林是地中海气候区植被；针叶林主要分布在亚寒带等地区，均不符合该地特征。
答案：D
解析：街道两侧用地类型可能相似，A错误；居民爱好对绿化隔离带景观差异影响较小，B错误；景观规划一般是统一规划，不会出现一侧整齐一侧杂乱的差异，C错误；行政管辖不同可能导致管理力度和方式不同，从而出现景观差异，D正确。
答案：A
解析：常绿灌木是热带、亚热带植物，对气温要求较高，气温过低会冻伤或冻死，所以制约其栽种范围的主要自然因素是气温，A正确；降水、光照、土壤对其分布有一定影响，但不是主要制约因素，B、C、D错误。
答案：A
解析：造纸、油墨和制版企业与印刷机公司生产联系紧密，在海德堡集聚，可以接近市场，节省市场营销成本，A正确；原料成本、劳动力成本、设备成本与集聚关系不大，B、C、D错误。
近几年高考地理命题趋势是什么呢?概括起来就是:凸显地理学科特色,强调对地理思维能力的考查;着重考查主干知识;试题与生产、生活实际相结合的趋势明显;对考生描述、分析、阐释、论证地理问题的能力要求越来越高等。下面是我为你整理关于2017高考地理典型例题的内容，希望大家喜欢!
2017高考地理典型例题2017高考地理典型例题答案
1.A【解析】新加坡位于马六甲海峡边缘，是沟通太平洋与印度洋的咽喉要道，地理位置优越。
2.B 【解析】从铁路线的规划来看，马来西亚东海岸衔接铁道可以连接马来半岛的东西两岸，可以从陆地上避开新加坡，减轻对新加坡的过度依赖。
3.C 【解析】两人必须同时处于夜晚才能同时观月。据图可以确定吉隆坡所在的经度为东7区。而伦敦为中时区，当北京时间11月15日3时时，吉隆坡为凌晨2时，伦敦为19时，都处于夜晚，可以同时观月。
4.C【解析】由材料得知，从公共服务巾心的m行距离角度探索城市空间增长的低碳化模式，m行距离越短，化石燃料使用量越少越环保。
5.B 【解析】双城模式意味着新组团与城市规模功能都处于同一水平，应做大做强，满足城市规模增长的需求。
6.D【解析】选项A、B、C为新城增长模式的新建组团特点，选项D为双城增长模式的新建组团特点。
以上就是2017高考权威答案的全部内容，16题：答案选D，考查解析几何，用参数方程或柯西不等式求解最大值及对应情况。14题详细解析题目类型：选择题第2题，考察数列极限的知识点。解题思路：要求$(-frac{1}{2})^n$当$n$趋向于正无穷大时的极限。先把$-1$提出来，将原式变形为$(-1)^ntimes(frac{1}{2})^n$。内容来源于互联网，信息真伪需自行辨别。如有侵权请联系删除。
