【题目】要建造一个容积为1600立方米，深为4米的长方体无盖蓄水池，池壁的造价为每平方米200元，池底的造价为每平方米100元．
（1）把总造价y元表示为池底的一边长x米的函数；
（2）由于场地原因，蓄水池的一边长不能超过20米，问蓄水池的这个底边长为多少时总造价最低？总造价最低是多少？
名校课堂系列答案科目：高中地理 来源： 题型：
【题目】[地理一一选修3: 旅游地理] 阅读材料，回答问题。
宜春明月山主峰太平山，海拔1735.6米，明月群山，巍峨壮观，千姿百态，明月山景色，贵在天然。茫茫云海，山野天池，有"绝壁惊人，怪石争奇,苍松斗妍,山花织锦"四绝，以峰、瀑、洞、石闻名。安福羊狮幕东连明月山，西接发云界,东西走向，以花岗岩峰林地貌为主，千姿百态，巍峨壮观。以“奇峰怪石、流泉飞瀑、山花争妍、云海幻境、雾凇飞雪"为主要特色。
为保障明月山一羊狮慕研学旅行的安全与质量，老师和学生需提前做好哪些准备工作?
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【题目】 从“靠天吃饭”到“靠云吃饭”，大数据、云技术助力中国乡村振兴。2019年初，浙江乌镇谭家湾“云上农业”试验场正式启动建设。该试验场在土壤中铺设三层传感器进行实时监测，占地约700亩，分28个网格来展现不同的种植场景。建成之后，该试验场可以与世界各地的农业生产场景实现云端互联。
据此完成下列小题。
【1】谭家湾“云上农业”试验场受云技术影响最大的是
A.地形坡度B.作物种类C.土壤湿度D.种植面积
【2】“云上农业”试验场与世界各地的农业生产场景实现云端互联后，浙江最希望得到的数据为
A.日本茶树病虫害防治数据B.美国小麦带灌溉数据
C.巴西咖啡种植园施肥数据D.阿根廷肉牛吃草量数据
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【题目】 森林枯落物层由林木及林下植被凋落的植物残体累积形成，对水循环影响显著。表1为北京八达岭林场同一树龄不同密度的四块人工林地枯落物的持水能力统计。据此完成下面小题。
地块 | 甲 | 乙 | 丙 | 丁 |
植株密度（棵hm-2） | 900 | 1260 | 1460 | 1660 |
持水能力（thm-2） | 33.03 | 51.88 | 41.44 | 48.89 |
【1】一般情况下，森林枯落物的增加能够增大（ ）
A.区域降雨量B.雨水下渗量C.地表径流量D.土壤蒸发量
【2】丙地块森林枯落物持水能力比乙地块小，原因可能是丙地块（ ）
A.地形坡度陡B.降水强度小C.植树时间短D.土壤透水差
【3】从地带性植被考虑，八达岭林场营造人工林宜选择的优势树种是（ ）
A.落叶阔叶树B.落叶针叶树C.常绿阔叶树D.常绿硬叶树
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【题目】某工厂造A、B型桌子，每张桌子需木工和漆工两道工序完成.已知木工做一张A、B型桌子分别需要1小时和2小时，漆工油漆一张A、B型桌子分别需要3小时和1小时；又知木工、漆工每天工作分别不得超过8小时和9小时，而工厂造一张A、B型桌子分别获利润2千元和3千元，试问工厂每天应生产A、B型桌子各多少张，才能使获得的利润最大？最大利润是多少？
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科目：高中地理 来源： 题型：
【题目】写作(共两节，满分35分)
第一节 短文改错(共10小题；每小题l分，满分10分)
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：
1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者(从第11处起)不计分。
Have you ever gone to a music festival? During a summer holiday in Hungary, I went to attend my the first music festival. It was really an excitement to us! Since 2002 the Sziget Festival had been running every year in Budapest. It lasts for a week, which famous singers and bands from around the world perform very brilliant. In Hungarian the word ‘sziget’ mean island, which is a very appropriate name although the festival takes place on a large island in the middle of the Danube River in Budapest. Thousands people come on special “party trains” from other country such as France and Italy.
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科目：高中地理 来源： 题型：
【题目】如图所示，
是某海湾旅游区的一角，其中
，为了营造更加优美的旅游环境，旅游区管委会决定在直线海岸
和
上分别修建观光长廊
和AC，其中
是宽长廊，造价是
元/米，
是窄长廊，造价是
元/米，两段长廊的总造价为120万元，同时在线段
上靠近点
的三等分点
处建一个观光平台，并建水上直线通道
（平台大小忽略不计），水上通道的造价是
元/米．
（1）若规划在三角形
区域内开发水上游乐项目，要求
的面积最大，那么
和
的长度分别为多少米？
（2）在（1）的条件下，建直线通道
还需要多少钱？
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【题目】某学校要建造一个面积为10000平方米的运动场．如图，运动场是由一个矩形ABCD和分别以AD、BC为直径的两个半圆组成．跑道是一条宽8米的塑胶跑道，运动场除跑道外，其他地方均铺设草皮．已知塑胶跑道每平方米造价为150元，草皮每平方米造价为30元．
（1）设半圆的半径OA＝r（米），设建立塑胶跑道面积S与r的函数关系S（r）；
（2）由于条件限制r∈[30,40]，问当r取何值时，运动场造价最低？最低造价为多少？（精确到元）
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【题目】阅读理解。
阅读下列短文，从每题所给的四个选项（A、B、C和D）中选出最佳选项。
Students from Florida International University in Miami walked on water Thursday for a class assignment. To do it, they wore aquatic (水上的) shoes they designed and created.
Alex Quinones was the first to make it to the other side of a 175-foot lake on campus in record time—just over a minute. Quinones, who wore big boat-like shoes, also won last year and will receive $500.
Students had to wear the aquatic shoes and make it across the lake in order to earn an “A” on the assignment for a special course. “It’s traditional in a school of architecture to do boats out of cardboard (硬纸板) for a boat race. I thought our students were a little bit more special than that,” Canaves said. “We decided to do the walk on water event to take it to the next level.”
A total of 79 students competed in the race this year in 41 teams. Only 10 teams failed to cross the lake. Others who fell got back up and made it to the end. The race is open to all students and anyone in the neighborhood. The youngest person to ever took part was a 9-year-old girl who competed in place of her mother, while the oldest was a 67-year-old woman. A large crowd on campus joined Canaves as he cheered on the racers. He shouted encouraging words, but also laughed as some unsteadily made their way to the end.
“A part of this is for them to have more understanding of designing and make it work better,” he said. It is also a lesson in life for the students.
“Anything, including walking on water, is possible, if you do the research, test it and go through the design process seriously.
【1】What can we learn about Alex Quinones?
A. He finished the race in less than a minute.
B. He won the race with the help of 2 boats.
C. He failed the race last year.
D. He set a new record this year.
【2】For what purpose did the students join in the race?
A. To go across the lake to school.
B. To test their balance on the water.
C. To earn a good grade for a course.
D. To win the prize money of $500.
【3】What can we learn according to the fourth paragraph?
A. More than 20 teams failed to cross the lake.
B. The students who fell into the water had to quit.
C. The students kept silent when the other racers competed.
D. The youngest competitor competed instead of her mother.
【4】According to Canaves, this race can help the students ________.
A. understand designing better
B. achieve almost everything
C. work together and unite as one
D. walk on the surface of water
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