2019年《社区治理》网考任务1-4(正确率100%)
函数的奇偶性 高一上学期数学北师大版(2019)必修第一册
导入新课
问题1 下列各图，分别是怎样的对称图形？
第1、2图为轴对称图形，第3、4图为中心对称图形．
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问题2 在我们学习的函数中，有些函数的图象也具有对称性，请举出几个这样的函数．
一元二次函数的图象（轴对称）、反比例函数的图象（中心对称）．
y
O
y
y＝x2
x
O
1
=
x
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问题3 填写相应的函数值表，你发现了什么？
（1）f（x）＝2x4＋3x2；
（2）f（x）＝x3－2x；
4 − 1
（3）f（x）＝
；
2
（4）f（x）＝x2＋｜x｜．
（1）偶函数；
（2）奇函数；
（3）偶函数；
（4）偶函数．
目标检测
3
函数y＝f（x），x∈[－1，a]，（a＞－1）是奇函数，则a等于（
A．－1
B．0
C．1
D．无法确定
解析： ∵奇函数的定义域关于原点对称，
概念深化：根据定义，判断下列函数的奇偶性：
（1）f（x）＝－2x2；
（2）g（x）＝x4＋2；
1
（3）h（x）＝ 2 ；
1
（4）m（x）＝
．
＋2
1
（4）函数m（x）＝
定义域为｛x｜x≠－2｝，
＋2
定义域不关于原点对称， 所以函数既不是奇函数也不是偶函数．
新知探究
概念深化：根据定义，判断下列函数的奇偶性：
有什么共同特征吗？
不难发现，这两个函数的图象都关于y轴对称．
新知探究
追问1：那么如何使用符号语言精准地描述，函数图象关于y轴对称这一特征？
对于上述两个函数，f（1）与f（－1），f（2）与f（－2），f（3）与f（－3），f（x）与f（－x）有什么关系？
2023年北京海淀区高三一模地理试题及答案
I海淀区2022-2023学年第二学期期中练习高三地理W23.04本试卷共·8页，JOO分．考试时妖90分管j1.考生务必将答案特在特届卡上，在试在上作答无效．考试结·束后，将本试岳和1答阁卡－J手交问．第一部分本部分共15题，每题3分，共45分。
在每小题列出的四个选项中，选出最符合题目要求的一项。
囹1为某邮轮航行线路示意图。
读固，完成第i、2题。
I.图示航线A.东西跨度大于2万千米E硝每护乒＆� 寸3伊, .P_ -. I －…一，�2.1咽’8.位于太平洋，跨越两大洲｜乎←－…一一’一··． 卢c.北半球航段航行方向与洋流流向相反� )\:1～＼． . ·.D南半球航段熙凤的影响，顺风而行队夺£必←－..－＇...－－�↓2.12月川后，船员可能观察到刷理即「均可气、吧�l2JJ l7日A昼变短夜变长同－M…二；.12Jf 1λJ23°26'8.日落西北方向卢r12伊ISO" 180°,so•c.正午太阳高度角变大D.正午日；影由朝北变为朝南圈2为某处，地质剖面和海水深皮变化示意凶。
读图，完成第3,4题。
3.据困推断，该地比甲断层形成时间晚于三叠纪15 岩层①与②的形成环境相同c.保罗纪气候干旱，植被稀少0.石炭纪友坐过数次海陆变迁因l阁2a �－－－－→海水深度i飞........�怯融砂旧居γ．幌lf.: EEJn谷去军i B胞淀岩画：囡皑层头回附f> 田石灰料／蜗居！一·地层界线4.乙处地质构造的主要形成过程最可能是A.侵蚀搬运一断卸下陆一固结成岩c.地壳抬升－侵蚀搬运一当导报侵入8.团结成是」揣紫用；1出一地先抬升。
－回结成岩－挤压拱起←风化侵蚀占住，而有效辐射足地面辐射与池,ro吸收的大气i延辐射之差，，；..示地而客l乐损失的热量。
副3为甲、乙丙地池边有效辐射年变化示意囚。
2023届山东省泰安市高三下学期二轮检测(二模)地理试题及答案
试卷类型：A高三二轮检测地理试题2023.04注意事项：I.答卷前，考生务必将自己的姓名、考生号等填写在答题卡和试卷指定位置。
2.回答选择题时，选Ill每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动，用橡皮擦干净后，再选涂其他答案标号。
回答非选择题时，将答案写在答题卡上a写在本试卷上无效。
3.考试结束后，将本试卷和答题卡一并交回。
一、选择题：本题共15小题，每小题3分，共45分。
每小题只有一个选项符合题目要求。
我国某学校高三（2）秘地理兴趣小组在校国内开展日照观测活动，发现从9月23日开始，正午太阳光可透过窗户照射进本班教室（见下图）。
10月23日之后因南侧高楼对阳光的遮挡，本班教室内的正午光照消失。
一段时间后，正午太阳尤再次照进本班教室。
据此完成1～3题。
高三（8）班教室:ItI.该校可能位于A.古树l付n.如1JTf:j付 c.丰f.illi宇：0.云南省2. 10月23fl之后，1E'r-太阳光J!(01HXJl({ill；向穴（2）班技室的时间约为A.均年门川23日c.次年2月21日B.叫作12月22日D.次年3月21日商三地理试跑．第l页（共8页）3.与市汽（2）班..f-111·也.u 依门如l 冬-'i飞川WW•I.楼f·.,\'r,:.(R）”f.极发内的i"E 1f·光照A.f,i]IH/1\J现．协f址：lf.t1)1J 一样II.111] ll·t 111.00 • ！，�续lf.tli•J!J.!民c.It! 1,'-111 J'到.J ，�：纯Mil�一怦I>. JI! ,,,.,,,r,见．持续u 忡，l!J.!�过和I��>l 」:t :J ：行者实际通勤F 巨离与J,t 论政小边’』11!鸡之间的距，嘱差位．反映城市Ji)飞往关系与通Jb状态，JJ:..份爱涵盖h批＊和优化游力的常m 指标。
基本不等式(第2课时)(教学课件)-高一数学同步备课系列(人教A版2019必修第一册)
(2)S＝3 030－6x－
Smax＝2 430.即设计x＝50 m，y＝60 m时，运动场地面积最大，最大值为2
430 m2．
【巩固练习5】
某商品进货价为每件 50 元，据市场调查，当销售价格为每件
105
x(50≤x≤80)元时，每天销售的件数为
3 000
则y＝ x (6<x<500)，
y－6
S＝(x－4)a＋(x－6)a＝(2x－10)a＝(2x－10)· 2 ＝(x－5)(y－6)＝3 030－6x
15 000
－ x (6<x<500)．
15 000
15 000
≤3
030－2
6x·
x
x ＝3 030－2×300＝2 430．
15 000
故当矩形的长为15 m，宽为7.5 m时，
菜园的面积最大，最大面积为112.5 m2．
3
2 做一个体积为32 m ，高为2 m的长方体纸盒，当底面的边长取什么
值时，用纸最少？
解：设底面的长为a，宽为b，
则由题意得2ab＝32，即ab＝16．
所以用纸面积为S＝2ab＋4a＋4b＝32＋4（a＋b）≥32＋8 ab ＝64 ，
下面这些结论是否正确？错误的说明理由.
(1)若a>0，b>0，且a＋b＝16，则ab≤64.
(2)若ab＝2，则a＋b的最小值为2 2.
正确
错误，因为a，b不是正数
1
1
(3)当x>1时，函数y＝x＋−1≥2
1
(4)若x∈R，则 2 ＋2＋ 2+2≥2.
2020版oeko-tex■standard 100标准的更新和变化
福建轻纺2020年2月第2期X2020版OEKO—TEX®Standard100标准的更新和变化依照OEKO-TE史惯例，OEKO-TEX®standard 100在每年年初发布最新版本。
2020年1月7日官网发布了OEKO-TEX®standard100的2020版本。
经过3个月的过渡期，新标准将于2020年4月1日起生效。
与2019年版本相比，2020版OEKO-TEX®standard 100主要有以下变化：1重新定义和收紧了限量⑴2019年，致癌物N-亚硝胺和N-亚硝基物质作 为被“监测”物质加入，其结果仅用于参考，不做限 量要求；而2020年该类物质被包含入了附件4和附件6的限制目录中，由原来的14项物质新增一项N-Nitrosometh y leth y lamine(CAS10595-95-6，NMEA，N-亚硝基甲基乙基胺)变为15项，同时定义了限量为：N-亚硝胺：每一项0.5mg/kg;N-亚硝基物质：总计5.0mg/kg o⑵除草剂(草甘勝及其盐类)也由2019年的“监测”水平变为2020年的限制要求，定义的限量为：普通棉(conventional cotton)： 5.0mg/kg;有机棉(organic cotton)：I类产品0.5mg/kg，II 类、Ill类和IV类产品1.0mg/kg⑶有害元素总含量限定条目新增总碑和总汞要求：总斤申含量：100mg/kg;总汞含量：0.5mg/kg o⑷附件4中的邻苯二甲酸酯的总计限量由原来的1000mg/kg降至500mg/kg o⑸全氟化合物(PFCs)栏目新增两项“监测”要求：H,1H,2H,2H-全氟癸烷磺酸(8:2FTS)和它的盐(CAS39108-34-4);全氟辛酸(PFOA)的相关物质(REACH Annex XVII entr y68)2附件5和附件7新增了多项“监测”物质⑴新增下列芳香胺(ar y lamines)CAS121-66-4:2-氨基-5-硝基U塞卩坐；CAS156-43-4:对乙氧基苯胺；CAS615-50-9:2-甲基一对一苯二胺；CAS20265-97-8:对氨基苯甲瞇；CAS91-95-2:3,3'-二氨基联苯胺。
2023届湖南省部分名校高三下学期5月冲刺压轴大联考地理试题及答案
绝密食启用前名校联盟•2023届高三5月冲刺压轴大联考理地一、选择题：本大题共16小题，每小题3分，共48分。
在每小题绘出的四个选项中，只有一个选项是符合题目要求的。
近年来，中国在全泳手机生产网络中的地位不断上升，逐渐成为第一大手机出口商，出口目的地主妥是东亚、美国、欧盟．下图示意2007～2020年中国的全球手茸茸年份1.下列关于2007～2020年中国孚机出口贸易表述正确的是A.中国手机出口快速增长阶段是2007～2010年B.中国手机出口增速变化最大为2018～2019年c.中国手机出口增速波动变化，但始终在增加D.2007～2015年中国手机出口额逐年增加2.导致2018年以来手机出口增速变化的主要原因是①生产成本上升②贸易保护主义③国外手机品牌的冲击A .①①B .②③c .②④35 30 25 20 15主10罢5。
-5”10 -15机出口贸易总额（拉状）变化及榕这〈折线）.i妻函，完成1～3题。
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m O N H d甲∞－D N咀rE O N，社唱－O Nwt 呐－O N导”－C N法－－O N1600 1400i 只叙1200言1000吉800‘飞旦600 言400200＠流行性传染病D .①④3.中国手机企业未来发展重心在A.树立品牌B.销售网络c.生产工艺风能和太阳能发电份额的培加对市场化也价有显著的影响。
德国可再生能源发电市场已形成较完总的市场化也价机制，下图示意2017年第46用德国主妥发电源〈常规、凤，能、太阳能）和批发电价（日前价格〉。
读图，完成4～6题．D.技术研发ffi l页（共7页〉】E禽三他理曲抽回到崎Mm 抽泣。
远芒辑医药制幢幢盹量叫恻W 巳3棚川酷噩瞌翩翩翩一－’”一…晴天曲仿制布啕m m回JOo -"--再τ宵节t τ叩品：1】�；“年且“』但－·oII u恤圄11.13ll>.G611.14 ll”II 目j 舰且时i刻4.下列最符合德国能源市场描述的是A.凤能发电稳定，可作为发电的主要动力来源B.风能、太阳能发电可以降低电价，可以取代常规能源c.风能和太阳能发电德与常规能源发电互为补充。
六级英语真题2019年6月(第一套)试卷及答案详解
2019年6月六级（第1套）art ,r r i t i11 （e s )Directions : For U戏spa讥，you a ,r e allowed 30 1n初iutes to初讨te an ess a y on the importance �f motivation and methods in learning. You slwuld w讨te al least压Q words but no more than 200 words. a lJ奄Se cti on A c （、）Directions: In tJ砑s section, you 1vill hear two long conversation s. J\l the end吁each conversation , you初ill hear four questions. Both the conversation and the questions will be spoken only once.Aft er y o u hear a question, you must choose the best answer from the four choices marked A), BJ, CJ and D). Then mark the cor r esp �nding letter on Answer Sheet 1 with a single line t阮ough the centre.Questions 1 to 4 are based on the conversation you have just heard.1.A) A sLx-n1on出long negotiation.C)A project with a troublesome client.B)Preparations for the party.D)Gift wrapping for the colleagues.2.A) Take wedding photos.B)Advertise her con1pai1y.3.A) Hesitant.B)Neivous.4.A) Start her own bake对B)Improve her baking skill.C)Start a small business.D)Throw a celebration party.C) Flattered.D)Surprised.C)Share her cooking experience.D)Prepare food for the wedding.Questions 5 to 8 are based on the conversation you have just heard.5.A) They have to spend more time studying.B)They have to participate in club activities.C)They have to be more responsible for what they do.D)They have to choose a specific academic discipline.6 .. A) Get ready for a career. C)Set a long-term goal.B)Make a lot of friends.·D) Behave like adults.7.A) Those who share her academic interes区B)Those who respect her student commitmen区C)Those who can help her when she is in need.D)Those who go to the same clubs as she does.8.A) Those helpful for tapping their poten 血ial.B)Those conducive to improving their social sldlls.C)Those helpful for cultivating individual interests.D)Those conducive to their academic studies.Section BDirections: In this section, y ou will hear tu;o passage s. At the end Qt'each passage , yoii ivill hecir threeor four question s. Both the passage and the qu est ions will be spoken onlu once. A J勋you ,hear a questio n, you must choose the best answer fr o m the 如tr choices 1narked A), B J , CJ 吓d DJ.The n mark the cor>"e spondi ng let te r ;·on Answer Sheet 1 with a S'ingle l初w throiig h the centre.Questions 9 t o 11 are b ase d o n t he pa s sa g e y o u have just heard.9. A) They break awa y fr o1n trad ition al ways of t l un记ng.C) T h ey a r e good a t re fin i n g old formul邸B) They ai、e prep扣�ed to wor k h扛der th扣1anyone e lse. D) They bring their potenti al into full play.10.A) They c o ntlibuted to the popul釭ity of sk i li1g worldwide.B)They resulted in a br叨如ew st-y le of sl出ng technique.C)They pro1uoted the scientific use of sl血g poles.D)They 1nade explosive news in the spo1ts world.11.A) He was recog血ed as a ge11ius in the world o f sports.B)He con1peted in all 1n司or siding events in the world.C)He�r on tlu·ee gold 1nedals il1 one W血er Olympics.D)He broke tlu-ee world sl画g records il1 t肛ee years.Questions 12 to 15 are base d on t h e passage you ha v e just heard.12.A) They appe扣畛·r estless.C)They lose consciousness.B) They beco1ne upset.D)They die almost instantly.13.A) It has an聪团nt effect on your body chemistry.B)It keeps retm面ng to you every now and then.C)It leaves you witl1 a long-I邸ting impression.D)It contributes to the shaping of your m血．14.A) To succeed while feeling initated.B)To fee\ ha p py without good health.C)To be fyee fro1n frustration and failure.D)To enjoy good healtl1 while in dark moods.15.A) They are closely .connected.B)They function in a similar way. Section C C)They are too complex to understand.D)They reinforce each other constantly.Directions: In this section, you will·hear three .recordings of lectures or tal�fallowed by three or four questio邓.Tl花recordings will be played only once. After you hear a question, you must如ose the best answer from the four c加ices marked AJ,. BJ, CJ and DJ. Th砌mark theco汀esponding letter on Answer Sheet 1 with a single line through the c叩re.Questions 16 to 18 are based on the recording you have just heard.16.A) They differ in their appreciation of music.B)They focus their attention on different things.C)They fmger the piano keys in different ways.D)They choose different pieces of music to play.17.A) They manage to cooperate well with their teammates.B)They use effective tactics to defeat their competitors.C)They try hard to meet the spectators'expectations.D)They att a ch great importance to high perfom1ance.18.A) It marks a breakt虹ough in behavioral science.B)It adopts a conventional approach to research.C)It suppo虑a piece of conventional wisdom.D)It gives rise to controversy among experts.Questions 19 to 21 are based on the recording you have just heard.19.A) People's envy of slim models.C)The increasing rai1ge of fancy produc区B)People's craze for good health.D)The great variety of slinuning products.20.A) The y appe a r vi g or ou s.B)They appe ru·str an ge、21.A) Cultu r e ai1d upb血gh1g.B)Weal小and social status.C)T h ey lo ok ch ar mi ng.D)111ey loo k un he althy.C)Pe er pr es su re.D)Me dia i皿ue nc e.Questions 22 to 25 are based on the r e co r ding you have just heard.·22. A) The relation between hair叨d sl血.C) The color of huma n skin.B)T l1e g .ro,ving interest il1 sl如studies.D)吓e need of s灼n protect ion.23.A) The necessity to save energy.C)The need to breathe with case.B)Adaptation to the hot envl1'01u11ent.D)Drarnati c c1imate changes on earth.24.A) Lea v es and grass.C)Their sldn color ing.B)Man-111ade shelter.D)Hair on their skin.25.A) T11eir genetic 1nakeup beg扣1to change.B)The让conm1unities beg扣1to grow steadily.C)Their children began to m坎wit h each other.D)Their pace of evolutio n began to quicken.·11g Co1nprel1ension（． 1nu t es) Sect ion ADirections: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified bya lett砑;Please mark the corresponding letter for each item on Answer Sheet 2 with a singleline through tlie centre. You may not use any of the words in the bank more than once.Pasta is no longer off the menu, after a new review of studies suggested that the carbohydrate can form part of a healthy diet, and_even help people lose weight. For years, nutritionists have recommended that pasta be kept to a 26 , to cut calories, prevent fat build-up and stop blood sugar 27 up.The low-carbohydrate food movement gave birth to such diets as the Atkins, Paleo and Keto, w垃ch advised swapping foods like bread, pasta and potatoes for vegetables, fish and meat. More recently the trend of swapping spaghetti for vegetables has been 28 by clean-eating experts.But now a 29 review and analysis of 30 studies by Canadian researchers found that not only does pasta not cause weight gain, but three meals a week can help people drop more than half a kilogram over four months. The reviewers found that pasta had been unfairly demonized (妖魔化）because it had been 30 in with other, more fat-promoting carbohydrates."The study found that pasta�dn't 31 to weight gain or increase in body fat," said l e ad au-thor Dr John Sievenpiper. "In 32 the evidence, we can now say with some confidence that pas扫does not have an 33 effect on body weight outcomes when it is consumed as part of a healthy dietary pattern." In fact, analysis actually showed a small weight loss. So 34 to concen1s, perhaps pasta can be part of a healthy diet.Those involved in the 35 trials on average ate 3.3 servings of pasta a week西tead of other carbohydrates, one serving equaling around half a cup. They lost釭O皿d half a kilo g ran1 over an averag e follow-up of 12 weeks.A)adverseB)championedC)clinicalD)contrary E)contributeF)intimateG)lun1pedH)magnifiedI)mininnun.J) radiatingI() rationL)shoot jngM)subscribeN)systemati0)we i g血g, ..... , ... __Section BDirections: In t hi s se ction, yo u are going to r ea d a p a ssa g e wi th t e n s t a te ments a tt ached to it. Each s t a t e1ne讥conta ins i可o r niatio n g iv e n i n on e of t h e paragr ap hs. Identif y the paragrap h fromwhi c h t i花？．对orni at i o n is der·i v ed You may ch oo s e a paragraph m ore th a n once. Each parag r aph, is n i a rked'Wi t h a le t ter. A邓wer t h e que s tio邓by m a rking t h e corres p onding letter onAnswer Sheet 2.The Best Retailers Con1bine Bricks and Clicks[A]Reta i l pro fits扛e fallil1g sharply. Stores扛e closing. Mall s are emptying. The d epressing stories ju stk e e p coining. Reading the ean血gs announce1nents of lar ge retail stores like Macy's, Nordstrom, an d际get is about as uplift i l1g as a totrr of叨intensive care unit. The internet is apparently ta ki ngdo\\111 yet another il1dustiy. B忧ck and nior t ar stores (实体店）seem to be going the way of the yellowpages. S ure e nough, the Ce11.Sus B m·eau j ust released d a ta s h owin g that online retail sales surg e d15.2 percent between the fu-st qua1ter of 2015 and the first quarter of 2016.[B]But before you dmnp all of yom·retail stocks, there are more facts you should consider. L oo ki ngonly at that 15.2 percent "surge" would be misleading. It was an increase t hat was on a small baseof 6.9 percent. Even when a血y number grows by a large percentage terms, it is often still tiny.[C]More than 20 yea1"S after the internet was opened to commerce, the Census Bureau tells us thatb百ck and mo1tar sales accounted for 92.3 percent of retail sales in the frrst quarter of 2016. Theirdata show that 01让y0.8 percent of retail sales shifted from offline to online between the beginningof 2015 and 2016.[D]So, despite all the talk about drone (无人机）deliveries to your doorstep, all the retail executivesexpressing ar议ety over cons�ers going online, and even a Presidential candidate exclaiming thatAmazon has a "huge antitrust problem," the Census data suggest that physical retail is thriving. Ofcourse, the closed stores, depressed executives, and·sinking stocks suggest othenvise. What's thereal story?[E] Many firn15 operating brick and mortar stores are in trouble. The retail industry is getting "reinvented," as we describe in our new book Matchmakers. It's standing in the path of what Schumpetercalled a gale (大风）of creative destruction. That storm has been brewing for some time, and asit has reached gale force, most large retailers are searching for a response. As the CFO of Macy'sput it recently, "We're frankly scratching our heads."[F]But it's not happening as experts predicted. In the peak of the bubble, brick and mortarretail·was one of those industries the internet was going to·kill—and qttickly. The dot. c on1 bustdiscredited most predictions of that sort and in the years that followed, conventional retailers'confidence in the future increased as Census continued to report weak online sales. And then thegale hit.[ G]It is becoming increasingly clear that retail reinvention isn't a simple battle to the death between bricks and clicks. It is about devising retail models that work for people who are making increasingu s e o f a growing array of internet-connected tools to change how they sea:r·c h, shop, and buy. Creative retailers are using the new technologies to inno_vate just about everything stores do fron1 managing inventory, to marketing, to getting paid.[H]More than drones dropping a new supply of underwear on yotff doorstep, Apple's n1assively successful brick-and-mortar-and-glass retail stores and Amazon's small steps in the san1e曲ection ar·e whatshould keep old-fashioned retailers awake at night. Not to n1ention the large ntunber of creative newretailers, like Bonobos, that are blencting online and offline experiences in creative ways.[I]Retail reinvention is not a simple process, and it's also not happening on what used to be called"Internet Time." Some internet-driven chai1ges have happened quickly, of course. Craigslist qtticklyovertook newspaper classified ads and turned newspaper economics upside down. But 1uany widelyanticipated changes weren't quick, and some haven't really started. With the benefit of hindsight·(后见之明），it loo k s like the i n t e rn e t w i l l t ransfonn the e con om y at s omethi ng like th e pace of otherg r eat iI1v enti ons like e lec t ric i ty. B2B c o1nn1e r ce, f o r e x a mpl e, di d n't move mainl y o n l in e by 2005 as1nan y had p re di cted iI1 2000, no r even by 2016, b ut th a t d oe sn't me a n i t w on't do so over the next few decades.[JJ But the gale i s s till blo面ng.T he sudden decline i n f oot t r affic in r e c e n t years, e ven though it h邸n't been accon1p画ed by a 1nassive dee血e in phys i ca l sal es, i s a cr i tical waming. People can shop 1nore effic iently onliI论邸d the r efore don't need to go t o as many stores to fin d what they want.There's a surplus of physical shoppmg space fo r t he cr ow ds, which is one reason why stores are downsizing and closmg.[KJ The rise of tl1e 1nobile phone has recently a d d e d a new level of complexity to the process of retail reinvention. Even five ye釭s ago 1nost p e op l e f a ced a choice. S i t at your co m puter1 probab l y at home or at tl1e office, se扣，ch and browse, and buy. Or head o ut t o th e maJJ, or Main Street, look and shop, 邸d b u y. Now, jttst about everyon e has a s mart p hone, connected to the 1ntemet almost ever ywhere aln1ost a l l tl1e tune. Even when a retailer gets a cust omer to walk in the store, she can eas ily see if tl1ere's a better d e al onlme or at ai1other store nearby.[L]So far, tl1e n1呴晌g1nany匝ge re t a i lers have done in response to all this is to open o咄ne stores, so people ,;v诅con1e to them directl y rather than to Amazon and i岱smaller online rivals. Many ar e ha血g the san1e problem that newspapers have had. Even if they get online traffic, th e y struggle to n1ake enough money online to compensate for what they are losing offline.[M]A few seem to be making tllis work. Among large traditional retailers, W a lmart recently reported the best resul朽，leading its stock price to surge, while Macy's, Target, and Nordstrom's dropped. Yet \�T almaii:'s year-over-y ear online sales only grew 7 percent, leading i区CEO to lament (哀叹），"Growth here is too slow." Part of the problem is that almost two decades after Amazon filed the one-click patent, the online retail shopping and buying experience is filled with frictions. A recent study gr aded more than 600 internet retailers on how easy it was for consumers to shop, buy, and pay. Almost half of the sites didn't get a passing grade and only 18 percent got an A or B.[N]The turmoil on the ground in physical retail is hard to square with the Census data. Unfortunately, part of the explanation is that the Census retail data are unreliable. Our deep look into those data and their preparation revealed serious problems. It seems likely that Census simply m达cl郘sifies a large chunk of online sales. It is certain小at小e Census procedures, which lump the online sales of ma j or traditional retailers like Walmart with "non-store retailers" like food trucks, can mask m aj or changes in individual retail categories. The bureau could easily present their data in more useful ways, but they have chosen not to.[O]Despite the turmoil, brick and mortar won't disappear any rune soon. The big questions are which, if any, of the lar g e traditional retailers will still be on the scene m a decade or two because they haYe successfully reinvented themselves, which new players will operate busy stores on Main汕eemaybe even in shop p ing malls, and how小e shopping and bu yin g experience will have ch邸g ed in each retail catego ry. Investors shouldn't write off brick and mortar. Whether小ey shottld bet on the traditional players who皿1those stores now is another matter.36.Although online retailing h郘existed for some twenty years, nearly half of tl1e皿e1net retailers stillfail to receive satisfactory feedback from consumers, according to a recent stuvey.37.Innovative retailers integrate internet teclmotogies with conventional re皿血g to create nevretail models.38.Despite what the Census data suggest, the valu e of'physical ret a il's stocks has been巾opping.39.Internet-driven changes in the retail indust11r didn't take place as quicldy as·widely皿icipated.40.Statistics indicate that brick and mo1iar sales still n1ade up the lion's share of the retail busil1ess.panies that successfully combine online and offline busmess 1nodels n1ay prove to be a big concem for traditional retailers.42.Brick and 1no1tar retailer s'f a i th in their busin ess was stre n g th e n e d w h e n t he do t.c om bubb le burst.43.Despite the tren1endou s c h a l l e n g es f r onl o咖e re扫iling,tra di tio n al ret ai l ing w i l l b e h ere t o st ay forq田te son1e t ilne.44.With tl1e rise o f o咄ne conunerce, physical re t a i l stores a re l i l<ely t o s可fer the sam e fate邸the yellow pages.45.The ,:\ride use of sn1art p hones has made i t 1nore cornplex for traditional retailers to reinvent t h eirbusiness.Section CDirections: Tliere m·e 2 passages in this se t ion Each passag e is foll o w e d by some question s or unfinished Sta勋nents.F01、each of them there are four choices m a rk e d AJ, BJ, CJ and D). You should如c i如on t加best clwice and mark ti忆con·e sponding letter on Answer Sheet 2 with a singleline ti矿ough the cen阮．Pa.,sag c On(Questions 46 to 50 are based on the following passage.Professo r Step h en Ha,v血g has wai'lled that the creation of powerful artificial intelligence (AI) w ill be "eitl1er tl1e best, or the wo区t tl血g,ever to happen to humanity", and praised the creation of an acadenuc institute dedicated to researcl血g the future of intelligence as "crucial to the future of our civilisation and om·species".Hawking was speaking at the ope血g of the Leverhulme Centre for the Future of Intelligence (LCFI) at Can如dge University, a 1nulti-disciplinary institute that will attempt to tackle some of the open-ended questions啦sed by tl1e rapid pace of development in AI research. " We spend a great deal of time s tu d yin g histo ry," Hawking said, "which, let's face it, is mostly the history of stupidity. So it's a welcome change that people are studying instead the future of intelligence."W血e the world-renowned physicist has often been cautious about AI, raising concerns that humanity could be the architect of its own destruction if it creates a super-intelligence with a w诅of its own, he was also quick to highlight the positives that AI research can bring. "The potential benefits of creating intelligence are huge," he said. "We cannot predict what we might achieve when our own minds are amplified by AI. Perhaps with the tools of this new technological revolution, we will be able to undo some of the damage done to the natural world by the last one—industrialisation. And surely we will aim to finally eradicate disease and poverty. And every aspect of our lives w山be transformed In sho比success in creating AI could be the biggest event in the history of our civilisation."Huw Price, the centre's ac�demic director and the Bertrand Russell professor of philosophy at Can1-bridge University, where Hawking is also an academic, said that the centre came about partially as a result of the university's Centre for Existential Risk. That institute examined a wider range of potential problems for humanity, while the LCFI has a narrow focus.AI pioneer Margaret Boden, professor of cognitive science at the University of Sussex, praised the progress of such discussions. 心,recently as 2009, she said, the topic wasn't taken se1iously, even am ong AI researchers. "AI .is hugely exciting," she said, "but it has limitations, which present grave dange1'S given uncritical use."The academic community is not alone in warning about the potential dangers of AI as well as the potential benefits. A number of pioneers from the technology industry, most famolIBly the en杠epren画Elon Musk, have also expressed their concerns about the damage that a super-intelligent AI coltld do to hmnanity.46.What did Stephen Hawking think of artificial intelligence?A)It would be vital to the progress of human civilisation.B)It might be a blessing or a disaster in the making.C)It might present chaJlenges as well as o pportunities.D)It would be a significant expansion of human intelligence.47.Wl1at did Hawldng say about the creation of the LC FI?A)It would acce ler ate the prog ress of AI resea rch.B)It wou l d 111扛k a s tep fo1--w扛d in the AI indus try.C)It ,,v as ex廿en1e l y ilnpo印nt to the destiny of hurnanl<lnd.D)It ,,v as扣1acl lieve1nent of 111咄i-d i s ciplinary collaboration.48.Wl1at did Ha,vl血g say was a wel cmn e change it1 AI research?A)Tl1e sl血of rese釭ch focus frmn the past to the future.B)The sl血of research fron1 the o i"J to ilnplernentation.C)T11e greater e1nphasis on the negative ilnpact of AI.D)The increasing awareness of 111扣曲nd's p匈stupidity.49."i11at concen1s did Hawl<lng raise about AI?A)It n1ay exceed htun邸血elligence sooner or later.B)It 1nay ulti1nately over-ainplify the luunan m皿C)Super-血elligence1nay cause its own destruction.D)Super沁telligence1nay eventually r面n mankind.50.What do we le血1about son1e entrepreneurs from the technology industry?A)Tl1ey are much influenced by the academic community.B)They are n1ost likely to benefit fron1 AI development.C)They share the same concerns about AI as academics.D)They believe they can keep AI under human control.Pa ssage TwoQuestions 51 to 55 are based on the following passage.The market for products designed specifically for older adults could reach $30 billion by next year, and startups (初创公司）want in on the action. What they sometiines lack is feedback from the people who they hope will use their products. So Brookdale, the country's largest owner of retirement communities, has been inviting a few select en订epreneurs just to move in for a few days, show off their products and hear�r hat th e-residents have to say.That's what brought Dayle Rodriguez, 28, all the way from England to the dining room of Brookdale South Bay in Torrance, California. Rodriguez _is the community and marketing manager for a company called Sen组b.The startup's product, SentabTV, enables older adults who may not be comfortable "ith computers to access email, video chat and social media using just their televisions and a ren1ote control."It's nothing new, it's nothing too complicated and it's natural because lots of people have TV remotes," says Rodriguez.But none of that is the topic of conversation in the Brookdale dining room. Instead, Ro中超uez solicits residents'advice on what he should get on his cheeseburger and how he should spend the afte1noon. Playing cards was on the agenda, as well as learning to play mahjong (麻将）．R o driguez says it's important that residents here don't feel like he's selling them son1etl血g.·'I've had more feedback in a passive approach," he says. "P lay i ng pool, play i ng cards, having dinner, having lunch," al l work better "than going through a sur vey of questions. When they get to即ow n1e and to t1--i1st me, 血o咖g for sure I'm not selling them something—there'll be 1nore honest feedback f r o1n then1."Rodriguez is just the seventh entrepreneur to m ove into one of Brookdale's 1,100 senior living con1-munities. Other new products in the program have inclu d e d a kind of f1tll-body blow dryer and specially designed clothing that allows people with disabilities to dress and undress the1nselves.Mary Lou Busch, 93, agreed to try the Sentab sys t e m. She tells Rodrigue z that it might be good for someone, but not for her."I have the comput er and FaceTir ne, which I talk wi t h m y family o n," she ex呻lains.She also has an iPad and a s martphone. "So I do pretty much everything I n e ed to do."To be f血，i f R o 面gu e z had wan ted f ee db ac k from som e more te c hn o pJwbi c (害怕技术的）seniors , he n1ight have ended up in the w i·o ng B roo kdale co m m uni t y . Th is on e is loc ated in the heart of Soutl1em Califo1面a's aero space conidor. Many residen ts h ave backgrounds in engineering, busin ess and acadenuc c让cles.But Rodriguez says he's still le叩血g so m e th i n g i lnporta n t by moving into this Brookdale community: "People are 11ore tech-proficient thru1 we t h ought."知d besides, ,vhere else would he leain to play 1naltjong?51.,¥I1at does the passage say about the s尥1tups ?A)T11ey never lose tilue il1 upg1�ading products for seniors.B)T11ey w·r u1t to have a shat 、e of the senio对goo d s m arket.C)T11ey i11vite se11io1-s to their con1p皿es to try their products.D)They try to profit fron1 pro1110血g digital products to seniors.52.Some entreprenem-s have been invited to Brookdale to. A)have an intervie,v with potential custo1nersB)conduct a smvey of re证e1nent co1nmunitiesC)collect residen 岱'feedback on their productsD)show senior residen岱how to use IT products53.What do we lmow about SentabTV?A)It is a TV program catering to the in�erest of the elderly.B)It is a digital TV which enjoys popularity among seniors.C)It is a TV specially designed for seniors to view programs.D)It is a communication system via TV instead of a computer.54.What does Rodriguez say is important in promoting produc岱？A)Winning trust from prospective customers.B)Knowing the likes and dislikes of customers.C)Demons盯ating their superiority on the spot.D)Responding promptly to customer feedback.55.W地t do we learn about the seniors in the Brookdale community?A)Most of ·them are interested in .using the Sen也b.B)They are q血e at ease with high-tech produc区C)They have much in common with seniors elsewhere.D)Most of them enjoy a longer life than average people.ar anslation c �Directions: For this part, you are allowed 30 minutes to translate a passage from Chinese into English. Y o u slwuld w忧te your answer on Answer Sheet 2.中国幅员辽阔，人口众多，很多地方人们都说自己的方言。
2019年全国III卷高考数学(文科)试题(带答案)
A
因此DM.LCG.
在Rt6.DEM中 ， DE=l. EM＝石 ，故DM=2.
所以四边形ACGD的面积为4.
20. (12分）
已知函数／（x)=2x'-ax'+2 .
( 1 )讨论／（x）的单调性；
(2)当0<a<3时，记f(x)在区间[0,1]的最大值为M,最小值为m， 求M-m的取伯范围
解：
(I) f'(x)=6x1 -2ax=2x(3x-a).
l烦率／组距
03. 0•········-·····-·········
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0.05
频率／纠距
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00. 51········
芦Lt 0 2,5 3,5 4.5 5.5 6 5 7.5
甲离子残衔百分比n方图
乙离子残钳Li分比五方图
记C为水件： ＂乙离千残留在体内的百分比不低千55. ",根据直方图得到P(C )的估计值为0.70
(I)求乙离子残衍百分比直方图中a, b的值；
(2)分别估计甲、乙离子残衍百分比的平均值（同一组中的数据用该组区间的中点值为代表） ．
一2 —
蛁：
(I)山已知得0.70=a+0.20+0.15 ,故
a=0.35 .
b=1-0.0 S-O.IS -0.70 =0.IO
(2)甲离子残留百分比的平均值的估计值为
B.
/(log，
一I4）汀(2-,' ）汀
＿2 (2勺
-－2
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l
D. /(2 1)>/(2')>/(log) 一4）
二、填空题：本题共4小题，每小题5分，共20分．
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社区治理第一次作业试卷总分：100 测试时间：-- 试卷得分：95一、单项选择题（共15 道试题，共75 分。
）得分：701.社区居民在长期实践过程中逐步形成的富有个性的群体意识、价值观念、行为模式和生活方式等属于（）A. 狭义的社区管理2.将社区分为居住社区、商业社区、工业社区、政治社区的标准是（）B. 社区发挥的功能3.（）是我国城市覆盖面最广、最普遍的基层群众性自治组织，在城市管理中具有重要地位。
C. 居民委员会4.街道办事处与居民委员会的关系是（）。
D. 指导、支持与帮助的关系5.狭义的社区环境是指“影响社区居民生活的环境因素”，即社区的内部环境。
狭义的社区环境也可称之为特殊意义的社区环境，它把居住在某一特定社区的居民作为主体，它不包括（）社会环境，也就是社区的生存环境和治安状态D. 物质环境，也就是社区环境物质方面的总和6.社区精神环境不包含下列哪一项（）C. 社区与政府关系7.根据物业规模的大小，业主委员会一般设委员（）名。
A. 5-158.社区环境建设工作一定的共同特征，其中不包括（）A.社区环境建设的能动性9.社区管理的作用不包括（）A.平衡作用10.街道办事处是（）人民政府的派出机关C.设区的市或市辖区11.广义的社区环境不包括（）D. 物质环境12.社区环境和社区管理的关系主要表现在社区管理要适应社区经济环境的发展水平；社区管理要适应社区文化环境等综合状况；社区管理要适应社区自然环境的特点；社区管理对社区环境的反作用，因此（）B. 社区环境决定社区管理13.美国社区治理是多个主体自由和平等参与的过程，这些主体不包括（）D. 志愿者14.滕尼斯将社区分为三种，其中不包括（）D. 文化社区15.街道办事处重新恢复其正常作用是在（）D. 1978年二、判断题（共 5 道试题，共25 分。
）得分：251.滕尼斯把传统社会的社区形态界定为人们有目的的基于理性和算计的选择，靠法理维系人际关系的契约性社会组织。
A. 错误2.社区不是一个新生的事物，而是一个古老的社会生活单位。
B. 正确3.就社区发展专业而言，我们一方面承认城市化过程带来的对农村的破坏和掠夺，另一方面主张帮助社区居民选择合适的技术和项目，促进社区的发展。
B. 正确4.滕尼斯把现代社会定义为依靠血缘和亲缘关系的靠情感和习俗来维持人际纽带关系的长期稳定的地域生活共同体.A. 错误5.社区建设和社区治理的一个重要任务就是通过人们的交往互动，从而增强人们的心理归属和认同。
B. 正确社区治理第二次作业试卷总分：100 测试时间：-- 试卷得分：0一、单项选择题（共 5 道试题，共25 分。
）得分：251.有的学者认为是社区教育是源于20世纪初美国实用主义教育家杜威提出的“（）”D.学校是社会的基础2.中国古代的“文化”概念，基本属于（）的范畴。
A. 精神文明3.下面哪项功能是保障社区生活安定的最后手段（）。
D. 惩戒功能4.在实行社会治安综合治理过程中，因领导工作失职，造成本地区和本单位治安秩序严重混乱等情况发生得，对本地区、本单位及其领导干部给予取消其评选综合性的荣誉称号、评先受奖、晋职晋级的资格，这种制度为（）A. 一票否决制5.日本曾根据社区教育发展的形势，对（）进行了屡次修改以保证社区教育的顺利推进。
A. 学校教育法二、判断题（共15 道试题，共75 分。
）得分：751.各个地区和国家所使用的社区治理的策略都有其各自的特点，任何地区都无法照搬别的地区的做法和经验。
B. 正确2.一般来说，本国的社区治理的策略和本国的社会文化基础、政治制度、经济制度等基本背景没有关系。
A. 错误3.对于发展中国家而言，稳定有着重要的意义，没有稳定的环境就没有有效地治理。
B. 正确4.治理不是一整套规则条理，也不是一种活动，而是一个过程。
B. 正确5.治理过程的基础是控制和支配，而不是协调A. 错误6.治理作为一种政治管理过程，也像政府统治一样需要权威和权力，最终目的也是为了维持正常的社会秩序，推动社会发展，这是治理和统治的共同之处。
B. 正确7.善治，就是使公共利益最大化的社会管理过程B. 正确8.社区治理的策略选择，是指调动社区内外的资源和力量，有所取舍、有所侧重地管理社区事务的制度、方针和方法。
B. 正确9.社区问题不是社会问题在社区层面的表现A. 错误10.社会学上一般认为，在乡土社会，社会团结和控制的纽带主要不是靠法制，而是靠文化道德规范和社会群体间的纽带，就是所谓的情理社会关系。
B. 正确11.治理既涉及公共部门，也包括私人部门B. 正确12.中国学者俞可平提出了善治的四个要素。
A. 错误13.治理不意味着一种正式的制度，而是持续的互动B. 正确14.在当代，作为善治要素的公正特别要求有效地消除和降低富人和穷人、富国和穷国之间的两极分化，维护妇女儿童、少数群体、穷人等弱势人群的基本权利。
B. 正确15.善治的本质特征在于政府权威对民众的管理，而不是政府与公民对公共生活的共同合作管理。
A. 错误社区治理第三次作业试卷总分：100 测试时间：-- 试卷得分：0一、单项选择题（共 5 道试题，共25 分。
）得分：251. 社区服务最早诞生在19世纪中后期的（）国。
A. 英2.社区服务的本质属性是它的（）。
C. 福利性3.（）是社区经济诸特征中最为突出的体现。
B. 社会性4.我国从（）开始兴起并实施现代意义上的社区服务。
B. 20世纪80年代5.我国社区服务管理体制存在行政化的和（）的两种模式A.社会化二、判断题（共15 道试题，共75 分。
）得分：751.目前街道办事处的工作对象已经涵盖了几乎所有户口在辖区以及在辖区工作居住的人口B. 正确2.第三部门的发展不受国家经济社会体制影响。
A. 错误3.权力寻租不是政府干预的必然产物，有政府干预的地方不会产生权力寻租。
A. 错误4.帕金森定律指出，无论政府的工作量是增加还是减少，或者已经根本没有任何工作了，政府机构的人员数量总是按照同一速度递增。
B. 正确5.当政府成为社会最高权力机构，权力本身就会产生腐蚀力量，尤其不受任何力量制约的专制全权政府。
B. 正确6.市场机制是以等价交换、公平竞争、自由开放作为主要特征的。
B. 正确7.市场竞争会导致贫富悬殊差别和两极分化，进而影响社会的公平和安定。
B. 正确8.街道办事处设专职干部3-7人，其中包括街道妇女干部不少于3人A. 错误9.目前，居民委员会的职能和工作范围几乎拓展到了辖区内的各项工作。
B. 正确10.第三部门是指第三世界国家内部的非营利组织A. 错误11.决策失误常常以过度干预和干预不足两种形式表现出来B. 正确12.古代传统社会社区经济活动受社区需求的调节，社区经济活动一般是不受环境资源影响的。
A. 错误13.街道办事处成立后，其主要工作对象是“单位体制”以外的社会闲散人员和家庭妇女。
B. 正确14.市场机制不是万能的，但是和政府机制相比，政府机制显得无足轻重。
A. 错误15.《城市街道办事处组织条例》颁布后，从1965年起，全国各地城市都根据此条例建立健全了街道办事处组织。
A. 错误社区治理第四次作业试卷总分：100 测试时间：-- 试卷得分：0一、单项选择题（共 5 道试题，共25 分。
）得分：251.在实行社会治安综合治理过程中，因领导工作失职，造成本地区和本单位治安秩序严重混乱等情况发生得，对本地区、本单位及其领导干部给予取消其评选综合性的荣誉称号、评先受奖、晋职晋级的资格，这种制度为（）A.一票否决制2.社区参与的制度化环境，即现有的“三会制度”，其中不包括（）D. 代表会3.社区服务最早诞生在19世纪中后期的（）国。
A. 英4.完善社区民主选举的措施很多，其中不包括（）C. 提高社区精神文明建设5.街道办事处是（）人民政府的派出机关C. 设区的市或市辖区二、判断题（共15 道试题，共75 分。
）得分：751.社会学上一般认为，在乡土社会，社会团结和控制的纽带主要不是靠法制，而是靠文化道德规范和社会群体间的纽带，就是所谓的情理社会关系。
B. 正确2.市场竞争会导致贫富悬殊差别和两极分化，进而影响社会的公平和安定。
B. 正确3.权力寻租不是政府干预的必然产物，有政府干预的地方不会产生权力寻租。
A. 错误4.滕尼斯把传统社会的社区形态界定为人们有目的的基于理性和算计的选择，靠法理维系人际关系的契约性社会组织。
A. 错误5.当政府成为社会最高权力机构，权力本身就会产生腐蚀力量，尤其不受任何力量制约的专制全权政府。
B. 正确6.基层政府或其派出机关对基层自治组织的工作给予指导，而基层自治组织则协助政府开展工作。
B. 正确7.社区服务业的基本任务是充分发挥国家、集体、个人三者的积极性，依靠社会各个方面的力量兴办社区服务业。
B. 正确8.早期社区服务的定位很清楚，就是针对老年人的照顾。
A. 错误9.各个地区和国家所使用的社区治理的策略都有其各自的特点，任何地区都无法照搬别的地区的做法和经验。
B. 正确10.自我教育就是通过开展社区居民自治活动，使居民受到各种教育，每位居民既是教育者，又是受教育者。
B. 正确11.治理过程的基础是控制和支配，而不是协调A. 错误12.中国学者俞可平提出了善治的四个要素。
A. 错误13.决策失误常常以过度干预和干预不足两种形式表现出来B. 正确14.治理不是一整套规则条理，也不是一种活动，而是一个过程。
B. 正确15.乡、民族乡、镇的人民政府对村民委员会的工作给予指导、支持和帮助，可以适当的干预依法属于村民自治范围内的事项。
A. 错误。