2020年安徽省淮南市高考数学二模试卷（一） 一、选择题（本大题共12小题，共60.0分） 1.若集合A={x|-1＜x≤3}，B={x|lg x＞0}，则A∩B等于（） A. （-1，1） B. （1，3） C. （0，3] D. （1，3] 2.设i是虚数单位，若复数z满足z?i=4-9i，则其共轭复数=（） A. -9-4i B. -9+4i C. 9-4i D. 9+4i 3.设，，n=log a（1-a），，则m，n，p的大小关 系是（） A. n＞m＞p B. m＞p＞n C. p＞n＞m D. n＞p＞m 4.函数f（x）=sin x+（x∈R）的最小值是（） A. B. C. D. 5.设λ∈R，则“λ＝－3”是“直线2λx＋(λ－1)y＝1与直线6x＋(1－λ)y＝4平行”的( ) A. 充分不必要条件 B. 必要不充分条件 C. 充要条件 D. 既不充分又不必要条件 6.在如图的程序框图中，若n=2019，则输出y=（） A. 0 B. C. D. 7.在△ABC中，三内角A、B、C对应的边分别为a、b、c，且a cos B+b cos A=2cos C， c=1，则角C=（） A. B. C. D. 8.已知双曲线=1（a＞0，b＞0）的渐近线与圆（x+a）2+y2=a2相切，则双曲线 的离心率等于（） A. B. C. 2 D.
9.已知函数y=A sin（ωx+φ）（|φ|＜，ω＞0）图象的一部分 如图所示．若A，B，D是此函数的图象与x轴三个相邻的 交点，C是图象上A、B之间的最高点，点D的坐标是（， 0），则数量积=（） A. B. C. D. 10.如图，一个空间几何体的正视图、侧视图都是边长为2，且一个内角为60°的菱形， 俯视图是正方形，那么这个几何体的表面积为（） A. 16 B. 8 C. 4 D. 8 11.设直线分别是函数图象上点处的切线，与垂 直相交于点P，且分别与y轴相交于点A, B，则A, B两点之间的距离是 A. 1 B. 2 C. 3 D. 4 12.若函数f（x）=x-sin2x+a cos x在（-∞，+∞）内单调递增，则实数a的取值范围是（） A. [-2，2] B. [-2，] C. [-] D. [-2，-] 二、填空题（本大题共4小题，共20.0分） 13.已知向量=（m，1），=（3，3）．若（），则实数m=______． 14.2019年3月18日晚，某校高一年级举行“校园歌手卡拉OK 大奖赛”，邀请了七位评委为所有选手评分．某位选手演出 结束后，评委们给他评分的茎叶图如图所示，按照比赛规则， 需去掉一个最高分和一个最低分，则该选手最终所得分数的 平均分为______． 15.在四面体ABCD中，AB=CD=，BC=DA=，CA=BD=，则此四面体ABCD 外接球的表面积是______． 16.关于圆周率π的近似值，数学发展史上出现过很多有创意的求法，其中可以通过随 机数实验来估计π的近似值．为此，李老师组织100名同学进行数学实验教学，要求每位同学随机写下一个实数对（x，y），其中0＜x＜1，0＜y＜1，经统计数字x、
2019年广州二模英语试题 A The country is India. A large dinner party is being given in an up-country station by a colonial official and his wife. The guests are army and government officers and their wives, and an American naturalist. At one side of the long table, a spirited discussion springs up between a young girl and an army officer. The girl insists women have long outgrown the jumping- on- a- chair -at-the-sight-of-a-mouse era, and that they are not as anxious as their grandmothers were. The officer says they are, arguing women haven't the actual nerve control of men. “A woman's reaction in any crisis, "the officer says, “is to scream. And while a man may feel like it, he has that ounce more of control than a woman has." The American scientist does not join in the argument but sits and watches the faces of the other guests. As he stares, he sees a slight, though strange look of anxiety come over the face of the hostess. With a small gesture she summons the servant standing behind her chair. She whispers to him. The servant's eyes widen. He turns quickly and leaves the room. No one else sees this, nor the servant when he puts a bowl of milk on the balcony outside the glass doors. The American understands. In India, milk in a bowl means only one thing. It is bait for a snake. He realizes there is a cobra in the room. The American's eyes move across the room but he sees nothing. He realizes the snake can only be in one place-under the table. His first reaction is to jump back and warn the others. But he knows any sudden movement will frighten the cobra and it will strike. He speaks quickly, the quality of his voice so arresting that it quietens everyone." I want to know just what control everyone at this table has. I will count three hundred-that's five minutes-and not one of you is to move a single muscle. Now! Ready!"
2018届佛山二模测试地理试题及答案
佛山二模地理试题（高清） ー、选择题:本卷共35个小题,每小题4分,共140分。在每小题给出的四个选项中,只有项是符合题目要求的。 基瓦利纳是美国阿拉斯加州的一座小镇,它位于一条狭长的沙坝上,海拔约约1.8-3米。历史上,在一年中的大多数日子,基瓦利纳几乎被厚厚海冰包围,每到秋冬季多暴风雪发生。近50年来,由于全球变暖效应,海水侵蚀使基瓦利小镇岛屿面积急剧减少,预计到2025年,该小镇将会彻底沉入海底。读图回答1-3题。 1.形成狭长沙坝的地质作用是 A.冰川侵蚀 B.海浪堆积 C.珊瑚堆积 D.火山喷发 2.当基瓦利纳小镇处于一年中冰雪融化最多的时候,该区域 A.出现极夜现象 B.暴风雪频发 C.河流从东面冲刷岛岸 D.受温暖西风影响 3.近50年来,基瓦利纳小镇岛屿面积急剧减少最主要原因是 A.暴风频率增加,风浪侵蚀海岸加剧 C.植被遭破坏,抵抗侵蚀的能力下降 B.海平面上升,岛屿沿岸低地被淹没 D.海冰消融,失去海冰对岛岸的保护
总部位于“硅谷”的美国苹果公司是世界著名电子企业,于2010年10月在郑州新郑综合保税区设立生产基地。2016年苹果公司公布的全球766家零部件生产企业中,中国大陆346家、台湾41家、日本126家、美国69家。数据显示,该生产基地生产的智能电子产品约占革采公司全球总产量的一半,产品主要销往美国、英国、中国等地。据此完成4-6题。 4.郑州新郑综合保税区成为苹果公司全球最大生产基地的主要区位条件是 A.铁路交通方便 B.市场潜力大 C.研发力量强 D.生产成本低 5.与美国本土零部件供应企业相比,中国大陆零部件供应企业的优势条件是 A.接近原料地 B.接近市场 C.接近研发中心 D.接近国际航空港 6.苹果公司的产品想要回归“美国制造”,其难度主要在于美国 A.产业链不完备 B.原材米料成本高 C.市场空间狭小 D.研发能力下降 江苏省处于东部沿海地区,随着经济的快速增长,苏南、苏中、苏北地区间出现了区域发展不平均衡现象。“十三五”期间,江苏省制定了全面提升交通路网的战略规划。下图是江苏省主要铁路规划图,完成7-8题。
2016年安徽省淮南市高考数学二模试卷（理科） 一、选择题：本大题共12小题，每小题5分，共60分。在每小题给出的四个选项中，只有一项是符合题目要求的。 1．已知全集U=R，集合A={y|y=+2}，B={x|x2﹣7x+12≤0}，则A∩（?U B）（） A．[2，3）B．（2，4）C．（3，4]D．（2，4] 2．复数z=3+，则|z|等于（） A．3 B． C． D．4 3．设z=4x?2y中变量x，y满足条件，则z的最小值为（） A．2 B．4 C．8 D．16 4．已知数列{a n}的前项和为S n，点（n，S n）在函数f（x）=（2t+1）dt的图象上，则 数列{a n}的通项公式为（） A．a n=2n B．a n=n2+n+2 C．a n=D．a n= 5．过点（2，0）引直线l与圆x2+y2=2相交于A，B两点，O为坐标原点，当△AOB面积取最大值时，直线l的斜率为（） A．B．±C．±D． 6．将4本完全相同的小说，1本诗集全部分给4名同学，每名同学至少1本书，则不同分法有（） A．24种B．28种C．32种D．16种 7．下列四个结论： ①命题“若f（x）是周期函数，则f（x）是三角函数”的否命题是“若f（x）是周期函数，则f（x）不是三角函数”； ②命题“?x0∈R，x02﹣x0﹣1＜0”的否定是“?x∈R，x2﹣x﹣1≥0”； ③在△ABC中，“sinA＞sinB”是“A＞B”的充要条件； ④当a＜0时，幂函数y=x a在区间（0，+∞）上单调递减． 其中正确命题的个数是（） A．1个B．2个C．3个D．4个 8．阅读如图所示的程序框图，若输入m=2016，则输出S等于（）
2016年广州市普通高中毕业班综合测试（二） 英语 第I卷 第二部分阅读理解（共两节，满分40分） 第一节（共15小题；每小题2分，满分30分） 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，并在答题卡上将该项涂黑。 A The best of adventure and sport in NSW If you want adventure, then the state of New South Wales (NSW) in Australia is the place to go. No matter what the season, you can choose from a wide variety of landscapes, climates, activities and experiences all with easy access to tour operators and local guides. For snow lovers, there’s no better place than the Snowy Mountains. Skiers and snowboarders can hit the slopes for some downhill thrills in Kosciuszko National. Park. Non-skiing adventure-seekers will enjoy hiking or snowshoeing. If water sports are more your thing, there are plenty of places to go. Surfers you’re your surfboards and head to Byron Bay, Shellharbour, or Newcastle's Merewether Beach. To see spectacular sea life up close, visit Lord Howe Island, a world-famous destination for underwater diving. The oceans, lakes and rivers around NSW offer a lifetime’s worth of exciting fishing and boating challenges. Want more Experience the rush of whitewater rafting in Jindabyne and Penrith, or go barefoot waterskiing in Port Stephens. For adventure in NSW, the sky’s the limit! Book a hot-air-balloon or helicopter ride over the stunning vineyards of the Hunter Valley, go skydiving in Wollongong, or try hang-gliding in Stanwell Park. Get to know the State’s unique and tough landscapes on a caving, canoeing or rock climbing adventure. Four-wheel-driving and off-roading tours are popular in both Country NSW and Outback NSW. Or explore parts of the State on horseback ―you’Il find great horse riding options in Sydney and throughout NSW. 21. What is the purpose of this article A. To advertise a new holiday tour. B. To describe the geography of NSW. C. To promote NSW's tourist attractions. D. To encourage people to move to NSW.
2016～2017年佛山市普通高中高三教学质量检测（二） 文科综合能力测试地理试题 2017.4 第Ⅰ卷 选择题（共44分） 一、选择题:本卷共11个小题，每小题4分，共44分。在每小题给出的四个选项中，只有 一项是符合题目要求的。 国家卫计委发布《中国流动人口发展报告2016》指出：以东北目前的生育水平和人口 流出趋势看，东北地区人口正面临危机。据统计，从2006年到2015年，东北地区人口年均 增长率仅为0.21%，不足全国同期水平的一半，人口增长基本趋于停滞。据此回答1-3题。 1.东北地区人口外流的首要方向是 A.北京 B.上海 C.内蒙古 D.海南 2.目前，导致东北人口增长基本趋于停滞的直接原因是 A.自然资源日益匮乏 B.人口净流出多 C.人口老龄化严重 D.经济发展缓慢 D.全面鼓励生育 3.为解决东北地区的人口危机，应采取的根本措施是 A.提高城市化水平 B.改善居住环境 C.优化产业结构 蕉麻在菲律宾广泛种植，棉兰老岛是其产地之一。蕉麻生长要求高温、高湿，排水良好， 宜静风或微风环境。达沃是全国蕉麻加工中心，粗加工后的蕉麻纤维大量出口到欧洲。读图 完成4-6题。 蕉麻 4.棉兰老岛蕉麻种植业的特点是 A.机械化程度低 C.水利工程量大 B.生产方式粗放 D.市场适应性强 5.与①地相比，②地蕉麻在5-10月生长期的优势条件是 A.降水较多 B.气温较高 C.风力较小 D.土层深厚 6.达沃成为菲律宾全国性的蕉麻加工中心，主要得益于 A.种植历史悠久 C.劳动力资源丰富 B.港口运输方便 D.靠近原料产地
河流左、右两岸的侵蚀和淤积面积的变化可以反映出河道宽度的变化。下图为 1988-2014年黄河上游河套平原某河段左、右岸侧向侵蚀与淤积面积的变化图（正数为侵蚀，负数为淤积）。据此完成7-9题。 7.该河段河道变宽幅度最大的时段是 A.1989—1991年 B.1995—2000年 C.2007—2009年 D.2011—2013年 8.该河段河道宽窄的变化，说明了 A.地转偏向力起主导作用 B.该河段河流落差大 C.右岸常年淤积，左岸常年侵蚀 D.该河段河流含沙量与流量变化大 9.2001年前后，河道宽度变化的幅度有显著改变的主要原因是 A.上游流域降水年变率小C.上游流域植被遭受破坏 B.全球气候逐渐变暖D.上游水库投入运行
2014年广东省深圳市高考理科数学二模试题及答案解析 数学（理科） 一、选择题 1.函数)1ln(+=x y 的定义域是 A. )0,1(- B. ),0(+∞ C. ),1(+∞- D. R 2.方程014=-z 在复数范围内的根共有 A.1个 B. 2个 C. 3个 D. 4个 3.两条异面直线在同一个平面上的正投影不． 可能是 A.两条相交直线 B.两条平行直线 C.两个点 D.一条直线和直线外一点 4.在下列直线中，与非零向量),(B A n = 垂直的直线是 A. 0=+By Ax B. 0=-By Ax C. 0=+Ay Bx D. 0=-Ay Bx 5.已知函数)(x f y =的图像与函数1 1+=x y 的图像关于原点堆成，则=)(x f A. 11+x B. 11-x C. 11+-x D. 1 1--x 6.已知△ABC 中，C B C B A sin sin sin sin sin 222++=，则=A A. 6π B. 3π C. 32π D. 6 5π 7.已知不等式x x a y y 224+≤-+对任意实数y x ,都成立，则常数a 的最小值为 A.1 B. 2 C. 3 D. 4 8.如图1，我们知道，圆环也可看作线段AB 绕圆心O 旋转一周所形成的平面图形，又圆环的面积 2 2)()(22r R r R r R S +? ?-=-=ππ.所以，圆环的面积等于是以线段r R AB -=为宽，以AB 中点绕圆心O 旋转一周所形成的圆的周长22r R +?π为长的矩形 面积.请将上述想法拓展到空间，并解决下列问题： 若将平面区域d)r 0}()(|),{(2 22<<≤+-=其中r y d x y x M 绕 y 轴旋转一周，则所形成的旋转体的体积是
第I卷 第二部分阅读理解（共两节，满分40分） 第一节（共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项，并在答题卡上将该选项涂黑。 A Many people would love to leave their jobs behind and have a life-changing adventure overseas. They imagine lying under palm trees as the sun goes down. However, life overseas is not always easy, and many are not prepared for the shock of living in an alien culture. The honeymoon period At first, for those who actually decide to move abroad, life is an exciting adventure. They enjoy exploring their new surroundings, and life seems like an extended holiday. They don’t mind trying the local cuisine and discovering the local culture. They can even afford to practice their foreign-language skills without fear of making mistakes. Trouble in paradise In many cases, when people consider moving to another country, they often fail to realize how different life will be. As time goes by, they become frustrated when language and cultural misunderstandings become a daily headache. In this stage, the visitors begin to withdraw from life in the host country and avoid spending time with local people in favor of mixing with others from their own cultural background. The road to recovery Gradually, most visitors realize they must accept the differences and not fight against them. This change encourages them to improve their language skills and slowly they manage to do the things they could easily do at home, such as opening a bank account. This new-found confidence enables them to see a side of life which very few tourists get to witness. Adjusting to life abroad can often be a real problem. The secret to overcoming it is to stop trying to change your host country: you will not succeed. If not, you risk losing your dream and having to return to the old life you wanted to leave behind. 21. Why do people moving abroad feel excited at first? A. They find foreign living much easier. B. They have the necessary language skills. C. They love the adventure and exploration. D. They enjoy meeting people from different cultures. 22. According to the author, what is the main problem many people moving abroad face? A. Homesickness. B. Culture shock C. Health problems. D. Lack of employment. 23. What would the author suggest people moving abroad do? A. Study the local language. B. Go on holidays frequently. C. Learn how to open a bank account. D. Seek out people from their home country. B Australia loves interesting money. In 1988, it was the first country to replace paper money with special plastic banknotes. Now it’s introduced a new five-dollar bill so technologically advanced that many experts are calling it the money of the future! At first glance, the new note looks much like the old one. It has the same pink colour and main pictures on the front and back. But look closer, and you will notice a clear window running down the middle, surrounded by images of the yellow Prickly Moses, a type of Australian plant. Tilt（使倾斜）the note a little and you will see the Eastern Spinebill, an Australian bird, beating its wings as if trying to fly away. Turn the bill from side to side, and you will notice the picture of a small building at the bottom of the note spins, and the image of “5” changes position. While these moveable features are impressive and entertaining, that was not the reason Australian government officials spent ten years developing them. Their primary purpose was to make it impossible for criminals to produce their own fake notes. The new five-dollar note also has something to help blind people easily identify the money. It has a raised bump alongside the top and bottom, enabling blind people to quickly determine its value. The credit for persuading the Australian government to add this all-important bump goes to 15-year-old Connor McLeod. The blind Sydney teenager came up with the idea in 2014 after being unable to tell how much money he had received for Christmas. Connor says he was so embarrassed at not being able to see the difference between notes that he only carried coins to pay for food at the school cafeteria. To
广东省佛山市2014届高三教学质量检测（二） 理综化学试题 7．下列说法正确的是 A．淀粉、油脂、氨基酸都能水解，但水解产物不同 B．甲醛可用作食品防腐剂 C．植物油和裂化汽油都能使溴水褪色 D．对“地沟油”进行分馏可以制得汽油、煤油，达到变废为宝的目的 8．下列各组离子在水溶液中能大量共存的是 A．Na+、Fe3+、I—、CO32—B．K+、Fe2+、Cl—、NO3— C．H+、Na +、SiO32—、CH3COO—D．Ag+、K+、Br—、NO3— 9．下列说法正确的是 A．常温常压下，8克O3含有0.5N A个氧原子(相对原子质量O：16) B．1mol.L—1的Ca(ClO)2溶液中含ClO—数目为2N A C．标准状况下，22.4L HCl溶于1L水中所得的盐酸含有N A个HCl分子 D．1mol Na被完全氧化生成Na2O2，失去2N A个电子 10．右图是周期表中短周期的一部分，A、C的原子序数之和等于B原子的原子序数。下列 叙述正确的是 A．B的氧化物对应的水化物一定为强酸，且只有氧化性Array B．三种元素对应的氢化物中C的氢化物稳定性最好 C．原子半径大小关系为：C＞A D．C的单质常温下为无色无味的气体 11．下列有关物质的性质和该性质的应用均正确的是 A．SiO2具有较好的导电性，可用于制造半导体材料 B．H2O2是一种绿色氧化剂，可氧化酸性高锰酸钾而产生O2 C．铜的金属活动性比铁弱，可用铜罐代替铁罐贮运浓硝酸 D．Mg在空气中燃烧发出耀眼的白光，可用于制作信号弹 12．下列有关说法错误的是 A．为保护海轮的船壳，常在船壳上镶入锌块 B．纯碱溶于热水中，去污效果增强，说明纯碱的水解反应是吸热反应 C．已知工业合成氨气△H＜0，达平衡后，升高温度，正反应速率减小，逆反应速率增大， 平衡向逆反应方向移动 D．NH3(g) + HCl(g)== NH4Cl(s) 较低温度下能自发进行，说明该反应的△H＜0
淮南市2014届高三第二次模拟考试 数学试题 (理科) 满分150分考试时间120分钟 第 I 卷 (选择题共50分 ) 一、选择题(每小题5分,共50分，每小题只有一个选项是符合题目要求的) 1. 已知复数1 23 +=i i z ，则z 的虚部是（ ）. A . 51 B. 51- C. i 51- D. 5 2- 2. 设集合A={x |1x x -＜0},B={x |0＜x ＜3},那么“m ∈A ”是“m ∈B ”的（ ）. A. 充分而不必要条件 B. 必要而不充分条件 C. 充要条件 D. 既不充分也不必要条件 3. 已知函数ππ()sin()(0,) f x x ω?ω?=+>-<<的部分图象如图所示，则?的值为（ ）. 第3题 4. 执行如图中的程序框图，若输出的结果为10,则判断框中应填（ ）. A. i < 3 B. i < 4 C. i < 5 D. i < 6 5．袋中有大小相同的编号为1到8的球各一只，自袋中随机取出两球，设η为取出两球中的较小编号，若k p 表示η取值为k )7,2,1( =k 的概率，则满足8 1> k p 的k p 个数是（ ）. A. 5 B. 4 C . 3 D. 2 6. 设12,F F 是双曲线22 22:1(0,0)x y C a b a b -=>>的两个焦点, P 是C 上一点,若126,PF PF a +=且第4题
第 页 2 12PF F ?的最小内角为30,则C 的离心率为( ) B. 7. 平面上满足线性约束条件?? ???≤--≤+≥01002y x y x x 的点),(y x 形成的区域为M ,区域M 关于直线x y 2=对称的 区域为N ,则区域M ，N 中距离最近的两点间的距离为（ ） A ．556 B ．5512 C ．538 D ．5 316 8. 已知函数???>≤-=)0()0(13)(x e x x x f x ,若方程0)(=-kx x f 恰有两个不同的实根时，则实数k 的取值范 围是（其中e 为自然对数的底数） ( ). ),1.(e A []3,1.B ),3.(+∞C (]3,.e D 9.已知数列{}n a 的通项公式为),(,1)1(1 *∈+++=N n n n n n a n 其前n 项和为n S ，则在数列 2014 321,,,,S S S S 中，有理项的项数为（ ） A . 42 B. 43 C . 44 D. 45 10.如图，在三棱锥ABC P -中,PC PB PA ,,两两互相垂直，且1,2,3===PC PB PA ,设M 是底面三角形ABC 内一动点，定义：),,()(p n m M f =，其中p n m ,,分别表示三棱锥 PAC M PBC M PAB M ---,,的体积，若),2,21()(y x M f =，且81≥+y a x 恒成立，则正实数a 的最小值是（ ） A . 22+ B . 22- C. 223- D. 246- 第 II 卷 (主观题 共100分 ) 二、填空题（每小题5分，共25分）
广州二模英语试题及答 案精选文档 TTMS system office room 【TTMS16H-TTMS2A-TTMS8Q8-TTMSHHJ8】
第I卷 第二部分阅读理解（共两节，满分40分） 第一节（共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项，并在答题卡上将该选项涂黑。 A Many people would love to leave their jobs behind and have a life-changing adventure overseas. They imagine lying under palm trees as the sun goes down. However, life overseas is not always easy, and many are not prepared for the shock of living in an alien culture. The honeymoon period At first, for those who actually decide to move abroad, life is an exciting adventure. They enjoy exploring their new surroundings, and life seems like an extended holiday. They don’t mind trying the local cuisine and discovering the local culture. They can even afford to practice their foreign-language skills without fear of making mistakes. Trouble in paradise In many cases, when people consider moving to another country, they often fail to realize how different life will be. As time goes by, they become frustrated when language and cultural misunderstandings become a daily headache. In this stage, the visitors begin to withdraw from life in the host country and avoid spending time with local people in favor of mixing with others from their own cultural background. The road to recovery Gradually, most visitors realize they must accept the differences and not fight against them. This change encourages them to improve their language skills and slowly they manage to do the things they could easily do at home, such as opening a bank account. This new-found confidence enables them to see a side of life which very few tourists get to witness. Adjusting to life abroad can often be a real problem. The secret to overcoming it is to stop trying to change your host country: you will not succeed. If not, you risk losing your dream and having to return to the old life you wanted to leave behind. 21. Why do people moving abroad feel excited at first? A. They find foreign living much easier. B. They have the necessary language skills. C. They love the adventure and exploration. D. They enjoy meeting people from different cultures. 22. According to the author, what is the main problem many people moving abroad face? A. Homesickness. B. Culture shock C. Health problems. D. Lack of employment. 23. What would the author suggest people moving abroad do? A. Study the local language. B. Go on holidays frequently. C. Learn how to open a bank account. D. Seek out people from their home country. B Australia loves interesting money. In 1988, it was the first country to replace paper money with special plastic banknotes. Now it’s introduced a new five-dollar bill so technologically advanced that many experts are calling it the money of the future! At first glance, the new note looks much like the old one. It has the same pink colour and main pictures on the front and back. But look closer, and you will notice a clear window running down the middle, surrounded by images of the yellow Prickly Moses, a type of Australian plant. Tilt（使倾斜）the note a little and you will see the Eastern Spinebill, an Australian bird, beating its wings as if trying to fly away. Turn the bill from side to side, and you will notice the picture of a small building at the bottom of the note spins, and the image of “5” changes position. While these moveable features are impressive and entertaining, that was not the reason Australian government officials spent ten years developing them. Their primary purpose was to make it impossible for criminals to produce their own fake notes.