阅读算法框图,如果输出的函数值在区间上,则输入的实数
的取值范围是( )
A. B.
C.
D.
Life is not always smooth. There was a man who had 36 numerous failures in his life. But he said, “One success is 37 for me!”
When he was five years old, his father died of illness without leaving him any 38 . Since then, his mother worked outside 39 he had to stay at home and take care of his siblings. He learnt cooking since then.
When he was fourteen, he dropped 40 and began his life of loving.
When he was eighteen, he married a girl, who, 41 , sold out all his properties and went back to her home several months after their marriage.
When he was twenty, he 42 his job from electrician to ferry staff to railway worker. All his jobs were 43 for him.
When he was thirty-five, misfortune again 44 on him. When he was driving across a huge bridge, the steel ropes along the edge of the bridge were broken and he fell into the river with his car. He suffered such severe injuries that he could no longer continue his 45 .
When he was 46 , he opened a gas station in a town. However, he 47 dispute (争端) because he beat his competitors 48 the billboard hanging problems.
When he was forty-seven, he 49 his second wife, which had 50 stricken his three children.
When he was sixty-six, he made a living by 51 his chicken-frying techniques to various restaurants in different places.
When he was seventy-five, he felt 52 to maintain his company, so he transferred his brand and patent to others. The new owner suggested giving him ten thousand stock shares as part of the purchasing price. But he 53 the suggestion. Later the price of the stocks of the company soared and he lost the chance of being a billionaire.
When he was eighty-eight, he achieved great success and became well-known to the whole world.
He was exactly the founder of Kentucky Fried Chicken, Ha Lunda Sandoz. He often said, “People always complain about the bad 54 . Actually it is not bad at all. As long as you are 55 and confident all the time, you will have a good weather every day. ”
36. A. achieved B. undergone C. tried D. undertook
37. A. great B. important C. valuable D. enough
38. A. words B. money C. property D. families
39. A. while B. but C. when D. so
40. A. in B. out C. down D. up
41. A. meanwhile B. moreover C. however D. therefore
42. A. started B. took C. lost D. changed
43. A. fit B. tough C. unusual D. adequate
44. A. fell B. hit C. put D. rested
45. A. life B. major C. job D. education
46. A. forty B. thirty-five C. fifty-three D. seventy
47. A. went through B. came into C. came about D. went against
48. A. contributing to B. judging from C. owing to D. leading to
49. A. changed B. married C. missed D. divorced
50. A. deeply B. highly C. generally D. thickly
51. A. learning B. promoting C. developing D. teaching
52. A. powerless B. depressed C. disappointed D. hopeless
53. A. turned up B. turned to C. turned down D. turned in
54. A. difficulties B. misfortune C. life D. weather
55. A. hard-working B. brave C. cautious D. optimistic
.向等物质的量浓度的Ba(OH)2 与BaCl2 的混合溶液中加入NaHCO3 溶液,下列离子方程式与事实相符的是( )
A.HCO3-+OH- =CO32-+H2O B.Ba2++OH-+HCO3-=BaCO3↓+H2O
C.Ba2++2OH-+2HCO3-=BaCO3↓+CO32-+H2O
D.2Ba2++3OH-+3HCO3-=2BaCO3↓+CO32-+3H2O
1. 依次填入下列各句横线处的词语,最恰当的一组是( )
(1)“据我所知,有关个人所得税的改革方案还在探讨中,目前还没有推出明确的时间表。”一位接近管理层的税收专家 。
(2)日前台湾公布了大学院校招收大陆学生的规定 简章,其中有不少歧视性限制,在一定程度上影响了台湾高校对大陆学生的吸引力。
(3)莫言的获奖,很难改变今天中国文学创作整体 的现实,也缓解不了我们的文化焦虑。
(4)毋庸置疑,铁路电话订票使很多旅客获得了便利。但是,铁路局数万张车票无人领取的状况也反映了有的旅客把电话订票当成儿戏,缺乏 的诚信。
A.披露 及其 良莠不齐 一言九鼎
B.披露 及 良莠不齐 一诺千金
C.透露 及 参差不齐 一诺千金
D.透露 及其 参差不齐 一言九鼎
2016年1月21日,由中方设计承建的印度尼西亚“雅万高铁”项目正式在印尼瓦利尼开工,这是中国铁路“走出去”战略的里程碑事件。作为我国创新型国家建设的重大突破和自主创新的标志性成果,其重要的战略意义有
①推动我国产业结构调整与转型升级 ②促进世界高铁技术的交流、合作与发展
③提高利用外资综合优势和总体效益 ④有助于“中国制造”向“中国创造”的转变
A.①② B.③④ C.②③ D.①④
读图文资料,回答问题。
(1)简述图中墨累—达令河径流量的特征。(3分)
(2)据图说明墨累—达令河流域农业生产模式的突出优点。 (3分)
墨累—达令河流域大部分地区年降水量在200~500毫米,农业需要灌溉。在20世纪20~70年代,由于不合理的开发利用,该流域的生态环境遭到破坏。
(3)运用地理环境整体性原理,说明随着农业的发展、灌溉的不断增加对墨累—达令河流域自然环境产生的影响。(4分)
下列三个化学反应的平衡常数(K1、K2、K3)与温度的关系分别如下表所示:
化学反应 | 平衡常数 | 温度 | |
973K | 1173K | ||
① Fe(s) + CO2(g) | K1 | 1.47 | 2.15 |
② Fe(s) + H2O(g) | K2 | 2.38 | 1.67 |
③ CO(g) + H2O(g) | K3 | ? | ? |
则下列说法正确的是( )
A.ΔH 1<0,ΔH 2>0
B.反应①②③的反应热满足关系:ΔH 2-ΔH 1=ΔH 3
C.反应①②③的平衡常数满足关系:K1·K2=K3
D.要使反应③在一定条件下建立的平衡向正反应方向移动,可采取升温措施
It’s clear that with unprecedented (空前的) pressure on our natural resources and our climate, the world economy needs to “green up”. The shift to a green economy represents one of the biggest business opportunities in decades. Already, the global low-carbon market is worth more than £3 trillion, and is set to reach £4 trillion by 2015 as more economies invest in low-carbon technologies.
And we need to focus on green growth because the price of inaction is too high. Business is constantly looking for ways to become more efficient and the competitive gains for British companies’ efficient use of resources such as water, energy and materials are enormous, with potential savings of about £23 billion a year. We do not underestimate the challenges that we face in moving to a green economy. We often take our natural resources for granted but these are not inexhaustible, and demand is increasing. This is an economic issue, it’s a development issue, and it requires global action.
Next month, I’m joining leaders in business, government and civil society from all over the world at the Rio+ 20 Earth Summit in Brazil. I’ll be calling for an absolute commitment from my international colleagues to inclusive (广泛的) green growth as the path to shared prosperity. Governments need to create the framework for the private sector (部门) to act. We want an agreement to develop sustainable development goals that meet the linked challenges of food, energy and water security.
At home, we’re providing support to companies that are changing the way they do business. Our Green Economy Council brings together government, businesses and the third sector to help us create the right way to enable action from everyone—from government, businesses and consumers. We in the government want to create an effective basis for the green economy, with policies that are helping growth and giving businesses the certainty to plan and invest.
A strong green economy will generate the investment and innovation (创新) to transform our products and services and capture new markets, though the case for green investment and green growth is compelling (有吸引力的), as we rebuild the British economy. To my mind, there is no other option.
59. It is time for the world economy to “green up” due to _______.
A. the appearance of low-carbon technologies
B. the present environmental problems like pollution
C. the increasing demand of worldwide population
D. the pressure on natural resource and climate
60. What can be learned from the second paragraph?
A. A green economy is in reality a development issue.
B. Inefficient companies will have to compete much.
C. Some businesses have efficiently saved a lot.
D. There are many difficulties on the way to a green economy.
61. To develop green economy, the governments should _______.
A. change the way companies do business
B. actively attend Rio+20 Earth Summit to be held in Brazil
C. make effective policies for the green economy
D. encourage businesses to invest more on sustainable energies
62. What is the author’s attitude towards the coming green economy?
A. Hopeful. B. Doubtful. C. Negative. D. Worried.
大陆沿岸在不同季节盛行不同方向的风会导致附近海域形成不同性质的洋流。从而使附近地理环境呈现出明显的季节差异。下图为某季节北印度洋局部海域示意图,据此完成4~5题。
4.图中①虚线代表的地理事物可能是( )
A.深海沟 B.岛弧链
C.板块生长边界 D.板块消亡边界
5.此季节图示洋流的影响是
A.对沿岸地区有降温减湿的作用
B.使西亚到中国的船只航速减慢
C.使该海域温度升高,影响鱼类生长
D.使该海域附近的污染物向西南方向扩展
苦马豆素(SW)最早是从植物灰苦马豆中分离获得,为了研究SW对肿瘤细胞DNA复制的影响.研究者提出了以下实验思路:
(1)实验分组:
甲组:培养液+肿瘤细胞+3H﹣TDR(3H标记的胸腺嘧啶脱氧核苷)+生理盐水
乙组:培养液+肿瘤细胞+3H﹣TDR+SW(用生理盐水配制)
每组设置若干个重复样品.
(2)分别测定两组的CRD(细胞内的放射性强度),求每组的平均值.
(3)将各样品在适宜条件下培养合适时间后,测定CRD,求每组平均值并进行统计分析.
(要求与说明:答题时用SW、CRD、3H﹣TDR表示相关名词)
请回答:
(1)肿瘤细胞DNA复制时所需的酶有 ,复制方式是 .
(2)预测实验的可能结果及结论: ,若乙组CRD明显高于甲组,则说明 ;
(3)实验中每组设置若干个重复样品的目的是 ,实验中采用3H﹣TDR的原因是 ,可根据 的变化来判断DNA复制情况.
任何虚拟空间,不能代替经典名著。通过阅读才能探求古代经典名著的本源,追溯经典的本真。对于经典名著的知识和内容,应该重视熟读、精读、细读、慎思,使之融入心灵、血脉,贯于践行。”从文化传承与创新的角度看,这是因为:
A.古代经典名著蕴含着中国优秀传统文化的基本精神
B.文化对人有潜移默化、深远持久的影响
C.阅读经典名著是建设文化强国的必然要求
D.推动社会实践的发展,是文化创新的根本目的
如图所示,作用于O点的三个力平衡。其中一个力为F1,沿-y方向,另一个大小未知的力F2与+x方向夹角θ,下列说法正确的是
A.力F3的最小值为
B.力F3只可能在第二象限
C.力F3可能在第三象限的任意区
D.力F3与F2夹角越小,则力F3与F2越小
亚硝酰硫酸主要用于分散染料重氮反应中取代亚硝酸钠,从而降低成本,提高产品质量。实验室用如图装置(夹持装置略)制备少量NOSO4H,并测定产品的纯度。已知:NOSO4H遇水分解,但溶于浓硫酸而不分解。
(1)装置A制取SO2,则A中反应的化学方程式为 , 导管b的作用是 。
(2)SO2与装置B中盛有的浓硫酸和浓硝酸的混合液在维持体系温度不得高于20℃的条件下,反应制得NOSO4H。反应过程中,亚硝酰硫酸和硝酸的物质的量随时间的变化如图所示。反应进行到10min后,反应速度明显加快,其可能的原因是_________________。
(3)装置C的主要作用是____________。
(4)该实验装置存在可能导致NOSO4H产量降低的缺陷是____________________。
(5)测定亚硝酰硫酸NOSO4H的纯度
准确称取1.500g产品放入250mL的碘量瓶中,加入0.1000mol·L一1、60.00mL的KMnO4标准溶液和10mL25%H2SO4溶液,然后摇匀。用0.2500mol·L-1草酸钠标准溶液滴定,消耗草酸钠溶液的体积为20.00mL。
已知:2KMnO4+5NOSO4H+2H2O=K2SO4+2MnSO4+5HNO3+2H2SO4
2MnO4一+5C2O42一+16H+=2Mn2++10CO2↑+8H2O
达到滴定终点时的现象为__________,亚硝酰硫酸的纯度为_________。
为贯彻落实党中央全面建设小康社会的战略部署,某贫困地区的广大党员干部深入农村积极开展“精准扶贫”工作.经过多年的精心帮扶,截至2018年底,按照农村家庭人均年纯收入8000元的小康标准,该地区仅剩部分家庭尚未实现小康,2019年6月,为估计该地能否在2020年全面实现小康,统计了该地当时最贫困的一个家庭2019年1至6月的人均月纯收入,作出散点如下:
根据盯关性分析,发现其家庭人均月纯收入与时间代码
之间具有较强的线性相关关系(记2019年1月、2月……分别为
,
,…,依此类推),由此估计该家庭2020年能实现小康生活.但2020年1月突如其来的新冠肺炎疫情影响了奔小康的进展,该家庭2020年第一季度每月的人均月纯收入只有2019年12月的预估值的
.
(1)求关于
的线性回归方程;
(2)求该家庭2020年3月份的人均月纯收入;
(3)如果以该家庭3月份人均月纯收入为基数,以后每月增长率为,问该家庭2020年底能否实现小康生活?
为破除垄断、创造平等投资机会、降低门槛,国务院最新发布的国字号文件《关于创新重点领域投融资机制鼓励社会投资的指导意见》中,关于如何鼓励社会投资、放开固有垄断领域、创造平等投资机会等问题,被频频提及。这些被提及的措施为社会资本进入重点领域提供了营利的空间和机会,也有利于发挥其在我国经济增长中的重要作用。
请运用《经济生活》的有关知识,说明鼓励社会资本进入重点领域的意义。
鉴别苯酚溶液、己烷、己烯、乙醛溶液和乙醇液体,可选用的最佳试剂是
A.石蕊试液、溴水
B.溴水、新制的Cu(OH)2
C.FeCl3溶液、金属钠、溴水、石蕊试液
D.KMnO4酸性溶液、石蕊试液
假定你是李华,希望通过外籍教师John找一位英语笔友。请写一封短信,描述一下你理想中笔友的条件,并说明为什么选这样的笔友。具体条件包括:
1. 年龄;2.性别;3.爱好(旅游、运动、养宠物等)。
注意:
1. 词数100左右;
2. 可以适当增加细节,以使行文连贯;
3. 开头语已为你写好。
Dear John,
I am writing to ask whether you are able to do me a favor.
Yours Li Hua