惠州市2020届高三第二次调研考试(含参考答案)
2020届广东省惠州市高三第二次调研考试数学(文)试题
【答案】D
【解析】把已知等式变形,利用复数代数形式的乘除运算化简,再由共轭复数的概念解答。
【详解】
, , ,即 的共轭复数为 ,
故选:D.
【点睛】
本题考查复数代数形式的乘除运算,考查复数的基本概念,属于基础题。
3.若 ,且 ,则 的值为()
A. B. C. D.
【答案】A
【解析】由诱导公式可得 ,再根据平方关系计算出 ,之后利用二倍角的正弦公式即可得到答案。
5.某工厂为了解产品的生产情况,随机抽取了100个样本。若样本数据 , ,…, 的方差为8,则数据 , ,…, 的方差为()
A.8B.15C.16D.32
【答案】D
【解析】利用方差的性质,若 的方差为 ,则 的方差为 ,直接求解.
【详解】
样本数据 , ,…, 的方差为8,所以数据 , ,…, 的方差为 ,
本题选择D选项.
【点睛】
本题考查三角函数图象和性质的综合应用,熟练掌握正弦型函数的对称性及平移变换法则是解答本题的关键,属基础题.
10.函数 的图象大致是( )
A. B.
②用 联结的两个命题,只要有一个为假则这个复合命题即为假.
③根据特称命题的否定为全称命题判断.
【详解】
①不等式 ,解得 或 ,
所以 , ,“ ”是“ ”的充分不必要条件.①正确;
②若 为假命题,则 , 至少有一个为假,故②错误;
③命题 : 使得 的否定 为 ,均有 .③正确,
故选:B.
【点睛】
本题考查充分必要条件的判断,简单逻辑联结词及含有一个量词的命题的否定,属于基础题。
可得|F2M|= =b,
即有|OM|= =a,
由 ,可得 ab=16,
广东惠州市2020届高三上学期语文第二次调研卷附答案解析
广东惠州市2020届高三上学期语文第二次调研卷【满分为150分;考时150分钟】一、现代文阅读(36分)(一)论述类文本阅读(本题共3小题,9分)阅读下面的文字,完成下面小题。
语言艺术将走向何方?它的归宿究竟在哪儿?网络文字的沙尘暴吹个不息,势头不减,文字垃圾的雪球越滚越大,使人恐惧而看不到希望。
但是我们还需要一个乐观的心态,因为事物发展到极端就会走向反面,一切都会盛极而衰。
以法国为例,雨果和左拉时代就涌现出大量的报纸、刊物之类,并有大量通俗读物,但是流芳百世的语言艺术的瑰宝,也不过屈指可数。
可见语言艺术的精华由人类的智慧和心血凝聚而成,总是不可多得的。
人类语言艺术的瑰宝与人类世界同在,它的消失只有一种可能,就是人类再次回到冰河期,回到茹毛饮血的时代。
几百年过去,无论东方西方,纯粹雅正、最高最美的那部分语言艺术历久弥新,不仅没有消亡,而且仍然在生长,总量也在增加。
再看那些同期盛行与风靡的文字,现在已无人注意。
没有记忆,没有传递,没有津津乐道,没有研究、引用和欣赏。
要想了解它们,就必须去专门的图书馆和资料馆,翻阅积满厚厚尘埃的老报刊。
它们大部分早已去了应该去的地方,那就是语言的垃圾场,时间的河流将其冲刷得无影无踪。
所以,别说是分分秒秒都在刷新的网络文字,就是现在出版的百分之九十以上的纸质书,终将被埋进历史的尘埃,剥蚀和消解。
当然,这其中还会包括一部分被时代潮流所遮蔽、湮没的优秀文字。
语言文字由基本的使用工具,进步到一种艺术;衡量一个国家、一个民族文明程度的高低,衡量一段历史创造的伟大与否,也要看它语言艺术发展的高度。
虽然语言艺术不能像物质成果那样简单而直接地被消费和使用,比如《诗经》《楚辞》、唐诗宋词、雨果的《悲惨世界》、托尔斯泰的《战争与和平》、鲁迅的《野草》等,既不能入口裹腹,也无法用来居住,但它们象征着一个民族在一个历史时期的生命能力、一个民族的心灵力量,决定着这个民族在一切方面的创造强度。
惠州市2020届高三第二次调研考试(理数)
惠州市2020届高三第二次调研考试(理数) 参考答案:数学(理科)一、选择题:1.C2.B3.D4.A5.B6.A7.A8.C9.B10.A11.C12.C1.【解析】设M={x|x>1},N={x|-2≤x≤2},则M∩N=(1,2],故选C。
2.【解析】(1+i)z=1-i,z=(1+i)/(1-i)2=-i,z的共轭复数为z=i,故选B。
3.【解析】n≥2时,Sn-1=1-a^(n-1),Sn=1-a^n,两式相减,整理得Sn-Sn-1=an-1-1,即an-1=2a,a=1/3,故选D。
4.【解析】代数法:cos=|b·c|/(|b||c|),几何法:cos=b·c/|b||c|=b(a-b)/(a-b)^2=b/(a-b),故选A。
5.【解析】①属于系统抽样,故错误;②概率只说明事件发生的可能性,某次试验中不一定发生,所以并不能说明天气预报不科学,故错误;③④正确,故选B。
6.【解析】cos(5π/32)=sin(π/2-5π/32)=-sin(3π/32),故选D。
7.【解析】由集合的包含关系可知选A。
8.【解析】不超过40的素数:2,3,5,7,11,13,17,19,23,29,31,37,共12个数,其中31/2=15.5,故选C。
9.【解析】解法一:定义域为x∈(0,1)∪(1,+∞),故排除A;f(100)>1,排除C;f(40)=3+37=11+29=17+23,共3组数,所以其和等于40的概率为:(3/12)×(1/11)+(3/12)×(1/10)+(3/12)×(1/9)=1/110,故选B。
解法二:设g(x)=x-lnx-1,g(1)=0,g'(x)=1-1/x,当x∈(1,+∞),g(x)>0,g(x)单调增,当x∈(0,1),g(x)<0,g(x)单调减,则g(x)≥g(1)=0.注意:文章中的公式和符号均已修正。
广东省惠州市2020届高三第二次调研考试英语试题(Word版,含答案解析)
惠州市2020届高三第二次调研考试英语2019.10 本试卷分选择题和非选择题两部分。
满分120分(最终成绩按总分135分进行折算),考试用时120分钟。
注意事项:1.本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。
2.答题前,考生务必将自己的姓名,准考证号填写在答题卡相应的位置。
3.全部答案应在答题卡上完成,答在本试卷上无效。
4.考试结束后,将答题卡交回。
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A、B、C和D四个选项中,选出最佳选项。
ANeed a fall fix? Try one from these great places.1. Mackinac Island, MichiganThe only way to reach this famed car-free island is by boat and ferry, and once visitors arrive, they’re attracted by the history, scenery and fall colors. “It’s a throwback to years past, a little town, and there’s a big state park as well,” Blackwell says. “You’re allowed to have boats all around the island.”2. Tellico Lake, TennesseeWith nearly 400 miles of shoreline, this waterway flowing out of the Great Smoky Mountains is largely unexploited, well-protected in its natural state. Fall visitors find a range of colors reflecting in the clean waters, says Blackwell, who vacationed in the area with his family as a child. “The thick forest there just allows you to see more greenery and wildlife.”3. Dillon Reservoir, ColoradoWith an hour from Denver, this lake is home to what claims to be the nation’s highest sailing club, at an altitude of more than 9,000 feet. Marinas in the towns of Dillon and Frisco make it easy to get out on the water and to see the bright yellows and golds of fall leaves. “People are surprised that there’s boating in Colorado, and you can see the mountains just before the snowfall,” Blackwell says.4. Lake Monroe, IndianaThe state’s largest lake is surrounded by more than 13,000 acres of protected forest and three recreation areas, making it an ideal place to see fall colors, particularly from oaks and the tulip poplar, the state tree. “It’s a gem (宝石)in southern Indiana,” says Blackwell, who grew up in the area. “There are lots of different activities: canoeing, kayaking and fishing.”A.It’s like a modern city.B.Visitors can’t take boats around it.C.Visitors can see various wildlife there.D.Visitors can’t go there by cars.22.Which is suitable for someone looking for an undeveloped place for vacation?A.Mackinac Island, MichiganB.Tellico Lake, TennesseeC.Dillon Reservoir, Coloradoke Monroe, Indiana23.What do the four places have in common?A.Blackwell once travelled there .B.They are all famous tourist destinations.C.They are surrounded by thick forests.D.Visitors can enjoy fall colors thereBWhen HarmonyOS, the Chinese self-developed operating system for Huawei mobile devices, was released on Aug 9, it quickly became a hot topic on social media. Many believe it not only represents the rise of the country as a tech power, but also shows respect to classical Chinese culture by naming the system “Hongmeng” in Chinese.“Hongmeng” is a classical word from Zhuangzi. In the ancient times of Chinese legend and myths (神话), “Hongmeng” was used to describe the original state of the universe before matter existed. For HarmonyOS, “Hongmeng” indicates the developers’ aim to make an innovative operating system, unlike any other.Besides “Hongmeng”, Huawei has also registered many of its products under the names of legendary creatures from Chinese myths. For example, the company’s Kirin mobile chip got its name after a lucky monster called “Qilin”. And its server chip is called “Kunpeng”, a creature that changed from a fish into a giant bird.Many Chinese internet users and media have praised Huawei’s use of these names, “as they stand for Chinese wisdom and anci ent people’s imagination and spirit of exploration”, Global Times noted.In fact, Huawei is not alone in using traditional culture for modern ventures. Ne Zha, the new film, also portrays traditional culture in a modern context. The movie is loosely based on the well-known work of classical Chinese myth The Investiture of the Gods. Earlier this month it became the biggest animated movie in China and was called “the glory of domestic anime(国产动漫)”.Indeed, the long history and splendid classic works have given China a profound culture. Myths and legends are the creative works of tremendous imagination. As Global Times put it, today by revisiting a modern context, “ancient myths has the power to inspire imagination in young people”. After all, imagination is the beginning of creation.224.What do we know about HarmonyOS?A.Its release raised a storm of objections.B.It is named after a creature in myth.C.It combines high technology and culture.D.It’s the best operating system.25.Which of the following best expl ains “innovative” underlined in Paragraph 2?A. creativeB. modernC. popularD. intelligent26. How do the public think of Huawei’s use of the names?A. Confused.B. Unexpected.C. Approving.D. Doubtful.27.What can be inferred from the last two paragraphs?A.The film Ne Zha is not adapted from myths.B.The film Ne Zha is a big hit.C.More businesses follow Huawei’s leadD.Ancient myths is a good choice for entertainmentCPeople who sleep fewer than six hours a night are more likely to die early, researchers in University of Warwickhave found in a recent study. They discovered that people who slept for less than six hours each night were 12% more likely to die before the age of 65 than those who slept the recommended six to eight hours a night.The researchers pointed out that previous studies had shown that the lack of sleep was associated with problems like heart disease and high blood pressure. However, the researchers also found that sleeping too much was linked to an early death. Those who slept for more than nine hours a night were 30% more likely to die early, as an article in the latest Sleep suggested. That directly contradicts another passage in the same journal last month suggesting that people who slept for ten hours or longer a night were more likely to live to 100. This was thought to be because people who lived into extreme old age were healthier and therefore slept better.However, the authors of the latest research contradicted this and suggested that long sleep was a sign of underlying illnesses such as depression and low levels of physical activity. Professor Francesco Cappuccio at the University of Warwick said: “While short sleep may represent a cause of ill-health, long sleep is believed to represent more an indicator of ill-health.”He also mentioned: “Modern society has seen a gradual reduction in the average amount of sleep people take, and this pattern is more common among full-time workers, suggesting that it may be due to social pressures for longer working hours. On the other hand, the worsening of our health is often accompanied by an extension of our sleeping time.”“Consistently sleeping six to eight hours per night may be good for health. However, whether to achieve the goal depends on various factors such as the environment as well as measures of public health aimed at favourable changes of the working environments,” Professor Francesco Cappuccio added.28.What did researchers in University of Warwickhave find?A.People who sleep fewer than 6 hours each night die before 65.B.Sleeping for more than 9 hours a night does good to one’s health.C.Six to eight hours’ sleep can be appropriate for people.D.People at an old age are healthier because they sleep longer.29.What is Professor Francesco Cappuccio most likely to agree with?A.Long sleep is what causes our health problems.B.Modern people sleep less because they work longer.C.Our health becomes worse because we sleep less.D.How long we sleep depends on our education.30.What did the researcher think may help people have proper sleep?A.Social pressure.B.Longer working hours.C.Extension of sleeping time.D.Changes of working environments.31.What can be the best title for this passage?A.How Long Should We SleepB.Longer Sleep Makes Better HealthC.Time to Sleep EarlyD.The Importance of SleepDImagine a school where self-awareness is celebrated, students are encouraged to solve maths problems by writing on the walls and applying learned lessons to real life is more important than homework. These are a few of the concepts that make Space of Mind School unique.Located in a home built in 1896 in Florida, US, the program serves students in grades 2 through 12 and will accept kindergarten students next year. It also offers an afterschool program for students who attend traditional schools, as well as evening programs for adults and educators and weekend events for families.There is a different atmosphere from that of a traditional school building. Tables and brightly colored walls are white boards. In the science room, students are studying climate changes at a weather station, while in the music room, a student is solving an equation(等式) with his academic coach while he connects music theory and maths.The daily schedule at the school also stands out. “We don’t assign boring or exhaust ing homework,” said Space of Mind founder and CEO Ali Kaufman. “Instead of homework, we ask that they go home and take a video of themselves applying a lesson they learned or cooking a meal for their family that they learned how to make at school.”For lunch, instead of traditional cafeteria dishes such as pizza, the school offers organic meals made out of products from local gardens and farms. “Our students also run a business at the Delraybusiness,” Kaufman said.“We are also the first school program in Florida to start and end each day with 15 minutes of meditation(冥想),” Kaufman said. “The positive results we have been seeing in the students from meditation are amazing. We are really about infusing social, emotional and creative skills with academic and life skills.”32.Space of Mind School _________________________.A.assigns no homework.B.urges students to use what they learn.C.teaches students to earn money in class.D.focuses on knowledge learning.33.What can be inferred from the last paragraph?A.Yoga enjoys great popularity in US.B.The practice of meditation is amazing.C.The meditation session lasts 15 minutes daily.D.The students benefit from meditation.34.The underlined word “infusing” in the last paragraph probably means_______.A. emphasizingB. checkingC. developingD. helping35.What is the text mainly about?A.What makes Space of Mind School outstanding.B.Why Space of Mind School is popular in US.C.How the after-class programs of Space of Mind School are organized .D. How Space of Mind School cultivates students’ life skills.第二节(共5小题;每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。
广东省惠州市2020届高三第二次调研考试生物试题
广东省惠州市2020届高三第二次调研考试(生物)1.下列说法正确的是A.人体内激素、酶和神经递质均在发挥作用后立即失活B.水稻种子在萌发过程中有机物的含量、种类减少C.种群基因频率的改变是进化的标志D.细胞衰老意味着细胞内所有酶的活性的下降2.右图a~f表示不同细胞,据图分析错误的是A.造血干细胞可分化成多种细胞B.各类细胞功能不同,根本原因是表达的基因不同C.c和d在不同的场所发育而成D.二次免疫主要和c和d有关3.占人类基因组中近一半的“垃圾”DNA之前一直被认为是没有意义的,科学家新发现一种酶,该酶能在基因组的任何位置中“剪切”和“黏贴”“垃圾”DNA,而“垃圾”DNA的移动对细胞会产生影响。
下列关于说法错误的是( )A.该酶的成分可以是蛋白质或脂质B.该酶作用于磷酸二酯键C.该酶是由活细胞产生的有机物D.该酶有高效性和专一性4.对生长素的叙述,正确的是A.顶芽生长占优势时侧芽生长素合成受到抑制B.燕麦胚芽鞘中生长素的极性运输与光照方向无关C.草莓果实的自然生长过程与生长素无关而与乙烯有关D.温特的实验中生长素从胚芽鞘尖端基部进入琼脂块的方式是主动运输5.如图甲~丙依次表示某动物体内细胞分裂图,染色体中DNA含量的变化,不同分裂时期细胞中染色体数目、染色单体数目与染色体DNA数目关系变化。
下列叙述中正确的是()A.图甲所示细胞对应于图乙中的DE段、图丙中的②B.甲细胞分裂时期核糖体、中心体代谢活跃C.图丙中与乙图BC段对应的只有②D.图丙中引起②→③变化的原因是DNA复制6.基因污染是指在天然物种的DNA中嵌入了人工重组基因,这些外来基因可随被污染生物的繁殖、传播而发生扩散。
下列叙述错误的是( )A.基因工程间接导致了基因污染B.基因工程破坏了生物原有的基因组成C.基因工程是通过染色体的重组发生基因交换,从而获得了生物的新性状D.人类在推广转基因作物时,没有充分考虑生物和环境之间的相互影响24.下列叙述中错误的是( )A.改变NaCl溶液的浓度只能使DNA溶解而不能使其析出B.细胞代谢产物的工厂化生产体现了细胞的全能性C.用电泳法可以分离带电性质、分子大小和形状不同的蛋白质D.试管婴儿、设计试管婴儿技术均为有性生殖25.下列说法,错误的是( )A.水葫芦引进我国后泛滥成灾,违背了协调与平衡原理B.“谈梅止渴”既有神经调节又有体液调节,但以体液调节为主C.西枝江水葫芦大量繁殖增加了生物多样性D.反射活动中神经递质参与神经元间兴奋的传递26.(16分)某生物小组选取了红花湖中的4种生物:棚藻(单细胞绿藻),水绵(多细胞绿藻),菹草(高等植物)和颤藻(蓝藻),用其生长旺盛的新鲜材料在人工控制的条件下,A、B两组同时开展平行实验,进行有关光合作用的研究。
惠州市2020届高三第二次调研考试(生物)
惠州市2020届高三第二次调研考试生物1.下图表示细胞内某些关联物质或结构间的关系,下列描述错误..的是A.若①表示脂质,则②、③、④可分别表示脂肪、磷脂、固醇B.若①表示原生质层,则②、③、④可分别表示细胞膜、细胞质、细胞液C. 若①表示生物膜,则②、③、④可分别表示细胞膜、细胞器膜、细胞核膜D. 若①表示ATP,则②、③、④可分别表示腺嘌呤、核糖、3个磷酸基团2.关于细胞呼吸的叙述,错误..的是A.用酵母菌发面的原理是利用其呼吸产物CO2受热膨胀而使馒头疏松B.高等生物保留部分无氧呼吸的能力,有利于对不良环境的适应C.提倡慢跑等有氧运动是不致因剧烈运动导致氧的不足,而使肌细胞因无氧呼吸产生大量乳酸D. 鲜荔枝在无02、保持干燥和无乙烯环境中,可延长保鲜时间3.正常细胞内K+浓度远高于细胞外,细胞外Na+浓度高于细胞内。
钠钾泵又称钠钾ATP酶,它会使细胞外的Na+浓度高于细胞内,将细胞外的K+移入膜内。
以下说法错误..的是A. 钠钾泵由附着在细胞膜上的核糖体合成B.钠钾泵能维持神经细胞内低Na+高K+的环境,维持其静息电位C. 钠钾泵具有物质运输和催化功能D.Na+和K+进出细胞与细胞膜的选择透过性有关4.下列有关实验的叙述正确的是A.艾弗里实验证明从S型肺炎双球菌中提取的DNA可以使小鼠死亡B.用32P标记的噬菌体侵染未被标记的大肠杆菌,子代噬菌体的DNA都含32PC.探究DNA 是半保留复制的实验中用到了同位素示踪法和离心技术D.烟草花叶病毒感染烟草的实验说明所有病毒的遗传物质都是RNA5.非洲猪瘟是由非洲猪瘟病毒(由双链DNA 与蛋白质外壳组成)感染家猪和各种野猪引起一种急性、出血性、烈性传染病。
非洲猪瘟不是“人畜共患病”,不传染人,但该病的爆发可以直接冲击养猪业,对猪的致死率接近100%。
下列相关叙述正确的是 A.非洲猪瘟病毒中没有RNA ,其遗传信息的传递不遵循中心法则 B.非洲猪瘟病毒的遗传物质彻底水解,可得到四种脱氧核苷酸 C.非洲猪瘟病毒侵染进入猪体内后,在猪的内环境中即可以迅速增殖 D.DNA 分子中4种碱基的特定排列顺序是该病毒特异性的物质基础6.1970年,袁隆平和他的助手李必湖在海南岛发现了一株雄性不育野生稻,该水稻外部形态和普通水稻相似,但它的花粉不育、雌蕊正常。
2020届广东省惠州市高三第二次调研考试数学(理)试题(解析版)
由已知得 ,故 ,∵ 的面积为 ,
∴ ,∴ ,又 ,
∴ , ,∴ ,
又 ,∴ ,
∴ .
即 的取值范围为 .
故答案为:
【点睛】
本题考查了椭圆的简单性质,函数最值的计算,熟练掌握椭圆的基本性质是解题的关键,属于中档题.
三、解答题
17.在 中,角 的对边分别为 ,已知
(1)求 ;
(2)求 的值.
【答案】(1) ;(2) .
【解析】试题分析:画圆:(x–1)2+(y–1)2=2,如图所示,则(x–1)2+(y–1)2≤2表示圆及其内部,设该区域为M.画出 表示的可行域,如图中阴影部分所示,设该区域为N.可知N在M内,则p是q的必要不充分条件.故选A.
【考点】充要条件的判断,线性规划
【名师点睛】本题考查充分性与必要性的判断问题,首先是分清条件和结论,然后考察条件推结论,结论推条件是否成立.这类问题往往与函数、三角、不等式等数学知识相结合.本题的条件与结论可以转化为平面区域的关系,利用充分性、必要性和集合的包含关系得出结论.
当点P被看作是双曲线上的点时,有 ,
两式联立消去 得 ,即 ,
所以 ,又 ,
所以 ,整理得 ,
解得 或 (舍去),所以 ,
即双曲线的离心率为 ,
故选A.
【点睛】
该题考查的是有关椭圆和双曲的有关问题,涉及到的知识点有椭圆和双曲线的定义,新定义,椭圆和双曲线的离心率,余弦定理,属于中档题目.
11.已知矩形 , , ,将 沿对角线 进行翻折,得到三棱锥 ,则在翻折的过程中,有下列结论:
假设AB⊥CD,由线面垂直的判断和性质,可判断④.
【详解】
① ,当平面 平面 时,三棱锥 的高最大,此时体积最大值为 ,①错误;
广东省惠州市2020届高三第二次(10月)调研考试化学试题
惠州市2020届高三第二次调研考理综化学试题相对原子质量:H:1 C:12 N:14 O:16 K: 39 Fe:56 Cu:64 Cl:35.57.中国丝绸有五千年的历史和文化。
古代染坊常用某种“碱剂”来精炼丝绸,该“碱剂”的主要成分是一种盐,能促进蚕丝表层的丝胶蛋白杂质水解而除去,使丝绸颜色洁白、质感柔软、色泽光亮。
这种“碱剂”可能是A.明矾 B.漂白粉 C.草木灰 D.熟石灰8.下列说法正确的是A.SiO2为非金属的酸性氧化物,其不能与任何酸发生化学反应B.SO2能使品红溶液、溴水褪色,分别说明SO2具有强氧化性、还原性C.将AlCl3溶液和Al2(SO4)3溶液分别蒸干和灼烧,最终所得产物的成分均为Al2O3D.反应物和生成物各具有的总能量决定了该反应是放热反应还是吸热反应9.下列关于2-环己基丙烯()和2-苯基丙烯()的说法中正确的是A. 二者均为芳香烃B. 2-苯基丙烯分子中所有碳原子一定共平面B.46g NO2和N2O4的混合气体中,含有的氮原子数为1N AC.1L1.0mol/L的盐酸中含有HCl分子数为N AD.一定条件下,将2molSO2与1molO2充分反应,得到SO3的分子数为2N A12.元素周期表中前三周期部分元素的原子序数与常见价态的关系图如下。
若用原子序数表示对应元素,下列说法中不正确的是A.a与d的非金属性比较:a> dB. 原子半径大小:b>c>a>d>eC. a可以形成两种氢化物D. b、c、e的最高价氧化物对应水化物之间均可反应13. 下图是不同温度(T1、T2)下溶液中水的电离常数Kw变化曲线,有关说法正确的是A.图中温度T1 <T2B.T1温度下pH=6的溶液有弱酸性C.两条曲线中四个点Kw间的关系:B>A=D=ED.E、D两点水的电离均被抑制,而K w相等27. (14分)高铁酸钾(K2FeO4)具有高效的消毒作用,为一种新型非氯高效消毒剂。
惠州市2020届高三第二次调研考试(理数)
惠州市2020届高三第二次调研考试数学(理科)数学(理科)参考答案一、选择题:1.【解析】1,|22M x x N x x =>=-≤≤,所以12MN =,,故选C .2.【解析】(1)z 1i i +=-,21(1)2z 1(1)(1)2i i ii i i i ---====-++-,z 的共轭复数为z i =,故选B . 3.【解析】11121n n n n S a n S a --=-⎧≥⎨=-⎩时,,两式相减,整理得111,,2a =∴ 所以{}n a 是首项为12,公比为12的等比数列,55111223113212S ⎛⎫⎛⎫- ⎪ ⎪ ⎪⎝⎭⎝⎭∴==-,故选D .4.【解析】代数法:222cos ,22(2a a a 鬃-?-<>=====-×--?b c b c b cb b,故选A. 几何法:5.【解析】①属于系统抽样,故错误;②概率只说明事件发生的可能性,某次试验中不一定发生,6.,π2α-≤≤ 2sin 2339∴⎝⎭,故选A. 7.【解析】如图:,由集合的包含关系可知选A .8.【解析】不超过40的素数:2,3,5,7,11,13,17,19,23,29,31,37,共12个数,其中4033711291723=+=+=+,共3组数,所以其和等于40的概率为:2123122C =.故选C . 9.【解析】解法一:定义域为(0,1)(1,)x ∈+∞,故排除A ;(100)0f >,排除C ;1()0100f >,排除D ;故选B .解法二:设()ln 1g x x x =--,(1)0g =,'1()1g x x=-,当(1,)x ∈+∞,'()0g x >,()g x 单调增,当(0,1)x ∈,'()0g x <,()g x 单调减,则()(1)0g x g ≥=.故1()ln 1f x x x =--的定义域为(0,1)(1,)x ∈+∞,且()f x 在(0,1)x ∈上单调增,(1,)x ∈+∞上单调减,()0f x >,故选B .解法三:1()ln 1f x x x =--定义域为(0,1)(1,)x ∈+∞,故排除A ;当0x →时,()1ln 1,0ln 1x x x x --→+∞∴>--,排除D ; 当x →+∞时,1ln 10,0ln 1x x x x -->∴>--,排除C ;故选B . 10.【解析】设椭圆、双曲线离心率分别为1212,c ce e a a ==,设12,PF x PF y ==,由椭圆、双曲线定义得1122122,2x y a x a a x y a y a a +==+⎧⎧∴⎨⎨-==-⎩⎩,在12PF F ∆中,由余弦定理得 ()()()222222120121222122421cos cos 60,,3.222a a c x y c F PF a a xy a a +-+-∠==∴=∴=-又2221212221221,,3,c c ce e a a c a c e a a a ⋅=⋅=∴=∴=∴==故选A. 11. 【解析】①13D ABC ABC V S h -∆=⋅,当平面ADC ⊥平面ABC 时,三棱锥D ABC -的高最大,此时体积最大值为1111324D ABC V -=⨯⨯=,①错误;②设AC 的中点为O ,则由,Rt ABC Rt ADC ∆∆知,OA OB OC OD ===,所以O 为三棱锥D ABC -外接球的球心,其半径为112AC =,所以外接球体积为43π,即三棱锥D ABC -的外接球体积不变,②正确;③由①的解析过程知,三棱锥D ABC -的体积最大值时,平面ADC ⊥平面ABC ,所以二面角D AC B --的大小是090,③错误;④当ADC ∆沿对角线AC 进行翻折到使点D 与点B 的,即BD =在BCD ∆中,222BC BD CD =+,所以CD BD ⊥,又C D A D ⊥,翻折后此垂直关系没有变,所以CD ⊥平面ABD ,所以CD AB ⊥,即异面直线AB 与CD 所成角的最大值为090,④正确. 故选C .12.【解析】当()2x k k Z m πππ=+∈,即212k x m +=时,()f x取得极值存在0x 使[]22020)(m x f x <+成立,亦即存在k 使()()22123120k k m -++<成立,因此,只需()()2123k k -+最小即可,即0k =或1k =-时不等式成立即可,所以23120m -+<,即24m >,所以()(),22,m ∈-∞-⋃+∞. 故选C .二.填空题:本题共4小题,每小题5分,共20分,其中第15题第一空3分,第二空2分。
惠州市2020届高三第二次调研考试参考答案
惠州市2020届高三第二次调研考试参考答案阅读理解21-25:DBDCA 26-30: CBCBD 31-35: ABDCAA篇21-23: DBD21.D; 由第一小标题段The only way to reach this famed car-free island is by boat and ferry...可知。
22.B; 由第二个小标题段... this waterway flowing out of the Great Smoky Mountains is largely undeveloped.可知。
23.D; 四个地方都提到fall colorsB篇24-27: CACB本文从华为的鸿蒙系统,麒麟和鲲鹏芯片,谈到电影《哪吒之魔童降世》,它们的命名都是将经典的古代神话都赋予了现代意义,彰显了中国人的浪漫与智慧。
24.C; 细节理解题由第一段“Many believe it not only represents the rise of the countryas a tech power, but also shows respect to classical Chinese culture by naming the system “Hangmen” in Chinese. ” 许多人都认为,该操作系统不仅代表着中国作为科技大国的崛起,系统名字“鸿蒙”更是向中华古典文化致敬。
由此可知,C项正确。
25.A; 词意猜测题根据此句中的“unlike any other”可知,“鸿蒙”系统是一个有别于其他系统的有创意的操作系统。
故选A。
26.C; 细节理解题根据第五段“Many Chinese internet users and media have praisedHawaii’s use of these names, “as they stand for Chinese wisdom and ancient people’s imagination and spirit of exploration”, Global Times noted.” 可知,媒体和网民对这些名字是非常赞许的。
广东省惠州市2020届高三物理第二次调研试题(含解析)
广东省惠州市2020届高三物理第二次调研试题(含解析)1.一只蜗牛沿着树枝缓慢地从A 点爬到B 点,此过程中树枝对蜗牛作用力大小A. 保持不变B. 变大C. 变小D. 先变小后变大 【答案】A 【解析】【详解】对蜗牛进行受力分析,有向下的重力和树枝对蜗牛的作用力,因蜗牛缓慢爬行,说明蜗牛处于平衡状态,所受的合力为零,因此,树枝对蜗牛的作用力大小等于蜗牛的重力,保持不变。
A. 保持不变。
与结论相符,故A 正确;B.变大。
与结论不符,故B 错误;C.变小。
与结论不符,故C 错误;D. 先变小后变大。
与结论不符,故D 错误;2.伸出手掌水平托起物体,由静止开始竖直向上运动,直至将物体抛出, 在物体离开手的瞬间,以下说法正确的是 (不计空气阻力) A. 手的加速度方向向上B. 手的加速度大于重力加速度C. 物体的加速度大于重力加速度D. 物体的加速度方向向上【答案】B 【解析】【详解】AB. 手掌由于受人的作用力减速较快,而物体由于惯性继续向上运动,物体离开手的时候,仍要受到重力,所以物体的加速度大小为g ,方向向下。
要使物体脱离,手掌的加速度的大小要大于g ,方向向下。
故A 错误,B 正确;CD.物体的运动是由于手对物体的作用形成的,在物体和手掌分离的瞬间,物体由于惯性继续向上运动,仍要受到重力,所以物体的加速度大小为g ,方向向下。
故C 错误,D 错误。
3.高铁列车在启动阶段的运动可看作初速度为零的匀加速直线运动.在启动阶段,列车的动能( )A. 与它所经历的时间成正比B. 与它的位移成正比C. 与它的速度成正比D. 与它的动量成正比 【答案】B 【解析】【详解】AC .根据初速度为零匀变速直线运动规律可知,在启动阶段,列车的速度与时间成正比,即v =at ,由动能公式E k =12mv 2,可知列车动能与速度的二次方成正比,与时间的二次方成正比,选项AC 错误;B .由v 2=2ax ,可知列车动能与位移x 成正比,选项B 正确;D .由动量公式p =mv ,可知列车动能E k =12mv 2=22p m,即与列车的动量二次方成正比,选项D错误。
惠州市2020届高三第二次调研考试(文数)
惠州市2020届高三第二次调研考试数学(文科)数学(文科)参考答案一、选择题: 1.【解析】1Q x x =>,所以12P Q =,,故选C .2.【解析】(1)z 2i i -=+,2(2)(1)13z 1(1)(1)2i i i ii i i ++++===--+,1322z i =-,z 的共轭复数为13z i =-,故选D . 3. A . 4.2部专著都不是汉、魏、晋、南北朝时期专著的情况只有1种,根据对立事件的概率公式可知选B . 5.【解析】样本数据1x ,2x ,⋅⋅⋅,10x 的方差为8,所以数据121x -,221x -,⋅⋅⋅,1021x - 的方差为22832⨯=,故选D .6.【解析】不等式2320x x -+≥,解得2x ≥或1x ≤,所以2x >⇒2320x x -+≥,2320x x -+≥⇒/2x >,“2x >”是“2320x x -+≥”的充分不必要条件. ①正确;若p q ∧为假命题,则,p q 至少有一个为假,故②错误;命题:p x R ∃∈使得210x x ++<的否定p ⌝为x R ∀∈,均有210x x ++≥.③正确,故答案选B. 7.【解析】该几何体是一个半球上面有一个三棱锥,体积为:3111411113223266V π⎛=⨯⨯⨯⨯+⨯⨯=+ ⎝⎭,故选C . 8.【解析】双曲线22114x C y -=:的离心率为2,设2(,0)F c ,双曲线2C 一条渐近线方程为b y x a =,可得2|F M =b ,即有||OM a ==,由216OMF S =,可得1162ab =,即32ab =,又222+a b c =且=c a ,解得=84a b c ==,,即有双曲线的实轴长为16.故选D .9.【解析】由题意可得:2()32k k Z ππϕπ⨯+=+∈,据此可得:()6k k Z πϕπ=-∈,令k =0可得:6πϕ=-,选项A 错误;函数的解析式为:()2sin 26f x x π⎛⎫=- ⎪⎝⎭,若0,2x π⎡⎤∈⎢⎥⎣⎦,则52,666x πππ⎡⎤-∈-⎢⎥⎣⎦,函数不具有单调性;由()f x 的图象向左平移6π个单位可得到2sin 22sin 2666y x x πππ⎡⎤⎛⎫⎛⎫=+-=+ ⎪ ⎪⎢⎥⎝⎭⎝⎭⎣⎦的函数图象,选项C 错误;由()f x 的图象向左平移12π个单位可得到2sin 22sin 2126y x x ππ⎡⎤⎛⎫=+-= ⎪⎢⎥⎝⎭⎣⎦的图象,选项D 正确.10.【解析】设()ln 1g x x x =--,(1)0g =,'1()1g x x=-,当(1,)x ∈+∞,'()0g x >,()g x 单调增,当(0,1)x ∈,'()0g x <,()g x 单调减,则()(1)0g x g ≥=.故1()ln 1f x x x =--的定义域为(0,1)(1,)x ∈+∞,且()f x 在(0,1)x ∈上单调增,(1,)x ∈+∞上单调减,()0f x >,故选B .(另解)1()ln 1f x x x =--定义域为(0,1)(1,)x ∈+∞,故排除A ;当0x →时,()1ln 1,0ln 1x x x x --→+∞∴>--,排除D ; 当x →+∞时,1ln 10,0ln 1x x x x -->∴>--,排除C ;故选B . 11. 【解析】由题意得2214n n a a +-=,214a =,所以数列{}2n a 是以4为首项4为公差的等差数列,则24(1)44n a n n =+-=,数列}{n a的各项均为正数,所以n a =.则1112n n a a +==+,故数列⎭⎬⎫⎩⎨⎧++n n a a 11的前n 项和111)2))(11)522n +++-+-=,所以120n =.故选B .12.【解析】由已知得22b =,故1b =;∵1F AB △∴()1222a cb -=,∴2a c -=()()2221a c a c a cb -=-+==, ∴2a =,c =()12212121111112444PF PF a PF PF PF PF PF PF PF PF ++===--+, 又122PF ≤≤,∴211144PF PF ≤-+≤,∴121114PF PF ≤+≤. 即1211PF PF +的取值范围为[]14,.故选D . 二.填空题:本题共4小题,每小题5分,共20分,其中第16题第一空3分,第二空2分。
广东省惠州市2020届高三第二次调研考试文科数学试题参考答案
广东省惠州市高三第二次调研考试文科数学试题&参考答案全卷满分150分,时间120分钟.一.选择题:本大题共12小题,每小题5分,共60分。
在每个小题给出的四个选项中,只有一项是符合题目要求的。
1.设集合{}25A x x =≤≤,{}*21,B x x n n N ==-∈,则A B =( ) (A) {}1,3(B) {}1,7 (C) {}3,5(D) {}5,72.已知复数z 的共轭复数为z ,若()12z i i -=(i 为虚数单位),则z =( ) (A) i (B) 1i - (C) 1i -- (D) i -3.已知等差数列{}n a 的前n 项和为n S ,且23415a a a ++=,713a =,则5S =( ) (A) 28 (B) 25 (C) 20 (D) 184.已知双曲线2222:1(0,0)x y C a b a b -=>>的渐近线方程为12y x =±,则双曲线C 的离心率为 ( )(A)2(B)25.若,,,则( ) (A)(B)(C)(D)6.已知1tan 2α=,且3,2παπ⎛⎫∈ ⎪⎝⎭,则cos 2πα⎛⎫-= ⎪⎝⎭ ( ) 0.52a =log 3b π=22log sin 5c π=b c a >>b a c >>c a b >>a b c >>(A) 5-5(C) 5(D) 5-7.某商场为了了解毛衣的月销售量y (件)与月平均气温x (℃)之间的关系,随机统计了某4个月的月销售量与当月平均气温,其数据如下表:由表中数据算出线性回归方程y bx a =+中的2b =-,气象部门预测下个月的平均气温约为6℃,据此估计该商场下个月毛衣销售量约为( )件. (A) 46 (B) 40 (C) 38 (D) 58 8.如图,某几何体的三视图是三个全等的等腰直角三角形, 且直角边长都等于1,则该几何体的外接球的体积为((A) 12π (C) 3π (D) 43π 9.已知等边三角形△ABC 的边长为2,其重心为G ,则BG CG ⋅=( ) (A) 2(B) 14-(C) 23- (D) 310.设12,F F 为椭圆22195x y +=的两个焦点,点P 在椭圆上,若线段1PF 的中点在y 轴上,则21PF PF 的值为( )(A)514 (B) 59 (C) 49 (D) 51311.将函数()2sin(2)6f x x π=+的图象向左平移12π个单位,再向上平移1个单位,得到()g x 的图象,若12()()9g x g x ⋅=,且12,[2,2]x x ππ∈-,则122x x -的最大值为( ) (A)256π (B) 4912π (C) 356π (D) 174π12.已知函数()1,0()ln ,0kx x f x x x ->⎧⎪=⎨--<⎪⎩,若函数()f x 的图象上关于原点对称的点有2对,则实数k 的取值范围是( ) (A) (,0) (B) 1(0,)2(C) (0,) (D) (0,1)二.填空题:本大题共4小题,每小题5分。
广东省惠州市2020届高三第二次调研考试化学答案
惠州2020高三调研(二)化学参考答案7.C8.D 9. C 10.D 11.B 12.B 13.C 27.(14分)⑴ 强氧化性(1分,(写“氧化性”也给分)⑵ 2Fe 2++Cl 2== 2Fe 3++2Cl -(2分,物质正确但未配平得1分,下同) (3) Fe 2O 3 (1 分) ; 2.94≦pH <7.60 (2分“≦”写成“<”不扣分)(4)2Fe(OH)3 + 3ClO -+4OH -== 2FeO 42-+3Cl -+ 5H 2O (2分) (5) NaOH (1分 写KOH 也给分)(6) K 2FeO 4的溶解度比Na 2FeO 4的小,加饱和KOH ,析出更多Na 2FeO 4晶体 (2分,只要正确指出溶解性或溶解度差异即可得2分)⑺%cV w 335(2分) ;偏高(1分)28.(14分) ⑴ +3 (1分,无“+”不扣分)⑵ 关闭分液漏斗的旋塞,将C 装置的导管插入烧杯中的水面下,微热烧瓶,导管口有气泡产生,停止加热,导管口形成一段水柱,则气密性良好(其他合理也给分)。
(2分)⑶ ① 2SO 2 + Zn ==ZnS 2O 4(2分)② Zn 2+ + 2OH -Zn(OH)2↓(2分); ③ 过滤(1分) 乙醇(1分) ⑷ 吸收SO 2,防止污染空气;隔离空气,防止空气中的O 2将产物氧化(2分) ⑸ 取少量产品溶于足量稀盐酸,静置,取上层清液(或过滤,取滤液),滴加BaCl 2溶液,若出现沉淀则说明含有Na 2SO 4杂质 (3分)29.(15分) (1) ① 64 (2分 ,没写单位不扣分) ② +247.6(2分)(2) ① 温度超过250℃时,催化剂的催化效率降低(2分)② 增大反应压强或增大CO 2的浓度(2分)(3) ① a (3分)② CO 2 + Li 4SiO 4Li 2CO 3 + Li 2SiO 3 (2分,未写成可逆符号扣1分) (4) CO 2 + 2e - == CO +O 2 - (2分)34.(15分) (1)1s 22s 22p 63s 23p 63d 104s 1或[Ar]3d 104s 1 (2分) ;(2)O >C >H (2分)(3) ① N 2 (2分) ② sp 3 (2分) ③(2分)(4) 4 (2分)(5)310)2104()5.3564(4-⨯⋅+a ρ (3分)35.(15分) ⑴ 取代反应(1分) 氧化反应(1分)⑵ 羟基、硝基 C 13H 18N 2OBr 2(1+1+1分)⑶ NH 2N OH(2分)⑷CHO NO 2+NH 2NO 2NOH+H 2O (2分,漏水、漏条件合扣1分 )(5) (3分)⑹(3分,两个结构简式各1分,两个条件共1分)。
惠州市2020届高三第二次调研考试参考答案.doc
惠州市 2020 届高三第二次研考参考答案理解21-25 : DBDCA 26-30: CBCBD31-35: ABDCAA 篇 21-23: DBD21. D; 由第一小段The only way to reach this famed car-free island is by boat and ferry...可知。
22.B; 由第二个小段 ... this waterway flowing out of the Great Smoky Mountains is largelyundeveloped. 可知。
23.D; 四个地方都提到 fall colorsB 篇 24-27 : CACB本文从的蒙系,麒麟和芯片,到影《哪吒之魔童降世》,它的命名都是将典的古代神都予了代意,彰了中国人的浪漫与智慧。
24. C; 理解由第一段“ Many believe it not only represents the rise of the country as a techpower, but also shows respect to classical Chinese c ulture by naming the system “Hangmen”in Chinese. ” 多人都,操作系不代表着中国作科技大国的崛起,系名字“ 蒙”更是向中古典文化致敬。
由此可知,C正确。
25. A; 意猜根据此句中的“ unlike any other ”可知,“ 蒙”系是一个有于其他系的有意的操作系。
故A。
26. C; 理解根据第五段“Many Chinese internet users and media have praised Hawaii ’s useof these names, “as they stand for Chinese wisdom and ancient people ’s imagination and spirit of exploration ”, Global Times noted. ” 可知,媒体和网民些名字是非常的。
广东省惠州市2020届高三第二次调研考试语文和参考答案
惠州市2020届高三第二次调研考试试题语 文本试卷满分为150分。
考试用时150分钟。
注意事项:1.答卷前,考生务必用黑色字迹的钢笔或签字笔将自己的姓名和考生号、试室号、座位号填写在答题卷的相应位置上。
2.考生务必用黑色字迹的钢笔或签字笔作答,答案不能答在试卷上,必须写在答题卷的各题目指定区域内相应位置上;如需改动,先划掉原来的答案,然后再写上新的答案;不准使用铅笔和涂改液。
一、现代文阅读(36分)(一)论述类文本阅读(本题共3小题,9分)阅读下面的文字,完成1~3题。
语言艺术将走向何方?它的归宿究竟在哪儿?网络文字的沙尘暴吹个不息,势头不减,文字垃圾的雪球越滚越大,使人恐惧而看不到希望。
但是我们还需要一个乐观的心态,因为事物发展到极端就会走向反面,一切都会盛极而衰。
以法国为例,雨果和左拉时代就涌现出大量的报纸、刊物之类,并有大量通俗读物,但是流芳百世的语言艺术的瑰宝,也不过屈指可数。
可见语言艺术的精华由人类的智慧和心血凝聚而成,总是不可多得的。
人类语言艺术的瑰宝与人类世界同在,它的消失只有一种可能,就是人类再次回到冰河期,回到茹毛饮血的时代。
几百年过去,无论东方西方,纯粹雅正、最高最美的那部分语言艺术历久弥新,不仅没有消亡,而且仍然在生长,总量也在增加。
再看那些同期盛行与风靡的文字,现在已无人注意。
没有记忆,没有传递,没有津津乐道,没有研究、引用和欣赏。
要想了解它们,就必须去专门的图书馆和资料馆,翻阅积满厚厚尘埃的老报刊。
它们大部分早已去了应该去的地方,那就是语言的垃圾场,时间的河流将其冲刷得无影无踪。
所以,别说是分分秒秒都在刷新的网络文字,就是现在出版的百分之九十以上的纸质书,终将被埋进历史的尘埃,剥蚀和消解。
当然,这其中还会包括一部分被时代潮流所遮蔽、湮没的优秀文字。
语言文字由基本的使用工具,进步到一种艺术;衡量一个国家、一个民族文明程度的高低,衡量一段历史创造的伟大与否,也要看它语言艺术发展的高度。
(20191031)惠州市2020届高三第二次调研考试参考答案
惠州市 2020 届高三第二次调研考试参考答案阅读理解21-25: DBDCA26-30: CBCBD31-35: ABDCAA 篇 21-23: DBD21 . D; 由第一小标题段 The only way to reach this famed car-free island is by boat and ferry... 可知。
22 . B; 由第二个小标题段 ... this waterway flowing out of the Great Smoky Mountains is largely undeveloped. 可知。
23 . D; 四个地方都提到 fall colorsB 篇 24-27: CACB本文从华为的鸿蒙系统,麒麟和鲲鹏芯片,谈到电影《哪吒之魔童降世》,它们的命名都是将经典的古代神话都赋予了现代意义,彰显了中国人的浪漫与智慧。
24 . C; 细节理解题由第一段“ Many believe it not only represents the rise of the country as atech power, butalso shows respect to classical Chinese c ulture by naming thesystem“ Hangmen” in Chinese许多人.都认”为,该操作系统不仅代表着中国作为科技大国的崛起,系统名字“鸿蒙”更是向中华古典文化致敬。
由此可知, C 项正确。
25 . A; 词意猜测题根据此句中的“ unlike any other 可知,”“鸿蒙”系统是一个有别于其他系统的有创意的操作系统。
故选 A。
26 . C; 细节理解题根据第五段“ ManyChinese internet users and media have praised Hawaii ’s use of these names, “ as they stand for Chinese wisdom and ancientpeople’ s imagination and spirit ofexplorationTimes noted. 可”知,媒体和网民对这些名字是非常赞许的。
惠州市2020届高三第二次调研考试理科数学试卷含答案
④在回归直线方程 y? 0.1x 10 中,当解释变量 x 每增加 1 个单位时,预报变量 y? 增加 0.1 个单位.
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ABC 的外接球体积不变;
③三棱锥 D ABC 的体积最大值时,二面角 D AC B 的大小是 60 ;
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其中正确的是(
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惠州市2020届高三第二次调研考试地理和参考答案
一、选择题:本题共35小题,每小题 4 分,共 140 分。
在每小题给出的四个选项中,有一项是符合题目要求的。
丹麦农业高度现代化,家庭农场与农业合作社历史悠久。
家庭农场专注于种植、养殖等直接生产活动,合作社专注于流通、营销,后发展到培育良种、打造品牌、加工增值和拓展市场,形成农业—食品产业体系,实现“抱团销售”。
据此完成1~3题。
1.农业合作社的产生,主要是因为家庭农场①地理位置偏僻②生产规模较小③生产经营分散④机械化水平高A.①②B.②③C.②④D.③④2.农业合作社数量减少而规模扩大,主要是因为A.农业技术进步 B.劳动成本上升C.农场规模扩大 D.市场竞争加剧3.丹麦农业能持续发展,主要得益于A.产研销一体化 B.农场历史悠久C.欧盟市场广阔 D.国家政策扶持胡同是我国一种传统的开放型街区,以居住功能为主。
下图示意北京某胡同空间布局,道路转折距离一般不超过30米。
据此完成4~6题。
4.与现代城市多数新型居住社区相比,胡同社区A.土地利用率较低 B.基础设施更完善C.绿地面积比重大 D.公共活动空间小5.胡同虽开放但能保持较为安静的居住氛围,其主要原因是A.邻里隔离 B.道路分级 C.人口较少 D.居住分散6.目前我国正倡导住区开放。
胡同街区启示我国兴建开放型住宅小区时应注重A.增加绿地面积 B.增加步行道路C.构建私密空间 D.完善安保设施生育高峰波动变化对社会影响较大,下图为美国20-64岁人口年龄结构变化图。
据此完成7~8题。
7.引起图示年龄结构变化的生育高峰期发生在A.1930-1945年 B.1945-1965年C.1965-1985年 D.1985-2005年8.1985~2015年,美国A.老龄化增速快 B.劳动力相对稳定C.住房需求激增 D.出生率基本不变气象谚语凝聚了古人认识自然的智慧,有一定的科学性,但也有明显的地域性。
某地理研学团队通过记录我国华北某县天气实况(下表为部分记录摘取),开展气象谚语“久晴大雾雨,久雨大雾晴”验证实践。
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惠州市2020届高三第二次调研考试英语2019.10 本试卷分选择题和非选择题两部分。
满分120分(最终成绩按总分135分进行折算),考试用时120分钟。
注意事项:1. 本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。
2. 答题前,考生务必将自己的姓名,准考证号填写在答题卡相应的位置。
3. 全部答案应在答题卡上完成,答在本试卷上无效。
4. 考试结束后,将答题卡交回。
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。
ANeed a fall fix? Try one from these great places.1.Mackinac Island, MichiganThe only way to reach this famed car-free island is by boat and ferry, and once visitors arrive, they are attracted by the history, scenery and fall colors.“It’s a throwback to years past, a little town, and there’s a big state park as well,”Blackwell says. “ You’re allowed to have boats all around the island.”2.Tellico Lake, TennesseeWith nearly 400 miles of shoreline, this waterway flowing ou of he Great Smoky Mountains is largely unexploited, well-protected in its natural state. Fall visitors find a range of colors reflecting in the clean waters, says Blackwell, who vacationed in the area with his family as a child. “The thick forest there just allows you to see more greenery and wildlife."3.Dillon Reservoir, ColoradoWith an hour from Denver, this lake is home to what claims to be the nation's highest sailing club, at an altitude of more than 9,000 feet. Marinas in the towns of Dillon and Frisco make it easy to get out on he water and to see the bright yellows and golds of fall leaves. “ People are surprised that there's boating in Colorado, and you can see the mountains just before the snowball," Blackwell says.4. Lake Monroe, IndianaThe state’s largest lake is surrounded by more than 13,000 acres of protected forest and three recreation areas, making it an ideal place to see fall colors, particularly from oaks and the tulip poplar, the state tree. “ It’s a gem (宝石) in southern Indiana," says Blackwell, who grew up in the area. “There are lots of different activities: canoeing, kayaking and fishing.”21.What is special about Mackinac Island?A.It’s like a modern city.B. Visitors can’t take a boat around it.B.Visitors can see various wildlife there. D. Visitors can’t go there by cars.22.Which is suitable for someone looking for an undeveloped place for vacation?A.Mackinac Island, MichiganB. Tellico Lake, TennesseeC.Dillon Reservoir, ColoradoD. Lake Monroe, Indiana23. What do the four places have in common?A. Blackwell once travelled there.B. They are all famous tourist destinations.C. They are surrounded by thick forests.D. Visitors can enjoy fall colors there.BWhen HarmonyOs, the Chinese self-developed operating system for Huawei mobile devices, was released on Aug 9, it quickly became a hot topic on social media. Many believe it not only represents the rise of the country as a tech power, but also shows respect to classical Chinese culture by naming the system "Hongmcng " in Chinese."Hongmeng" is a classical word from Zhuangzi. In the ancient times of Chinese legend and myths (神话),“Hongmeng" was used to describe the original state of the universe before matter existed. For HarmonyOS, "Hongmeng" indicates the developers’ aim to make an innovative operating system, unlike any other.Besides "Hongmeng'", Hunwei has also registered many of its products under the names of legendary creatures from Chinese myths. For example, the company's Kirin mobile chip got its name after a lucky monster called "Qilin". And its server chip is calked "Kunpeng”, a creature that changed from a fish into a giant bird.Many Chinese Internet users and media have praised Huawei's use of these names," as they stand for Chinese wisdom and ancient people’s imagination and spirit of exploration”, Global Times noted.In fact, Huawei is not alone in using traditional culture for modern ventures. Ne Zha, the new film, also portrays traditional culture in a modern context. The movie is loosely based on the well-known work of classical Chinese myth The Investiture of the Gods. Earlier this month it became the biggest animated movie in China andwas called “ the glory of domestic anime (国产动漫)”.Indeed, the long history and splendid classic works have given China a profound culture. Myths and legends are the creative works of tremendous imagination. As Global Times put it, today by revisiting a modern context, “ancient myths has the power to inspire imagination in young people”. After all, imagination is the beginning of creation.24.What do we know about HamonyOS?A.Its release raised a storm of objections.B.It is named after creature in myth.C.It combines high technology and culture.D.It's the best operating system.25.Which of the following best explains "innovat ive” underlined in Paragraph 2?A.creativeB. modernC. popularD. intelligent26. How do the public think of Huawei's use of the names?A. Confused.B. Unexpected.C. Approving.D. Doubtful.27. What can be inferred from the last two paragraphs?A. The film Ne Zha is not adapted from myths.B. The film Ne Zha is a big hit.C. More businesses follow Huawei's lead.D. Ancient myths is a good choice for entertainment.CPeople who sleep fewer than six hours a night are more likely to die early, researchers in University of Warwick have found in a recent study. They discovered that people who slept for less than six hours each night were 12% more likely to die before the age of 65 than those who slept the recommended six to eight hours a night.The researchers pointed out that previous studies had shown that the lack of sleep was associated with problems like heart disease and high blood pressure. However, the researchers also found that sleeping too much was linked to an early death. Those who slept for more than nine hours a night were 30% more likely to die early, as an article in the latest Sleep suggested. That directly contradicts another passage in the same journal last month suggesting that people who slept for ten hours or longer a night were more likely to live to 100. This was thought to be because people who lived into extreme old age were healthier and therefore slept better.However, the authors of the latest research contradicted this and suggested that long sleep was a sign ofunderlying illnesses such as depression and low levels of physical activity. Professor Francesco Cappuccio at the University of Warwick said: “While short sleep may represent a cause of ill-health, long sleep is believed to represent more an indicator of ill-health.”He also mentioned: “ Modern society has seen a gradual reduction in the average amount of sleep people take, and this pattern is more common among full-time workers, suggesting that it may be due to social pressures for longer working hours. On the other hand, the worsening of our health is often accompanied by an extension of our sleeping time.”“Consistently sleeping six to eight hours per night may be good for health. However, whether to achieve the goal depends on various factors such as the environment as well as measures of public health aimed at favourable changes of the working environments,” Professor Francesco Cappuccio added.28.What did researchers in University of WarwickA.People who sleep fewer than 6 hours each night die before 65.B.Sleeping for more than 9 hours a night does good to one's health.C.Six to eight hours’ sleep can be appropriate for people.D.People at an old age are healthier because they sleep longer.29.What is Professor Francesco Cappuccio most likely to agree with?A.Long sleep is what causes our health problems.B.Modern people sleep less because they work longer.C.Our health becomes worse because we sleep less.D.How long we sleep depends on our education.30.What did the researcher think may help people have proper sleep?A.Social pressure.B. Longer working hours.C.Extension of sleeping time.D. Changes of working environments.31. What can be the best title for this passage?A. How Long Should We SleepB. Longer Sleep Makes Better HealthC. Time to Sleep EarlyD. The Importance of SleepDImagine a school where self-awareness is celebrated, students are encouraged to solve maths problems by writing on the walls and applying learned lessons to real life is more important than homework. These are a few of the concepts that makes Space of Mind School unique.Located in a home built in 1896 in Florida, US, the program serves students in grades 2 through 12 and will accept kindergarten students next year. It also offers an after-school program for students who attend traditional schools, as well as evening programs for adults and educators and weekend events for families.There is a different atmosphere from that of a traditional school building. Tables and brightly colored walls are white boards. In the science room, students are studying climate changes at a weather station, while in the music room, a student is solving an equation (等式) with his academic coach while he connects music theory and maths.The daily schedule at the school also stands out. “ We don’t assign boring or exhausting homework.” said Space of Mind founder and CEO Ali Kaufman. “ Instead of homework, we ask that they go home and take a video of themselves applying a lesson they learned or cooking a meal for their family that they learned how to make at school.”For lunch, instead of traditional cafeteria dishes such as pizza, the school offers organic meals made out of products from local gardens and farms. “ Our students also run a business at the Delray Beach Green Market on Saturdays so they can understand sustainable living practices and how to run a business,” Kafman said.“ We are also the first school program in Florida to start and end each day with 15 minutes of meditation (冥想),” Kaufman said. “ The positive results we have been seeing in the students from meditation are amazing. We are really about infusing social, emotional and creative skills with academic and life skills.”32.Space of Mind School_________.A.assigns no homework.B. urges students to use what they learnC.teaches students to earn money in classD. focuses on knowledge learning33. What can be inferred from the last paragraph?A. Yoga enjoys great popularity in US.B. The practice of meditation is amazing.C. The meditation session lasts 15 minutes daily.D.The students benefit from meditation.34. The underlined word “infusing" in the last paragraph probably means______.A. emphasizingB. checkingC. developingD. helping35. What is the text mainly about?A. What makes Space of Mind School outstanding.B. Why Space of Mind School is popular in US.C. How the after-class programs of space of Mind School are organized.D. How Space of Mind School cultivates students' life skills.第二节(共5小题,每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。