合江中学高三第二次月考试卷
四川省泸州市合江县中学高三化学月考试题含解析
四川省泸州市合江县中学高三化学月考试题含解析一、单选题(本大题共15个小题,每小题4分。
在每小题给出的四个选项中,只有一项符合题目要求,共60分。
)1. (08淄博调研)分类是学习和研究化学的一种常用科学方法,下列分类合理的是()A.根据反应是否有电子转移将化学反应分为氧化还原反应和非氧化还原反应B.根据是否含氧元素来确定物质是否为氧化物C.根据元素原子最外层电子数的多少将元素为金属元素和非金属元素D.根据在水溶液或熔融状态下能否导电,将化合物分为电解质和非电解参考答案:答案:AD2. 下列化学应用中不涉及氧化还原反应的是()A.向Na2CO3饱和溶液中通入CO2,有NaHCO3结晶析出B.工业上制取单质硅C.Na2O2作呼吸面具中的供氧剂D.一定条件下用硫酸铜制CuH参考答案:A略3. 在一定温度下,向饱和的烧碱溶液中放入一定量的过氧化钠粉末,充分反应后恢复到原来温度,下列说法正确的 A.溶液中Na+浓度增大,有O2放出 B.溶液pH不变,有H2放出C.溶液中Na+数目减少,有O2放出D.溶液pH增大,有O2放出参考答案:C4. 下述实验能达到预期目的的是()A略5. 下图是部分短周期元素化合价与原子序数的关系图,下列说法正确的是( )A.原子半径:Z>Y>XB.气态氢化物的稳定性:R>WC.WX3和水反应形成的化合物是离子化合物D.Y和Z两者最高价氧化物对应的水化物的碱性:Y<Z参考答案:B6. 把a、b、c、d四块金属分别用导线两两相连浸入稀硫酸中组成原电池。
若a、b 相连时a 为负极;c、d相连时电流方向由d到c;a、c相连时c极上产生大量气泡;b、d相连时b极发生氧化反应,由此判断四种金属的活动性顺序由强到弱为 ( )A.a>b>c>d B.b>d>c>a C.c>a>b>d D.a>c>d>b参考答案:D略7. 最近,美国LawreceLiremore国家实验室(LLNL)的V.Lota.C.S.Yoo和Cynn成功地在高压下将CO2转化为具有类似SiO2结构的原子晶体,下列关于CO2的原子晶体说法正确的是()A.CO2的原子晶体中存在范德华力,每1molCO2原子晶体中含有2N A键B.在一定条件下,CO2原子晶体转化为分子晶体CO2是物理变化C.熔点:金刚石>原子晶体CO2>SiO2D.在CO2的原子晶体中,每个C原子周围结合4个O原子,每个O原子与两个C原子相结合参考答案:D略8. 下列反应的离子方程式正确的是A 硫酸铜溶液与氢氧化钡溶液反应: Ba2++SO42-= BaSO4↓B 向三氯化铝溶液中加入过量氨水:Al3++3NH3·H2O = A1(OH)3↓+3NH4+C 向碳酸氢钙溶液中加入过量氢氧化钠溶液:Ca2++HCO3-+OH—= CaCO3↓+H2OD 石灰石溶于醋酸: CaCO3+2H+= Ca2++CO2↑+H2O参考答案:B 略9. 下图装置(1)为一种可充电电池的示意图,其中的离子交换膜只允许K+通过,该电池充、放电的化学方程式为。
合江中学高三第二次月考试卷
合江中学高三第二次月考试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。
AKhotyn FortressBuilt in the 13th — 14th century, it lies on the right bank of the Dniester River in Khotyn, of western Ukraine. It is also in the historical northern Bessarabia region which was split in 1940 between Ukraine and Moldova. And it is near to the Old Kam’ yan ets Castle ofKamianets-Podilskyi, which was also used as a famous defensive structure. It is convenient to book the hotels nearby it at low prices, such as Premier Club, Reikartz Kamianets-Podilsky and so on. Kamenets-Podolsk CastleIt lies in the Khmelntsky Region, Ukraine. This architectural treasure is over a thousand years old and it can be found in the catalogue of the British National Museum. Its architecture which unites best western and eastern traditions fits into the nature perfectly. The castle consists of minaret buildings, a town hall, an Orthodox church and a Polish Catholic church. Its beauty has been attracting tourists from all over the world for many years.Vorontsov PalaceIt is an historic palace lying at the foot of the Crimean Mountains near the town of Alupka in Crimea, Ukraine. It is one of the oldest and largest palaces in Crimea, and one of the most popular tourist attractions on Crimea’s southern coast. The construction of the palace began in 1830, according to a projectby English architect Edward Blore (1789 —1879) and it was supposed to be the palace for Prince Mikhail Vorontsov to spend summer.Metropolitan PalaceIt was built between the years 1864 -1882 according to the designs of the Czech architect Josef Hlávka. The Palace, whose buildings are now part of Chernivtsi University, Ukraine, was declared a UNESCO World Heritage Site in 2011.21. What can we know about Khotyn Fortress?A. It served as defence work.B. It is open to the public for free.C. It is the oldest building in Ukraine.D. It was divided into two parts in 1940.22. Which has the shortest history?A. The Kamenets-Podolsk Castle.B. The Khotyn Fortress .C. The Vorontsov Palace.D. Metropolitan Palace.23. From which is the text probably taken?A. A travel magazine.B. A architecture brochure .C. A research paper on history.D. A geography textbook .BFriday would be Samia and Salem’s wedding day! Everyone in the village was excited and was busy preparing for the happy event. The villagers were very proud of Salem as he worked long hours and cared about the people in his village. While others were enjoying the prewedding celebrations, together with the nurses, the groom was busy delivering a baby in his clinic.The bride was in her room happily arranging her hair and make-up, getting ready for the arrival of her guests. Her family and friends had excitedly prepared the henna (涂指甲花) party. Grandma and Mum were busy in the kitchen with the food they had made for the henna feast for the day before Friday. Samia’s friend Mariam was making the wedding cake. Her friend Shaikha was collecti ng the bride’s dress from the tailor. At 12 noon the henna maker arrived. Following the tradition, she started decorating the bride’s hands. There was an air of excitement in the room. Grandma started singing a traditional folk song.Suddenly, the bride felt a strange tingling (麻刺感) in her hand. It grew worse and worse. Her hand became red and swollen soon. Grandma said, “Oh dear, I think it best that you wash your hands imm ediately.” As an emergency first aider, Mariam suggested applying some cold cream o n Samia’s hand and ran off and returned with some in her hand. Neither of these worked. Mum took control and phoned Salem but in vain. Without hesitation, she took Samia to the hospital urgently with Dad and other friends. Dr Ahmed looked at her hand and said, “ You’ve had an allergic reaction to the henna. Tomorrow is your wedding. What about drawing the henna using body colors?” Everyone smiled.24. What was Salem doing the day before the wedding?A. Working with the nurses.B. Decorating the bride’s hand s.C. Preparing for the wedding cake.D. Visiting the tailor for the wedding suit.25. What event took place in the village on Thursday?A. Celebrating a wedding ceremony.B. Holding a baby’s birthday party.C. Having a feast party.D. Ordering the wedding dress.26. Why did Mariam run away when she saw what happened to Samia?A. To get some water.B. To call a first aider.C. To inform Samia’s mother.D. To fetch some cream.27. How did Samia’s mother feel facing the emergency?A. Regretful.B. Calm.C. Powerful.D. Nervous.【答案】24. A 25. C 26. D 27. BCProfessor Sun Jun, aged 93 in 2018, has devoted his life to working on China’s giant construction projects, including the Qinghai-Tibet highway, Three Gorges Dam, and the Yangtze River Tunnel. In his latest project, the Tongji University academic served as a senior adviser on the construction of the Hong Kong-Zhuhai-Macao Bridge.Under the guidance of Sun, Xu Wei, a professor in Tonji and Sun’s student, took over technical assistance for the construction o f the bridge. “Every time I saw Sun and other professors working on the bridge,I felt at ease,” said Lin Ming, the general project manager. Lin initially invited an experienced Dutch company to serve as the technical assistant for the project. The company wanted to charge US $171million. He then asked for help from Xu along with experts in Tongji University.The methods developed by Tongji University reduced theimpact of the bridge on the Chinese white dolphin, which is under first class state protection. The key challenge during the construction of the bridge was the 6.7-km underwater tunnel, the world’s longest and deepest undersea tunnel. Ding Wenqi, who was nickn amed the “ tunnel expert” , was asked to ensure the tubes be connected perfectly—even under the influences of land subsidence (下沉), water pressure and tide movement. Hu Xiangdong, another professor with T ongji, developed a method to freeze the earth around the tunnel to prevent water leakage and land subsidence during the digging of the most challenging 2-km section of the tunnel.The tunnel section of the project was completed in May 2017. Sun was invited to visit the near-completed bridge again in February 2018. The expert said he felt the most relaxed this time since most of the challenges hav e been conquered. “In the next step, we should focus on how tomake the two artificial islands more beautiful and attract travelers,” Sun said.Xu said all the staff in my office took a great pride in watching the TV news of the bridge’s official opening o n Wednesday.28. What is Professor Sun’s contribution to the bridge?A. He worked in Tongji University.B. He was the general project manager.C. He gave much advice on the project.D. He took over the technical assistance.29. Why did Lin Ming ask for help from experts in T ongji University?A. The Dutch company charged too much.B. The technical assistant had too much trouble.C. Tongji University did best in the giant projects.D. He felt relaxed to see professors working on the bridge.30. What’s the gre atest trouble in building the bridge?A. Protecting the Chinese white dolphin.B. Constructing the longest & deepest undersea tunnel.C. Controlling the water pressure.D. Preventing the tide.31. How did the expert stop water leaking in building the undersea tunnel?A. By keeping the tide moving.B. By digging deep into the sea.C. By increasing the water pressure.D. By freezing the nearby earth around the tunnel.DThe regular world presented to us by our five senses—you could call it reality 1.0—is not always the most user-friendly of places. We get lost in unfamiliar cities; we meet people whose language we don’t understand. So why not try the improved versi on: augmented reality (AR) or reality 2.0? AR technology adds computer-produced images (图像) on the real world via a mobile phone camera or special video glasses.Early forms of AR are already here. With the right downloads, smart phones can deliverinforma tion about nearby ATMs and restaurants and other points of interest. But that’s just the b eginning. A few years from now the quantity of information available will have increased hugely. You will not only see that there’s a Chinese restaurant on the next b lock, but you will be able to see the menu and read reviews of it.This is where the next revolution in computing will take place: in the interface (界面) between the real world and the informationbrought to us via the Internet. Imagine bubbles floating before your eyes, filled with cool information about anything and everything that you see in front of you.Let’s jump ahead to ten years from now. A person trying to fix their car won’t be reading a book with pictures; they will be wearing a device that projects animated 3-D computer graphics onto the equipment under repair, labeling parts and giving step-by-step guidance.The window onto the AR world can be a smart phone or special video glasses. But in ten years’ time these will have been replaced by contact lenses (隐形眼镜) with tiny LEDs, which present something at a readable distance in front of the eye. So a deaf person wearing these lenses will be able to see what people are saying.The question is, while we are all absorbed in our new augmented reality worlds, how will we be communicating with each other?32. What does the text mainly talk about?A. The next information technology revolution.B. Early forms of augmented reality technology.C. The differences between reality 1.0 and reality 2.0.D. The relationship between people living in reality 2.0.33. What does the underlined word “it” refe r to in Paragraph 2?A. The menu.B. The block.C. The revolution.D. The restaurant.34. What are tiny LEDs used to do?A. Protect people’s eyes.B. Show text and images.C. Warn users of dangers.D. Replace video glasses.35. What’s the author’s attitude towards AR technology?A. Doubtful.B. Disapproving.C. Favourable.D. Ambiguous.第三部分英语知识运用(共两节,满分45分)第一节完形填空(共20小题;每小题1.5分,满分30分)[来源:学科]阅读下面短文,从短文后各题所给的四个选项中,选出可以填入空白处的最佳选项。
高三化学第二次月考
高三化学第二次月考化 学 试 卷说明:本试卷共分两卷,第Ⅰ卷为选择题,把正确答案序号填在题后答题卡内.第Ⅱ卷为非选择题,直截了当在本卷内作答.时刻:120分钟相对原子质量:H :1 O :16 C :12 S :32 Al :27 N :14 Na :23 Si :28 Cl :35.5第Ⅰ卷(选择题共48分)一、选择题:每小题2分,24小题共48分.每小题只有一个选项正确.把正确选项的代号填在题后答题卡中.1片是。
A .负极B .正极C .阴极D .阳极 2、检验某未知溶液中时否含有SO 42-,下列操作最合理...的是 A.加入稀硝酸酸化的Ba(NO 3)2溶液B.加入盐酸酸化的BaCl 2溶液C.先加稀硝酸酸化,再加Ba(NO 3)2溶液D. 先加盐酸酸化,再加BaCl 2溶液3、下列对进行焰色反应实验操作注意事项的说明正确..的是: ①要透过兰色钴玻璃观看钾的火焰颜色 ②先把铂丝烧到与原先火焰颜色相同,再蘸取被检测的物质 ③每次实验后,要用盐酸把铂丝洗净 ④实验时最好选择本身较柔弱的火焰 ⑤没有铂丝,也能够用光洁无锈的铁丝代替A .仅有③不正确B .仅有④不正确C .仅有⑤不正确D .全对4、接触法制硫酸的接触室中有一个热交换器,关于它的作用比较确切....的说法是 A 、给催化剂加热B 、把反应时生成的热,传递给需要预热的气体,并冷却反应后生成的气体C 、为了提高温度,让热的水蒸气通过热交换器D 、为了充分利用热能,让冷水通过热交换器5.先将甲物质放于托盘天平右盘进行称量,再将乙物质放在左盘进行称量,若两次都使用了游码,且砝码和游码的读数均相等,甲、乙两物质的质量A .甲小于乙B .甲等于乙C .甲大于乙D .不能确定6.与铁相似,金属锡能溶于盐酸生成氯化亚锡,氯化亚锡又能被氯化铁氧化为氯化锡。
则下列有关微粒氧化、还原能力的比较中,正确..的是: A .氧化能力:Sn 4+<Sn 2+ B .氧化能力:Fe 3+<Sn 4+C .还原能力:Fe 2+<Sn 2+D .还原能力:Fe <Sn7.下列各组溶液,只用组内溶液互相混合的方法就可鉴别的是A .NaOH 、32CO Na 、2NaAlO 、2MgClB .42SO Na 、2BaCl 、3KNO 、NaClC .NaCl 、3AgNO 、3NaNO 、HClD .42SO Na 、32CO Na 、2BaCl 、HCl8、已知a 、b 、c 、d 、e 分别是Ca(OH)2、Ca(HCO 3)2、HCl 、Ba(NO 3)2、Na 2CO 3五种物质水溶液中的一种,它们相互反应情形如下:气体 图1—1 a b c d ec ↓ ↓ / ↑ —b ↓ / ↓ — —A. Ca(HCO 3)2与Ba(NO 3)2B. Ca(OH)2与Ba(NO 3)2C. Na 2CO 3与Ca(HCO 3)2D. HCl 与Ca(OH)29.以Al 、稀H 2SO 4和NaOH 为原料制取Al(OH)3,甲、乙、丙3个学生分别用3种不同的途径制备:甲:Al −−→−42SO H Al 2(SO 4)3−−→−NaOHAl(OH)3 乙:Al −−→−NaOH NaAlO 2−−→−42SO H Al(OH)3 丙:若要制得等量的Al(OH)3,则A.乙消耗原料最少B.三者消耗原料相同C.丙消耗的原料最少D.甲、乙消耗原料相同10.按A 图装置进行实验,若图B 的X 轴表示流入电极的电子的量,则Y 轴不可能...表示的情形是A . C(Ag +)B .C( NO 3-)C .溶液的PHD .银棒的质量11.关于某溶液中所含离子的鉴别,下列判定正确..的是 A.加入AgNO 3溶液生成白色沉淀,加稀盐酸沉淀不消逝,则一定有Cl -存在B.加入NaOH 溶液能生成白色沉淀,NaOH 过量时沉淀又消逝,则原溶液一定有AlO -C.加入NaOH 并加热有能使潮湿的红色石蕊试纸变蓝的气体生成,则原溶液一定有+4NHD.加入盐酸有能使澄清石灰水浑浊的气体生成,则原溶液一定有大量-23CO 12.纯碱和小苏打是厨房中两种常见的用品,它们差不多上白色固体。
高三第二次月考物理试题.doc
高三第二次月考物理试题 时间:120分钟 总分:150分一、本题共10个小题,每小题4分,共40 分,在每小题目给出的四个选项中,有的只有一项正确,有的小题有多项正确。
全部选对的得4分,选不全的得2分,有选错的或不答的得零分。
1、如图所示,物体A 、B 和C 叠放在水平桌面上,水平力为F b = 5N ,F c = 10N ,分别作用于物体B 、C 上,A 、B 和C 仍保持静止。
以1f F 、2f F 、3f F 分别表示A 与B ,B 与C ,C 与桌面间的静摩擦力的大小,则 ( ) A 、1f F = 5N ,2f F = 0N , 3f F = 5NB 、1f F = 5N ,2f F = 5N , 3f F = 0NC 、1f F = 0N ,2f F = 5N , 3f F = 5ND 、1f F = 0N ,2f F = 10N , 3f F = 5N2、如图甲中一水平轻杆在右端的P 点系有两根细线,一根斜上拉且固定,另一根竖直向下连接质量为m 的物体而处于平衡,图乙中水平轻杆右端固定,左端连接一个光滑滑轮,用细线绕过滑轮,上端固定而下端连接与甲同样的物体处于平衡。
下列说法中正确的是:( )A 、甲、乙图中斜拉线受到的拉力大小相等B 、甲、乙图中斜拉线受到的拉力大小不相等C 、甲图中轻杆对P 点的作用力与乙图中 轻杆对滑轮的作用力大小相等D 、甲图中轻杆对P 点的作用力与乙图中轻杆对滑轮的作用力大小不相等3、设想能创造一理想的没有摩擦力的环境,用一个人的力量去推一万吨巨轮,则从理论上可以说( )A 、 巨轮惯性太大,所以完全无法拖动B 、 一旦施力于巨轮,巨轮立即产生一个加速度C 、 由于巨轮惯性很大,施力于巨轮后,要经过很长一段时间后才会产生一个明显的加速度D 、 由于巨轮惯性很大,施力于巨轮后,要经过很长一段时间后才会产生一个明显的速度 4、一汽车在水平面上做匀变速直线刹车运动,其位移与时间的关系是:s=24t -6t 2,则它在3s 内的行驶的路程等于:( )A 、 18mB 、 24mC 、 30mD 、48m 5、如图所示,A 、B 两物体叠放在一起沿倾角为θ的斜面加速下滑,并保持相对静止,已知它们的质量分别为m A 和m B ,A 与B 之间、B 与斜面之间的动摩擦因数分别为μ1和μ2,则A 、B 之间的摩擦力大小为( )A 、0B 、μ1m A g cos θC 、μ2m A g cos θD 、m A g sin θmm6、如图所示,两木块的质量分别为m 1和m 2,两轻质弹簧的劲度系数分别为k 1和k 2,上面木块压在上面的弹簧上(但不拴接),整个系统处于平衡状态。
高三第二次月考语文卷.doc
高三第二次月考语文卷一、(12分,每小题3分)1.下列词语中没有错别字的一组是A.恢谐蓬松寥若晨星盛名之下,其实难副B.震惊神洲唇枪舌剑欲加之罪,何患无辞C.座谈抱歉杀身成仁道高一尺,魔高一丈D.发轫华诞色利内荏螳螂捕蝉,黄雀在后2.下列各句中,加点的成语使用恰当的一项是A.电视连续剧《石破天惊》播出后,在社会上引起很大的反响,人们对之评头论足....,大加赞赏。
B.像《变形记》这样在内容与表达方面不可理喻....的作品,一般的读者往往对其敬而远之。
C.美国欲用一箭双雕....的手段解决伊朗核问题:既能推翻伊朗现政权,又能进一步控制中东石油。
D.2006年春节晚会终于伴着新春的钟声销声匿迹....了,对于这台晚会,我们首先是祝福与鼓励。
3.下列各句中,没有..语病的一句是A.国际奥委会提出了“严禁使用类兴奋剂类药物,坚决打击隐瞒实际年龄现象”,要求各国奥委会带头执行,严格遵守。
B.2006年7月29日至8月4日,51名农业科技专家和农村实用人才,受党中央、国务院邀请,来到北戴河休闲度假。
C.日前,安南呼吁各国政府及社会组织重视日益泛滥的国际恐怖主义活动,停止至今还在各地愈演愈烈的制造自杀性爆炸事件的恶劣风气。
D.2006年上半年,深圳每平方公里土地GDP产出1.31亿元,比去年同期增加13个百分点,靠的是政府和企业大幅度的科技投入取得的。
4.将下面打乱了语序的六个句子组成一段语意连贯的文字,顺序正确的一项是①其中包括生存权、自由权和追求幸福的权利②人人生而平等③为了保障这些权利,人类才在他们中间建立政府④造物主赋予他们若干不可让与的权利⑤而政府的正当权利,则是经被统治者同意所授予的⑥我们认为下述真理是不言而喻的A.①⑥④③⑤②B.⑥④③⑤②①C.⑥③②④①⑤ D.⑥②④①③⑤二、(9分,每小题3分)阅读下面的文字,完成5—7题。
人类聪明是否已到极限?王国荣近十几年来,由于当代科学技术的突飞猛进,人类一年创造的财富是20世纪初的19倍。
高三年级化学上册第二次月考试题.doc
高三年级化学上册第二次月考试题化学试题本试卷分Ⅰ、Ⅱ两卷,分别为选择题和非选择题。
共120分,考试时间100分钟。
可能用到的相对原子质量:H 1 C 12 N 14 O 16 Na 23 Mg 24 A1 27 Si 28S 32 C1 35.5 K 39 Ca 40 Cu 64 Br 80 I 127第Ⅰ卷(选择题共56分)一、单项选择题:本题包括8小题,每小题3分,共计24分。
每小题只有一个选项符合题意。
1.下列各组物质的分类都正确的是(括号里的是类别)A.NaCl溶液(混合物)、HNO3(离子化合物)、CO2(非电解质)B.液氨(氢化物)、NH4NO3(铵盐)、BaSO4(强电解质)C.HCl(共价化合物)、CH3COOH(羧酸)、KO2(碱性氧化物)D.NO2(酸性氧化物)、CH3CHO(有机物)、CO2(有机物)2.下列描述中,符合化学科学的是A、“曾青得铁则化为铜”中的“曾青”是指硝酸铜B、“冰,水为之,而寒于水”说明相同质量的水和冰,水的能量高C、“玉不琢不成器”、“百炼方能成钢”的说法都与物质的化学变化无关D、“春蚕到死丝方尽,蜡炬成灰泪始干”中的“丝”和“泪”分别是指纤维素和油脂3.运用化学知识可以解决日常生活中遇到的许多问题,下列说法不正确...的是A.食用松花蛋时蘸些食醋可以去除氨味B.用双氧水的稀溶液清洗伤口可以杀菌消毒C.用淀粉溶液检验食盐是否为加碘盐D.用稀硝酸回收利用破碎热水瓶胆内的银4.物质氧化性、还原性的强弱,不仅与物质的结构有关,还与物质的浓度和反应温度有关。
下列各组物质:①Cu与HNO3溶液②Cu与FeCl3溶液③Zn与H2SO4溶液④Fe与HCl溶液由于浓度不同而能发生不同氧化还原反应的是A.①③ B.③④ C.①② D.①③④5.下列各项中表达不正确...的是A.Si的原子结构示意图:B.NH3的电子式:C.聚乙烯的结构简式:nD.29Cu的核外电子排布式:【Ar】3d104s16.下列观点中不正确...的是A.通过化学变化一定能改变物质的性质B.改变物质的性质一定要通过化学变化C.氧化还原反应中一定会发生电子转移D.有电子转移的化学反应一定是氧化还原反应7.今有0.1 mol·L-1 Na2SO4溶液300 mL,0.1 mol·L-1 MgSO4溶液200 mL和0.1 mol·L-1 Al2(SO4)3溶液100 mL,这三种溶液中硫酸根离子浓度之比是A.1∶1∶1 B.3∶2∶1C.3∶2∶3 D.1∶1∶38.具有下列电子排布式的原子中,半径最大的是A.ls22s22p63s23p5 B.1s22s22p3C.1s22s22p2 D.1s22s22p63s23p4二、不定项选择题:本题包括8小题,每小题4分,共计32分。
合江中学第二次月考物理试卷.doc
18.77 cm B. 18. 76 cm 如果一个用杆秤卖水果的奸商, 换重些的秤艳 给秤杆上重新刻上刻度 关于摩擦力的说法中正确的是 摩擦力对我们总是有害的 C. 18. 74 cm D. 18. 89 cm 他要坑害消费者,常用的方法是( B 、把秤石它丽i 掉一块 D 、拒挂钩的彳立置换换 ( ) 目前的技术条件下,我们还不能消除摩擦 减小摩擦的一个很好的方法就是变滚动为滑动 摩擦力的方向与物体的运动方向相反 如图所示的工具中属于省力的杠杆的是() A.10.A、C、11. 合江中学初三中考物理试卷班次 姓名 一、选择题(15X2分=30分)题号 1 2 3 4 5 6 7 8 9 111111答案1. 下列微粒按从小到大的顺序排列正确的是()A. 分孕、夸电、质子、电孕 B,分子、原子、电子、原子核C.原子核、电子、员子、分字 D,分子、廉字核、员子、夸电2. 在你答卷的过程中,对于笔中的墨水来说叙说正确的是()A.质量不变,密度不变B.质量不变,质量减小C.质量减小,密度不变D.质量减小,质量减,、3. 重力约为1牛的物体可能是()A. 一支铅笔B. 一包方便面C. 一台电脑D. 一张桌子4. 用铜、铝、铁制成的三个质量相等的空心球,比较它们的总体积,则()A.辛同&勺最大B.铁的最大C.铝的最大D.羌法判定5. 若在4个相同的烧杯中分别装满酒精、水、盐水和水银则烧杯底部受到液体压强 最大帝是( )A 酒精B 水C 盐水D 水银6. 托盘天平横梁上都有标尺和游码,向右移动游码的作用是()A.相当与相左调节平衡螺母B.可代替指针用来指示平衡C.相当于在左盘中加小磋码D.相当于在右盘中加小磋码7. 诗人曾写下这样的诗句:“人在桥上走,桥流水不流”。
其中“桥流水不流”,诗人 选择的参照物是()A.桥B.河岸C.水D.岸上的树8. 足球运动员把足球踢向空中,若不计空气阻力,则下列表示足球在空中飞行的受力 图中,正确的是(G 表示重力,F 表示脚对球的作用力)()9.章天同学用一把刻度尺4次测量物理课本的宽度,下列记录数据中错误的是(13.下列不是由弹力产生的是() A.撑竿跳高运动员飞越横杆B.装有弹簧的的门被推开,放手后自动关上C.玩具手枪将“子弹”射出去D.手中的石头释放后回下落14.小明同学只能提起重400N的物体,现在为了提起1000N的重物,他设计了个滑轮组,如要束最简单,他应选择()A. 1个定滑轮B. 1个定滑轮和1个动滑轮C. 1个定滑轮和2个动滑轮D. 2个定滑轮和2个动滑轮15.一个物体受到平衡力的作用,在光滑水平面上做匀速直线运动,若平衡力突然消失,则物依将()A.立即停止运动B.运动速度越来越快C.运动减慢,最后停止D.仍做匀速直线运动二、填空题(每空2分,共20分)16.Im3冰熔化成水,则水的质量是 kg,水所受到的重力是 No(P冰=0.9X3)103kg/m17.用天平测物体的质量时,向右盘中添加磋码,应当按的顺序(选填“质量由小到大”或“质量由大到小”),在调换磋码发现,如果添加最小的磋码又嫌少,这时应采取的方法使天平恢复平衡。
高三第二次月考试卷
一.选择题(每题5分,共60分。
请把正确的答案填写在上面表中)1、集合{}R x x x A x ∈=--=,012|2的所有子集个数为( ) A 、4 B 、3 C 、2 D 、12、若一个命题的否命题是真命题,则其逆命题( )A 、 不一定是真命题B 、一定是真命题C 、一定是假命题D 、不一定是假命题3、一个容量为n 的样本,分成若干组,已知某组的频数和频率分别是40,0.125,则n 为( )A 、640B 、320C 、240D 、1604、函数13)(3+-=x x f x 在闭区间[—3,0]上的最大值、最小值分别是A 、1,1B 、1,-17C 、3,-17D 、9,-195、“b a >”是“ba 11<”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6、已知函数==--++=)2(,10)2(8)(35f f qx p x f x x 则满足 A 、10 B 、—10 C 、—26 D 、—187、函数)1(22-<+=x x y x 的反函数是A 、11-+=x y )1(-<xB 、11-+=x y )1(->xC 、11-+-=x y )1(-<xD 、11-+-=x y )1(->x8、函数 x x y 22)31(-= 的值域是 A 、]0,3[- B 、]3,0(C 、]3,(-∞D 、),∞+3[ 9、函数)32(log 22-+=x x y 的单调减区间是A 、)3,(--∞B 、)1,(--∞C 、),1(+∞-D 、),∞+1(10、将函数)1(log 2+=x y 的图象A 、先向左平移1个单位B 、先向右平移1个单位C 、先向上平移1个单位D 、先向下平移1个单位再作关于直线的图象对称的图象,可得2xy x y ==。
11、如果不等式123->a ax 对任意]1,1[-∈x 总成立,则a 的取值范围是 A 、511<<-a B 、51>a C 、151-<>a a 或 D 、1-<a 12、已知)(x f 是定义在R 上的增函数,其图象经过点A (0,-1)和点B (3,1)则不等式1)(<x f 的解集是A 、)0,(-∞B 、)3(∞+,C 、)3,0(D 、),∞+⋃-∞3[)0,( 二、填空题。
2021年湖南省衡阳市常宁市合江中学高三生物月考试题含解析
2021年湖南省衡阳市常宁市合江中学高三生物月考试题含解析一、选择题(本题共40小题,每小题1.5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. 有三个盛放葡萄糖溶液的密封玻璃瓶,已知一瓶混有酵母菌,一瓶混有乳酸菌,一瓶只有葡萄糖溶液。
下列叙述正确的是()A、有气泡的瓶子肯定混有酵母菌B、发热的瓶子肯定混有乳酸菌C、只盛放葡萄糖液的瓶子能量会增加D、混有乳酸菌的瓶子物质种类会减少参考答案:A2. 某学校兴趣小组利用图1实验装置进行实验。
图1中a、b、c、d 4个装置中的叶片是取自同一植物,且它们的形态、大小、生长状况都相同;大烧杯中的液体可以保证叶片所需的水与无机盐的正常供应;通过观察油滴的运动可判断气体的变化情况(不考虑气体在水中的溶解与外界气压的变化和蒸腾作用的影响)。
图2是叶肉细胞在不同光照强度下叶绿体与线粒体代谢简图,下列叙述中正确的是()A.实验开始的一段时间内,图1中装置b、d中油滴都会向右移动,此时叶肉细胞的状态为图2中的②B.可以利用装置b、c证明CO2是光合作用的必要条件C.给植株增施氮肥后,在较强光照条件下,图1装置c中叶肉细胞的状态为图2中的③,所利用的CO2量为N1与N2的差D.在较弱光照条件下,图1装置c中叶肉细胞的状态为图2中的④,此时,N1小于m2参考答案:B3. 细胞内很多化学反应都是在生物膜上进行的,下图表示真核细胞中4种生物膜上发生的化学变化示意图,相关叙述不正确的是A.①是内质网膜 B.②是高尔基体膜 C.③是叶绿体内膜 D.④是线粒体内膜参考答案:C4. 蛋白质在生物体内具有重要作用。
下列叙述错误的是()A. 浆细胞产生的抗体可结合相应的病毒抗原B. 肌细胞中的某些蛋白质参与肌肉收缩的过程C. 蛋白质结合Mg2+形成的血红蛋白参与 O2运输D. 细胞核中某些蛋白质是染色体的重要组成成分参考答案:C【分析】蛋白质的功能-生命活动的主要承担者:①构成细胞和生物体的重要物质,即结构蛋白,如羽毛、头发、蛛丝、肌动蛋白;②催化作用:如绝大多数酶;③传递信息,即调节作用:如胰岛素、生长激素;④免疫作用:如免疫球蛋白(抗体);⑤运输作用:如红细胞中的血红蛋白。
四川省泸州市合江县自怀镇中学2020年高三物理月考试题含解析
四川省泸州市合江县自怀镇中学2020年高三物理月考试题含解析一、选择题:本题共5小题,每小题3分,共计15分.每小题只有一个选项符合题意1. (单选题)如图所示,开关S原来是闭合的,当R1、R2的滑片刚好处于各自的中点位置时,悬在空气平行板电容器C两水平极板间的带电尘埃P恰好处于静止状态.下列说法正确的是()A.把R1的滑片向左移动,尘埃P将向下运动B.把R2的滑片向右移动,尘埃P将向上运动C.把R1的滑片向左移动的过程中,电流计中有向右的电流D.把R2的滑片向左移动的过程中,电流计中无电流参考答案:B2. 据报道,我国将于今年发射神舟10号载人飞船与天宫一号目标飞行器对接,届时天宫一号将下调飞行高度迎接神舟10号载人飞船以实现顺利对接。
如图所示,天宫一号调整前后做圆周运动距离地面的高度分别为h1和h2(设地球半径为,忽略地球自转的影响),则天宫一号调整前后A.线速度大小之比为B. 所受地球引力大小之比C.向心加速度大小之比D. 周期之比为参考答案:D由万有引力提供向心力可得,解得线速度,向心加速度,周期,综上可得天宫一号调整前后线速度大小之比为,所受地球引力大小之比为,向心加速度大小之比,周期之比为,只有选项D正确。
3. 如图所示的速度—时间和位移—时间图像中给出了四条图线,关于它们的物理意义,下列描述正确的是A.图线1表示物体做曲线运动B.s—t图线中t1时刻v1>v2C.v—t图线中0至t3时间内3和4平均速度相等D.s—t图线中t2时刻表示2开始反向运动参考答案:BD4. 下列四幅图的有关说法中,正确的是A.若两球质量相等,碰后m2的速度一定为vB.射线甲是粒子流,具有很强的电离能力C.在光频率保持不变的情况下,入射光越强,饱和光电流越大D.链式反应过程中生成的中子也就是原入射的中子参考答案:CA、根据动量守恒定律,则有:当两球质量相等,弹性碰撞后,m2的速度一定为v,故A错误;B 、根据三种射线的组成,射线丙由α粒子组成,该粒子带两个单位正电荷,而射线甲是β粒子,结合左手定则可知,射线丙是α粒子流,具有较强的电离能力,而射线甲是电子流,故B 错误;C 、光电效应实验中,光频率保持不变的情况下,入射光越强,饱和光电流越大,故C 正确;D 、链式反应过程中生成的中子的速度与反应前的中子速度不同,故D 错误。
2021-2022学年重庆合江中学高三物理月考试题含解析
2021-2022学年重庆合江中学高三物理月考试题含解析一、选择题:本题共5小题,每小题3分,共计15分.每小题只有一个选项符合题意1. (单选)2013年12月14日21时许,嫦娥三号携带“玉兔”探测车在月球虹湾成功软着陆,在实施软着陆过程中,嫦娥三号离月球表面4m高时最后一次悬停,确认着陆点。
若总质量为M的嫦娥三号在最后一次悬停时,反推力发动机对其提供的反推力为F,已知引力常量为G,月球半径为R,则月球的质量为()A.B.C.D.参考答案:A2. 由红、绿两单色光组成的光束以入射角θ由空气射到半圆形玻璃砖表面的A处,AD是半圆的直径。
进入玻璃后分为两束,分别为AB、AC,它们从A到B和从A到C的时间分别为t1和t2 ,则()A.AB是红光,t1 = t2B.AC是红光,t1 = t2C.AB是绿光,t1 < t2D.AC是绿光,t1 > t2参考答案:B3. (单选)如图所示,N为钨板,M为金属网,它们分别和电池两极相连,各电池的极性和电动势在图中标出.钨的逸出功为4.5eV.现分别用能量不同的光子照射钨板(各光子的能量在图上标出).那么,下列图中有光电子到达金属网的是()使滑动变阻器的滑片由右端向左端滑动,在此过程中()A.小灯泡L1、L2均变暗B.小灯泡L1变暗,L2变亮C.电流表A的读数变小,电压表V的读数变大D.电压表V的读数变化量与电流表A的读数变化量比值不变参考答案:BD【考点】闭合电路的欧姆定律.【分析】首先认识电路的结构:变阻器与灯泡L1并联,再与灯泡L2串联.V表测量路端电压,A表测量干路电流.将滑动变阻器的触片由右端向左滑动时,变阻器接入电路的电阻变小,根据欧姆定律分析两电表读数的变化.【解答】解:C、分析电路图可知,和滑动变阻器并联后再与串联,当滑动变阻器连入电路部分的阻值变小后,整个电路的电流变大,外电压减小,故电流表读数增大,电压表读数减小,故C错误;AB、流过的电流变大,加在两端的电压减小,故变暗,而变亮,故A错误,B正确;D、由U=E﹣Ir可得,,故D正确;故选:BD5. (单选)如图2所示,实线为不知方向的三条电场线,从电场中M点以相同速度飞出a、b两个带电粒子,运动轨迹如图中虚线所示.则()A.A一定带正电,b一定带负电B.A的速度将减小,b的速度将增加C.A的加速度将减小,b的加速度将增加D.两个粒子的电势能一个增加一个减小参考答案:C二、填空题:本题共8小题,每小题2分,共计16分6. 物理小组在一次探究活动中测量滑块与木板之间的动摩擦因数。
合江县高三月考数学试卷
一、选择题(本大题共10小题,每小题5分,共50分)1. 已知函数f(x) = x^3 - 3x + 1,则f(x)的对称中心为()A. (0, -1)B. (0, 1)C. (1, 0)D. (1, -1)2. 在三角形ABC中,AB=AC,∠BAC=60°,则sin∠ABC的值为()A. 1/2B. √3/2C. 1D. √33. 已知等差数列{an}的首项a1=3,公差d=2,则第10项an的值为()A. 19B. 21C. 23D. 254. 设复数z满足|z-1|=|z+i|,则复数z的实部为()A. 0B. 1C. -1D. 不存在5. 已知函数f(x) = log2(x+1) + log2(x-1),则f(x)的定义域为()A. (0, 1)B. (1, 2)C. (1, +∞)D. (-∞, -1)∪(1, +∞)6. 在平面直角坐标系中,点P(2, 3)关于直线y=x的对称点为()A. (2, 3)B. (3, 2)C. (-2, -3)D. (-3, -2)7. 已知函数f(x) = x^2 - 4x + 3,则f(x)的图像与x轴的交点为()A. (1, 0)B. (2, 0)C. (1, 3)D. (2, 3)8. 已知等比数列{bn}的首项b1=4,公比q=2,则第n项bn的值为()A. 2^nB. 4^nC. 2^(n+1)D. 4^(n+1)9. 在三角形ABC中,AB=AC,∠BAC=120°,则cos∠ABC的值为()A. 1/2B. √3/2C. -1/2D. -√3/210. 已知函数f(x) = |x| + 1,则f(x)的图像为()A. V型B. W型C. N型D. S型二、填空题(本大题共10小题,每小题5分,共50分)11. 已知等差数列{an}的首项a1=2,公差d=3,则第n项an的表达式为______。
12. 已知函数f(x) = x^2 - 4x + 3,则f(x)的对称轴为______。
2022年湖南省衡阳市常宁市合江中学高三物理月考试卷带解析
2022年湖南省衡阳市常宁市合江中学高三物理月考试卷含解析一、选择题:本题共5小题,每小题3分,共计15分.每小题只有一个选项符合题意1. 质量为m的物体,从距地面h高处由静止开始以加速度a=g竖直下落到地面,在此过程中A.物体的重力势能减少mgh B.物体的动能增加mghC.物体的机械能减少mgh D.物体的机械能保持不变参考答案:AB2. (多选)如图所示,发射地球同步卫星时,先将卫星发射至近地圆轨1然后经点火,使其沿椭圆轨道2运行,最后再次点火,将卫星送入同步圆轨道3,轨道1和2相切于Q点,轨道2和3相切于P 点,设卫星在1轨道和3轨道正常运行的速度和加速度分别为v1、v3和a1、a3,在2轨道经过P点时的速度和加速度为v2和a2,且当卫星分别在1、2、3轨道上正常运行时周期分别为T1 、T2 、T3,以下说法正确的是( )A.v1 > v3> v2 B.v1> v2 > v3C.a1 > a2 > a3 D.T1 < T2 < T3参考答案:AD3. A、B两辆火车在能见度很低的雾天里在同一轨道同向行驶,A车在前,速度v A=10m/s,B车在后,速度v B=30m/s.当B车发现A车时就立刻刹车,则能见度至少达到多少米时才能保证两辆火车不相撞?已知B车在进行火车刹车测试时发现,若车以30m/s的速度行驶时,刹车后至少要前进1800m才能停下()A. 400mB. 600mC. 800mD. 1600m参考答案:C 【详解】由运动学公式:得:所以B车刹车的最大加速度为当B车速度减小到时,二者相距最近,设此时B车位移为,A车的位移为,,解得:能见度,故C正确。
4. 某同学利用如图实验装置研究摆球的运动情况,摆球由A点由静止释放,经过最低点C到达与A 等高的B点,D、E、F是OC连线上的点,OE=ED,DF=FC,OC连线上各点均可钉细钉子.每次均将摆球从A点由静止释放,不计绳与钉子碰撞时机械能的损失,不计空气阻力.下列说法正确的是()A.若只在F点以下某点钉钉子,摆球可能做完整的圆周运动B.若只在F点钉钉子,摆球最高可能摆到D点C.若只在D点钉钉子,摆球最高只能摆到AB连线以下的某点D.若只在E点钉钉子,摆球最高可能摆到AB连线以上的某点参考答案:A考点:简谐运动的回复力和能量.分析:小球的摆动过程中机械能守恒;绳碰到钉子后,根据悬点位置的改变可确定小球摆动的最高点;分析小球能否做圆周运动.解答:解:A、若在F点以下某点钉钉子,则小球半径很小,只要小球到达最高点时,重力小于小球转动需要的向心力,则小球可以做完整的圆周运动,故A正确;B、若在F点放钉子,则根据机械能守恒小球应该摆到D点,但由于小球在竖直面内做圆周运动,由竖直面内圆周运动的临界条件可知,到达D点时速度为零,则说明小球达不到D点即已下落;故B 错误;C、若钉子在D点及以上,则由机械能守恒定律可知,小球最高只能摆到AB连线上的某点;故C错误;D、若只在E点钉钉子,根据能量守恒定律,摆球最高只能摆到AB连线上的某点;则D错误;故选:A.点评:本题为圆周运动与机械能守恒结合的题目,要注意分析根据机械能守恒的条件进行分析,同时注意应用临界面内圆周运动的临界值的应用.5. (单选)有关磁通量的论述,下列说法正确的是(A)在同等条件下,线圈的匝数越多,穿过线圈的磁通量就越大(B)磁感强度越大的位置,线圈面积越大,则穿过线圈的磁通量越大(C)若穿过线圈的磁通量为零,则该处磁感强度一定为零(D)匀强磁场中,穿过线圈的磁感线条数越多,则磁通量就越大参考答案:D二、填空题:本题共8小题,每小题2分,共计16分6. (4分)在阳光照射下,充满雾气的瀑布上方常常会出现美丽的彩虹。
2021-2022学年四川省泸州市合江县甘雨镇中学高三数学理月考试卷含解析
2021-2022学年四川省泸州市合江县甘雨镇中学高三数学理月考试卷含解析一、选择题:本大题共10小题,每小题5分,共50分。
在每小题给出的四个选项中,只有是一个符合题目要求的1. 设复数=1+i,则=()A.B.C.D.参考答案:A【考点】复数代数形式的乘除运算.【分析】把已知等式变形,然后利用复数代数形式的乘除运算化简求得z,则可求.【解答】解:∵=1+i,∴,则.故选:A.2. 若复数z=,则=()A.1 B.-1 C.i D.-i参考答案:C3. 若集合B={x|x≥0},且A∩B=A,则集合A可能是()A.{1,2} B.{x|x≤1}C.{﹣1,0,1} D.R参考答案:A【考点】子集与真子集.【分析】集合B={x|x≥0},且A∩B=A,则故A?B,进而可得答案.【解答】解:∵集合B={x|x≥0},且A∩B=A,故A?B,故A答案中{1,2}满足要求,故选:A4. 设,则()A.B.C.D.参考答案:B5. 函数的图像如下图,则( )A.B.C. D.参考答案:D6. 已知是周期为2的奇函数,当时,设则(A)(B)(C)(D)参考答案:答案:D解析:已知是周期为2的奇函数,当时,设,,<0,∴,选D.7. 点P从(1,0)出发,沿单位圆逆时针方向运动弧长达到Q点,则Q的坐标为A. B. C. D.参考答案:【知识点】角的概念及任意角的三角函数C1【答案解析】A 点P从(1,0)出发,沿单位圆逆时针方向运动弧长到达Q点,所以∠QOx= ,所以Q(cos ,sin ),所以Q(- ,).故选A.【思路点拨】由题意推出∠QOx角的大小,然后求出Q点的坐标.8. 在空间给出下面四个命题(其中、为不同的两条直线,、为不同的两个平面)①,//②//,////③//,,//④,//,//,//,////其中正确的命题个数有A.1个 B.2个 C.3个 D.4个参考答案:C9. 已知等比数列{a n}的各项都为正数,且a3,a5,a4成等差数列,则的值是()A.B.C.D.参考答案:A【分析】设等比数列{a n}的公比为q,且q>0,由题意和等差中项的性质列出方程,由等比数列的通项公式化简后求出q,由等比数列的通项公式化简所求的式子,化简后即可求值.【解答】解:设等比数列{a n}的公比为q,且q>0,∵a3,成等差数列,∴,则,化简得,q2﹣q﹣1=0,解得q=,则q=,∴====,故选A.【点评】本题考查等比数列的通项公式,以及等差中项的性质的应用,属于基础题.10. 如图,在正方体ABCD﹣A1B1C1D1中,M、E是AB的三等分点,G、N是CD的三等分点,F、H分别是BC、MN的中点,则四棱锥A1﹣EFGH的左视图是()A.B.C.D.参考答案:C【考点】L7:简单空间图形的三视图.【分析】确定5个顶点在面DCC1D1上的投影,即可得出结论.【解答】解:A1在面DCC1D1上的投影为点D1,E在面DCC1D1的投影为点G,F在面DCC1D1上的投影为点C,H在面DCC1D1上的投影为点N,因此侧视图为选项C的图形.故选C二、填空题:本大题共7小题,每小题4分,共28分11. 甲、乙、丙、丁四人参加某运动会射击项目选拔赛,四人的平均成绩和方差如下表所示:从这四个人中选择一人参加该运动会射击项目比赛,最佳人选是.参考答案:丙考点:极差、方差与标准差;众数、中位数、平均数.专题:应用题;概率与统计.分析:根据平均数表示成绩的高低,方差表示成绩的稳定性,进行比较即可得出结论.解答:解:∵甲、乙、丙、丁四人的平均环数乙和丙均为8.8环,最大,甲、乙、丙、丁四人的射击环数的方差中丙最小,∴丙的射击水平最高且成绩最稳定,∴从这四个人中选择一人参加该运动会射击项目比赛,最佳人选是丙.故答案为:丙.点评:本题考查了利用平均数与方差表示一组数据的数字特征的应用问题,是基础题目.12. 设D、E、F分别是△ABC的三边BC、CA、AB上的点,且,若,则______________. 参考答案:13. 若“a、b都是偶数,则a+b 是偶数”的逆否命题是若.参考答案:a+b 不是偶数,则a 、b不都是偶数考点:四种命题.专题:规律型.分析:根据逆否命题的定义即可得到结论.解答:解:根据逆否命题的定义可知,“a、b都是偶数,则a+b是偶数”的逆否命题是:若a+b不是偶数,则a、b不都是偶数.故答案为:若a+b不是偶数,则a、b不都是偶数.点评:本题主要考查四种命题之间的关系和定义,比较基础.14. 已知中,,,点为线段上的动点,动点满足,则的最小值等于▲.参考答案:15. 设直线与双曲线的两条渐近线分别交于、,若满足,则双曲线的离心率是.参考答案:16. 如图,当甲船位于A处时获悉,在其正东方向相距10海里的B处有个艘渔船遇险等待营救,甲船立即前往营救,同时把消息告知在甲船的南偏西30°,相距6海里的C处的乙船,乙船立即朝北偏东(θ+30°)的方向沿直线前往B处营救,则sinθ的值为.参考答案:【考点】解三角形的实际应用.【分析】连结BC,先用余弦定理计算BC,再利用正弦定理计算sinC即可.【解答】解:连结BC,由已知得AC=6,AB=10,∠BAC=120°,由余弦定理得BC2=AB2+AC2﹣2?AB?AC?cos120°=100+36﹣2?10?6?(﹣)=196,∴BC=14,由正弦定理得,即,解得sinC=,∴sinθ=.故答案为:.17. 函数的图像,其部分图象如图所示,则_______.参考答案:略三、解答题:本大题共5小题,共72分。
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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。
AKhotyn FortressBuilt in the 13th — 14th century, it lies on the right bank of the Dniester River in Khotyn, of western Ukraine. It is also in the historical northern Bessarabia region which was split in 1940 between Ukraine and Moldova. And it is near to the Old Kam’ yan ets Castle ofKamianets-Podilskyi, which was also used as a famous defensive structure. It is convenient to book the hotels nearby it at low prices, such as Premier Club, Reikartz Kamianets-Podilsky and so on. Kamenets-Podolsk CastleIt lies in the Khmelntsky Region, Ukraine. This architectural treasure is over a thousand years old and it can be found in the catalogue of the British National Museum. Its architecture which unites best western and eastern traditions fits into the nature perfectly. The castle consists of minaret buildings, a town hall, an Orthodox church and a Polish Catholic church. Its beauty has been attracting tourists from all over the world for many years.Vorontsov PalaceIt is an historic palace lying at the foot of the Crimean Mountains near the town of Alupka in Crimea, Ukraine. It is one of the oldest and largest palaces in Crimea, and one of the most popular tourist attractions on Crimea’s southern coast. The construction of the palace began in 1830, according to a project by English architect Edward Blore (1789 — 1879) and it was supposed to be the palace for Prince Mikhail Vorontsov to spend summer.Metropolitan PalaceIt was built between the years 1864 -1882 according to the designs of the Czech architect Josef Hlávka. The Palace, whose buildings are now part of Chernivtsi University, Ukraine, was declared a UNESCO World Heritage Site in 2011.21. What can we know about Khotyn Fortress?A. It served as defence work.B. It is open to the public for free.C. It is the oldest building in Ukraine.D. It was divided into two parts in 1940.22. Which has the shortest history?A. The Kamenets-Podolsk Castle.B. The Khotyn Fortress .C. The Vorontsov Palace.D. Metropolitan Palace.23. From which is the text probably taken?A. A travel magazine.B. A architecture brochure .C. A research paper on history.D. A geography textbook .BFriday would be Samia and Salem’s wedding day! Everyone in the village was excited and was busy preparing for the happy event. The villagers were very proud of Salem as he worked long hours and cared about the people in his village. While others were enjoying the prewedding celebrations, together with the nurses, the groom was busy delivering a baby in his clinic.The bride was in her room happily arranging her hair and make-up, getting ready for the arrival of her guests. Her family and friends had excitedly prepared the henna (涂指甲花) party. Grandma and Mum were busy in the kitchen with the food they had made for the henna feast for the day before Friday. Samia’s friend Mariam was making the wedding cake. Her friend Shaikha was collecting the bride’s dress from the tailor. At 12 noon the henna maker arrived. Following the tradition, she started decorating the bride’s hands. There was an air of excitement in the room. Grandma started singing a traditional folk song.Suddenly, the bride felt a strange tingling (麻刺感) in her hand. It grew worse and worse. Her hand became red and swollen soon. Grandma said, “Oh dear, I think it best that you wash your hands imm ediately.” As an emergency first aider, Mariam suggested applying some cold cream on Samia’s hand and ran off and returned with some in her hand. Neither of these worked. Mum took control and phoned Salem but in vain. Without hesitation, she took Samia to the hospital urgently with Dad and other friends. Dr Ahmed looked at her hand and said, “ You’ve had an allergic reaction to the henna. Tomorrow is your wedding. What about drawing the henna using body colors?” Everyone smiled.24. What was Salem doing the day before the wedding?A. Working with the nurses.B. Decorating the bride’s hands.C. Preparing for the wedding cake.D. Visiting the tailor for the wedding suit.25. What event took place in the village on Thursday?A. Celebrating a wedding ceremony.B. Holding a baby’s birthday party.C. Having a feast party.D. Ordering the wedding dress.26. Why did Mariam run away when she saw what happened to Samia?A. To get some water.B. To call a first aider.C. To inform Samia’s mother.D. To fetch some cream.27. How did Samia’s mother feel facing the emergency?A. Regretful.B. Calm.C. Powerful.D. Nervous.【答案】24. A 25. C 26. D 27. BCProfessor Sun Jun, aged 93 in 2018, has devoted his life to working on China’s giant construction projects, including the Qinghai-Tibet highway, Three Gorges Dam, and the Yangtze River Tunnel. In his latest project, the Tongji University academic served as a senior adviser on the construction of the Hong Kong-Zhuhai-Macao Bridge.Under the guidance of Sun, Xu Wei, a professor in Tonji and Sun’s student, took over technical assistance for the construction of the bridge. “Every time I saw Sun and other professors working on the bridge,I felt at ease,” said Lin Ming, the general project manager. Lin initially invited an experienced Dutch company to serve as the technical assistant for the project. The company wanted to charge US $171million. He then asked for help from Xu along with experts in Tongji University.The methods developed by Tongji University reduced the impact of the bridge on the Chinese white dolphin, which is under first class state protection. The key challenge during the construction of the bridge was the 6.7-km underwater tunnel, the world’s longest and deepest undersea tunnel. Ding Wenqi, who was nickn amed the “ tunnel expert” , was asked to ensure the tubes be connected perfectly—even under the influences of land subsidence (下沉), water pressure and tide movement. Hu Xiangdong, another professor with Tongji, developed a method to freeze the earth around the tunnel to prevent water leakage and land subsidence during the digging of the most challenging 2-km section of the tunnel.The tunnel section of the project was completed in May 2017. Sun was invited to visit the near-completed bridge again in February 2018. The expert said he felt the most relaxed this time since most of the challenges have been conquered. “In the next step, we should focus on how tomake the two artificial islands more beautiful and attract travelers,” Sun said.Xu said all the staff in my office took a great pride in watching the TV news of the bridge’s official opening on Wednesday.28. What is Professor Sun’s contribution to the bridge?A. He worked in Tongji University.B. He was the general project manager.C. He gave much advice on the project.D. He took over the technical assistance.29. Why did Lin Ming ask for help from experts in Tongji University?A. The Dutch company charged too much.B. The technical assistant had too much trouble.C. Tongji University did best in the giant projects.D. He felt relaxed to see professors working on the bridge.30. What’s the greatest trouble in building the bridge?A. Protecting the Chinese white dolphin.B. Constructing the longest & deepest undersea tunnel.C. Controlling the water pressure.D. Preventing the tide.31. How did the expert stop water leaking in building the undersea tunnel?A. By keeping the tide moving.B. By digging deep into the sea.C. By increasing the water pressure.D. By freezing the nearby earth around the tunnel.DThe regular world presented to us by our five senses—you could call it reality 1.0—is not always the most user-friendly of places. We get lost in unfamiliar cities; we meet people whose language we don’t understand. So why not try the improved versi on: augmented reality (AR) or reality 2.0? AR technology adds computer-produced images (图像) on the real world via a mobile phone camera or special video glasses.Early forms of AR are already here. With the right downloads, smart phones can deliverinforma tion about nearby ATMs and restaurants and other points of interest. But that’s just the beginning. A few years from now the quantity of information available will have increased hugely. You will not only see that there’s a Chinese restaurant on the next b lock, but you will be able to see the menu and read reviews of it.This is where the next revolution in computing will take place: in the interface (界面) between the real world and the information brought to us via the Internet. Imagine bubbles floating before your eyes, filled with cool information about anything and everything that you see in front of you.Let’s jump ahead to ten years from now. A person trying to fix their car won’t be reading a book with pictures; they will be wearing a device that projects animated 3-D computer graphics onto the equipment under repair, labeling parts and giving step-by-step guidance.The window onto the AR world can be a smart phone or special video glasses. But in ten years’ time these will have been replaced by contact lenses (隐形眼镜) with tiny LEDs, which present something at a readable distance in front of the eye. So a deaf person wearing these lenses will be able to see what people are saying.The question is, while we are all absorbed in our new augmented reality worlds, how will we be communicating with each other?32. What does the text mainly talk about?A. The next information technology revolution.B. Early forms of augmented reality technology.C. The differences between reality 1.0 and reality 2.0.D. The relationship between people living in reality 2.0.33. What does the underlined word “it” refer to in Paragraph 2?A. The menu.B. The block.C. The revolution.D. The restaurant.34. What are tiny LEDs used to do?A. Protect people’s eyes.B. Show text and images.C. Warn users of dangers.D. Replace video glasses.35. What’s the author’s attitude towards AR technology?A. Doubtful.B. Disapproving.C. Favourable.D. Ambiguous.第三部分英语知识运用(共两节,满分45分)第一节完形填空(共20小题;每小题1.5分,满分30分)[来源:学科]阅读下面短文,从短文后各题所给的四个选项中,选出可以填入空白处的最佳选项。