下列有关化工生产不涉及化学变化的是( )
A. 合成氨 B. 煤干馏 C. 海带提碘 D. 石油分馏

若复数，则在复平面内，对应的点所在象限是（ ）
A. 第一象限 B. 第二象限 C. 第三象限 D. 第四象限

如图甲所示，A、B两绝缘金属圆环套在同一水平铁芯上，A环中电流i_A随时间t的变化规律如图乙所示。下列说法正确的是(　　)

A．t₁时刻，两环之间作用力最大

B．t₂和t₃时刻，两环相互吸引

C．t₂时刻两环相互吸引，t₃时刻两环相互排斥

D．t₃和t₄时刻，两环相互吸引

如图所示，匀强磁场的磁感应强度大小为B．磁场中的水平绝缘薄板与磁场的左、右边界分别垂直相交于M、N，MN=L，粒子打到板上时会被反弹（碰撞时间极短），反弹前后水平分速度不变，竖直分速度大小不变、方向相反．质量为m、电荷量为-q的粒子速度一定，可以从左边界的不同位置水平射入磁场，在磁场中做圆周运动的半径为d，且d<L，粒子重力不计，电荷量保持不变。
（1）求粒子运动速度的大小v；
（2）欲使粒子从磁场右边界射出，求入射点到M的最大距离dm；
（3）从P点射入的粒子最终从Q点射出磁场，PM=d，QN=，求粒子从P到Q的运动时间t．

(2017·江苏高考)请认真阅读下面有关我国电影票房收入(box­office income)的柱状图及相关文字，并按照要求用英语写一篇150词左右的文章。

Saturday Afternoon. In a Shopping Centre.

Li Jiang：Hi, Su Hua.Which movie shall we see?

Su Hua：Whatever. We've got so many choices, Kung Fu Yoga, Journey to the West ... Each sounds great!

Li Jiang：Yeah！And some movie stars are fantastic.

Su Hua: And the high­tech! ...

Li Jiang：Perfect！Let's get some food first.We only have 20 minutes left.

Su Hua：No hurry.The cinema is on the same floor.

One Day in 2016. At Home.

Son：Mum, shall we go and see a film tonight?

Mother：Why bother? We can stay at home and watch films online. It's convenient with our new and faster network.

Son：But it feels good in a cinema.

Mother：And the price ... We have to pay 50 yuan a ticket.

Son：Only 10 yuan more than last year.

Mother：But still we cannot get the money's worth.Some films are just boring ...

【写作内容】

1．用约30个单词概述柱状图信息的主要内容；

2．我国电影票房收入变化的原因有哪些，简要谈谈你的看法(上述对话仅供参考，原因不少于两点)；

3．谈谈你对我国电影票房收入走向的看法，并简要说明理由。

【写作要求】

1．写作过程中不能直接引用原文语句；

2．作文中不能出现真实姓名和学校名称；

3．不必写标题。

【评分标准】

内容完整，语言规范，语篇连贯，词数适当。

　

近年来，我国价格改革不断深化，取得显著成效。竞争性领域和环节价格基本放开，政府定价范围主要限定在重要公共事业、公益性服务、网络型自然垄断环节，97%的商品和服务价格由市场决定；价格监督检查和反垄断工作实绩斐然，价格调控机制进一步健全。价格改革不断深化的影响是
①竞争性领域价格基本放开→完善市场决定价格的机制→促进资源优化配置　
②政府对公共事业等环节定价→提高从业人员工作积极性→扩大公共服务规模　
③健全政府价格调控机制→理顺政府与市场的关系→防止政府对微观经济的干预　
④推进价格监管和反垄断工作→形成良好市场秩序→促进经济健康发展
A. ①② B. ③④ C. ②③ D. ①④

(2018·全国卷Ⅲ)That makes her baby scream, and then a 400­pound male appears. He screams the ________ (loud) of all.

“凡往见人，入门必问主人食否”原是北宋时的乡约，说的是不管到谁家去，进门先要问吃了没有，以示对主人的尊重。明朝《泰泉乡礼》沿用了这条乡约，到了清朝，“吃了吗”已成为流行的交往礼仪和习惯，并延续至今。由此可见（    ）

①乡约是在人们的实践中形成和发展的          ②乡约礼仪是历史文化成就的重要标志

③人们创造礼仪文化的同时也被它塑造          ④文化决定人们的交往行为和交往方式

A. ①②                B. ①③                C. ②④                D. ③④

下列与细胞结构和功能有关的说法,错误的是(　　)

A.有的生物膜上除了含有磷脂和蛋白质分子外,还含有色素分子

B.在胰岛B细胞中合成的胰岛素需要通过有关细胞器的加工才具有生物活性

C.若细胞膜上某种蛋白质的结构发生变化可能会影响物质的跨膜运输

D.体检时若发现甲胎蛋白呈阴性可能预示体内存在癌细胞

已知月球半径为R，飞船在距月球表面高度为R的圆轨道上飞行，周期为T，万有引力常量为G，下列说法正确的是 ( )
A. 月球质量为
B. 月球表面重力加速度为
C. 月球密度为
D. 月球第一宇宙速度为

各项均为正偶数的数列中，前三项依次成公差为的等差数列，后三项依次成公比为的等比数列.若,则的所有可能的值构成的集合为________.

The Homeless Hero
For many, finding an unattended wallet filled with £400 in cash would be a source（来源）of temptation（诱惑）. But the ______ would no doubt be greater if you were living on the streets with little food and money. All of this makes the actions of the homeless Tom Smith ________ more remarkable.
After spotting a _______ on the front seat inside a parked car with its window down, he stood guard in the rain for about two hours waiting for the ________ to return.
After hours in the cold and wet, he _________ inside and pulled the wallet out hoping to find some ID so he could contact（联系）the driver, only to ________ it contained £400 in notes, with another £50 in spare change beside it.
He then took the wallet to a nearby police station after ________ a note behind to let the owner know it was safe. When the car’s owner John Anderson and his colleague Carol Lawrence returned to the car—which was itself worth £35, 000—in Glasgow city centre, they were ________ to find two policemen standing next to it. The policemen told them what Mr. Smith did and that the wallet was ________.
The pair were later able to thank Mr. Smith for his ________.
Mr. Anderson said：＂I couldn’t believe that the guy never took a penny. To think he is sleeping on the streets tonight ________ he could have stolen the money and paid for a place to stay in. This guy has nothing and
________ he didn’t take the wallet for himself；he thought about others ________. It’s unbelievable. It just proves there are ______ guys out there.＂
Mr. Smith’s act ________ much of the public’s attention. He also won praise from social media users after Mr. Anderson ________ about the act of kindness on Facebook.
Now Mr. Anderson has set up an online campaign to _________ money for Mr. Smith and other homeless people in the area, which by yesterday had received ￡8,000. ＂I think the faith that everyone has shown ________ him has touched him. People have been approaching him in the street; he’s had job ________ and all sorts,＂ Mr. Anderson commented.
For Mr. Smith, this is a possible life-changing ________. The story once again tells us that one good turn deserves another.
【1】A. hope B. aim C. urge D. effort
【2】A. still B. even C. ever D. once
【3】A. wallet B. bag C. box D. parcel
【4】A. partner B. colleague C. owner D. policeman
【5】A. turned B. hid C. stepped D. reached
【6】A. discover B. collect C. check D. believe
【7】A. taking B. leaving C. reading D. writing
【8】A. satisfied B. excited C. amused D. shocked
【9】A. safe B. missing C. found D. seen
【10】A. service B. support C. kindness D. encouragement
【11】A. when B. if C. where D. because
【12】A. rather B. yet C. already D. just
【13】A. too B. though C. again D. instead
【14】A. honest B. polite C. rich D. generous
【15】A. gave B. paid C. cast D. drew
【16】A. learned B. posted C. cared D. heard
【17】A. borrow B. raise C. save D. earn
【18】A. of B. at C. for D. in
【19】A. details B. changes C. offers D. applications
【20】A. lesson B. adventure C. chance D. challenge

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过8个字。

食物的基本功能之一是给人体提供日常所需的能量。我们的一举一动，大到跑步，小到眨眼，①___________。食物中提供能量的三大营养素，即蛋白质、碳水化合物和脂防，人体不能②_________，因为它们均以大分子形式存在，必须消化分解成小分子才能吸收利用。这一过程中的能量消耗就是_③____________，又称为膳食生热作用，我们吃完饭后会有发热的感觉，这就是食物热效应的外在表现。

1628年，英国议会通过了“权利请愿书”，规定：国王不经议会同意不得征收捐税，不出示具体罪证不得任意捕人，和平时期不能随意实行军事法，不得任意在居民家中驻军等。这一请愿书
A. 实行了权力中心的转移
B. 奠定君主立宪制的法律基础
C. 导致国王“统而不治”
D. 为《权利法案》提供蓝本

科学家发现银河系中存在大量的放射性同位素铝 26 。 铝 26的半衰期为 72 万年,其衰变方程为 ，下列说法正确的是 (   )

A . Y 是氦核

B. Y 是质子

C . 再经过 72 万年,现有的铝 26 衰变一半

D . 再经过 14 4 万年，现有的铝 26 全部衰变

阅读下面材料，在空白处填入适当的内容（1 个单词）或括号内单词的正确形式。
Confucianism (儒家思想), 【1】 (develop) from thoughts by Confucius during the Spring and Autumn Period, is a philosophical system which has become 【2】 important part of Chinese culture. It was first set up by Confucius (551–479 BC) and later was developed by philosophers, including Mencius, Dong Zhongshu, Wang Yangming and others.
Confucianism means a lot not only to China, but also to the world. In 1988, 75 Nobel prizewinners said that 【3】 mankind is to survive it must go back 25 centuries in time to tap the 【4】 (wise) of Confucius. Today, sentences from Confucianism are 【5】 (frequent) heard in speeches or talks given by famous foreign people. Besides, people around the globe can have access 【6】 Confucius ideas in Confucius Institutes and Chinese Culture Centers abroad. The institutes and centers serve as non-profit public institutions to help foreigners 【7】 (well) understand China than before through language teaching and culture introduction.
So far China 【8】 (open) 465 Confucius Institutes in 123 countries and regions. There are also 713 Confucius Classrooms operating in middle and primary schools. What’s more, Chinese Culture Centers in Cairo, Paris, Berlin, Tokyo and Denmark, to name a few, are introducing China by holding cultural 【9】 (activity), opening training classes, and 【10】 (build) libraries.

下面是某高校自主招生办公室致考生的一封信，其中有五处表达不妥当的地方，请找出并作修改，要求语言表达准确、得体、连贯。
致考生的一封信
尊敬的各位考生：
欢迎参加鄙校2019年度高考自主招生考前选拔工作。请在参加自主招生选拔前，及时登录网站（gaokao．chsi．com．cn），了解自主招生政策及实施方案。考生必须使用网站招生系统进行注册、查询选拔状态、填报志愿组合，并确认有效志愿。因条件所限，招生系统还有许多需要不断完善的地方，感谢您的宽恕和支持！
预祝各位考生顺利！
中国某高校自主招生办公室
2018年3月10日

Essentially, everyone has two ages: a chronological（按时间计算的）age, how old the calendar says you are, and a biological age, basically the age at which your body functions as it compares to average fitness or health levels.
“Chronological age isn’t how old we really are. It’s merely a number,” said Professor David Sinclair at Harvard University. “It is biological age that determines our health and ultimately our lifespan. We all age biologically at different rates according to our genes, what we eat, how much we exercise, and what environment we live in. Biological age is the number of candles we really should be blowing out. In the future, with advances in our ability to control biological age, we may have even fewer candles on our birthday cake than the previous one.”
To calculate biological age, Professor Levine at Yale University identified nine biomarker（生物标志）that seemed to be the most influential on lifespan by a simple blood test. The numbers of those markers, such as blood sugar and immune（免疫的）measures, can be put into the computer, and the algorithm（算式，算法）does the rest.
Perhaps what’s most important here is that these measures can be changed. Doctors can take this information and help patients make changes to lifestyle, and hopefully take steps to improve their biological conditions. “I think the most exciting thing about this research is that these things aren’t set in stone,” Levine said. “People can be given the information earlier and take steps to improve their health before it’s too late.”
Levine even entered her own numbers into the algorithm. She was surprised by the results. “I always considered myself a very healthy person. I’m physically active; I eat what I consider a fairly healthy diet. But I did not find my results to be as good as I had hoped they would be. It was a wake-up call,” she said.
Levine is working with a group to provide access to the algorithm online so that anyone can calculate their biological age, identify potential risks and take steps to improve their own health in the long run. “No one wants to live an extremely long life with a lot of chronic（慢性的）diseases,” Levine said. “By delaying the development of mental and physical functioning problems, people can still be engaged in society in their senior years. That is the ideal we should be pursuing.”
【1】Biological age depends on .
A. whether we can adapt ourselves to the environment
B. how well our body works compared with our peers’
C. when we start to take outdoor exercise
D. what the calendar says about our age
【2】By saying “we may have even fewer candles on our birthday cake than the previous one” in Para. 2, the author means _______.
A. we don’t have to celebrate our birthday every year
B. we are chronologically older than last year
C. we might be less happy than the previous year
D. we may be biologically younger than the year before
【3】According to Prof. Levine, what is the most exciting thing about her research?
A. The measures are not fixed.
B. Health services can be set up.
C. The problems are not that serious.
D. The research results are written in stone.
【4】What does the author want to tell us by Levine’s example in Para. 5?
A. It is necessary to change our diet regularly.
B. The test results may give us wrong information.
C. Waking up early in the morning is good for our fitness.
D. The algorithm can reveal our potential health problems.
【5】The ultimate goal of Levine’s research is to .
A. free people from chronic diseases
B. work out a solution to genetic problems
C. keep people socially active even in old age
D. provide people with access to scientific theory

阅读下面的文字，完成各题。
在互联网 地发展中，相声毫无疑问发生了变化。我们该怎么看待这种变化呢?惊呼传统丧失殆尽，或看举双手欢迎一切改造，显然都 。我以为，首要者，是不要谈变色变。有人推業崇传统到唯传统至上，认为马三立、侯宝林等人都是 ，现在的演员再努力也难以 ，《夜行记》《关公战秦琼》等经典作品更是成为绝唱。事实上，对相声来说，很多所谓的传统选段都是经过几代人打磨才有今天的面貌，相声的传统，从来都是动态的而不是僵化的，是在适应中生存、与时俱进的。其二是变中取辨，对相声的变化应当仔细辨别。现在青年观众群体的兴趣、习惯都已经“互联网化”，( )，因而需要在贴近年轻人趣味方面借鉴形式多元的网络综艺节目，但借鉴吸收不代表就要变成“你的样子”，其关键在于平衡艺术传统与观众趣味，找准改良的突破口。变是常态，拥抱变北并且适应变化是我们对待事物发展的必然态度，但在变中坚守艺术传统，在变中尊重艺术规律，又是我们弘扬和继承传统艺术的必然坚持。期待相声等传统艺术祥式拿出新作品新风貌，在时代面前做一次洒脱漂亮的转型。
【1】下列在文中括号内补写的语句，最恰当的一项是
A. 作为一种曲艺形式，相声对比层出不穷的网络综艺节目显得“陈旧”不少
B. 相声作为一种曲艺形式，对比层出不穷的网络综艺节目显得“陈旧”不少
C. 作为一种曲艺形式，对比层出不穷的网络综艺节目，相声显得“陈旧”不少
D. 对比层出不穷的网络综艺节目，相声作为一种曲艺形式显得“陈旧”不少
【2】依次填入文章横线上的词语，最恰当的一项是
A. 日新月异 失之偏颇 凤毛麟角 望其项背
B. 蒸蒸日上 失之公允 吉光片羽 望其项背
C. 日新月异 失之公允 凤毛麟角 望尘莫及
D. 蒸蒸日上 失之偏颇 吉光片羽 望尘莫及
【3】文中画横线的部分有语病，下列修改最恰当的一项是
A. 但在变中坚守艺术传统，在变中尊重艺术规律，又是我们继承和弘扬传统艺术的必然坚持。
B. 但在变中尊重艺术规律，在变中坚守艺术传统，又是我们弘扬和继承传统艺术的必然坚持。
C. 但在变中尊重艺术规律，在变中坚守艺术传统，又是我们]继承和弘扬艺术传统的必然坚持。
D. 但在变中坚守艺术传统，在变中尊重艺术规律，又是我们弘扬和继承艺术传统的必然坚持。

阅读下面的文言文，完成下列小题
王檀，字众美，京兆人也。檀少英悟，美形仪，好读兵书，洞晓韬略。唐中和中，太祖镇大梁，檀为小将。四年，汴将杨彦洪破巢将尚让、李谠于尉氏门外，檀在战中，摧锋陷阵，遂为太祖所知，稍蒙擢用。光启二年，从胡真击淮西之众，解河阳之围。蔡贼张存敢乘乱据洛阳，檀与勇士数十人潜入贼栅，邀其辎重，存敢遁走。
大顺元年，从庞师古渡淮深入，讨孙儒之乱，夺部伯堰，破高邮军，檀奋命击贼，刃伤左臂。未几，迁顺义都将。天复中，从太祖率四镇之师围凤翔，以迎昭宗，屡立戎效，迁左踏白指挥使。从攻王师范于青州檀以偏师收复密郡遂权知军州事郡接淮戎旧无壁垒乃率丁夫修筑罗城六旬而毕居民赖之加检校司空，乾化元年正月，王景仁与晋人战于柏乡，王师败绩，河朔大震。景仁余众为敌骑所追，檀严设备，应接败军，助以资装，获济者甚众。俄而晋军大至，重围四合，土山地穴，昼夜攻击，太祖忧之。檀密上表，请驾不亲征，而悉力枝梧，竟全城垒。
贞明元年三月，魏博军乱。六月，晋王入魏州，分兵收下属郡，河北大扰，檀受诏与开封尹刘郓犄角进师，以援河北。檀攻澶州魏县，下之，擒贼将李岩、王开关以献。檀密疏请以奇兵西趣河中，自阴地关袭取晋阳，末帝许之，即驰兵而去。二年二月，师至晋阳，昼夜急攻其垒，并州几陷，既而藩将石家才自潞州以援兵至，檀引军大掠而还。寻授天平军副大使。先是，檀招诱群盗，选其劲悍者置于帐下，以为爪牙。至是，数辈窃发，突入府第，檀素不为备，遂为所害，时年五十一。
（选自《旧五代史・王檀传》）
【1】下列对文中画波浪线部分的断句，正确的一项是（）
A. 从攻王师范于青州／檀以偏师收复／密郡遂权知军州事/郡接淮戎／旧无壁垒／乃率丁夫修筑罗城／六旬而毕居／民赖之／加检校司空
B. 从攻王师范于青州／檀以偏师收复／密郡遂权知军州事／郡接淮戎／旧无壁垒／乃率丁夫修筑罗城六旬而毕／居民赖之／加检校司空
C. 从攻王师范于青州／檀以偏师收复密郡／遂权知军州事／都接淮戎／旧无壁垒／乃率丁夫修筑罗城／六旬而毕／居民赖之／加检校司空
D. 从攻王师范于青州／檀以偏师收复密郡／遂权知军州事／郡接淮戎／旧无璧垒／乃率丁夫修筑罗城/六旬而毕居／民赖之／加检校司空
【2】下列对文中加点词语的相关内容的解说，不正确的一项是（）
A. 京兆，古代某段时期将京城所在的地区称为京兆。
B. 太祖，庙号，亦称“大祖”，主要用于皇帝追授先祖。
C. 表，文中指古代的一种文体，给皇帝的书信、奏章。
D. 河北，古代指黄河以北地区。不同于现在的河北省。
【3】下列对原文有关内容的概括和分析，不正确的一项是（）
A. 王檀作战勇敢。大顺元年，他跟随庞师古渡过淮河深人敌境，讨伐孙儒的叛乱，奋力攻打贼军，被刀砍伤左臂。
B. 王檀屡次进谏。他请求太祖不要亲自出征，尽力抗拒；上书请求率领奇兵向西奔赴河中，从阴地关袭取晋阳
C. 王檀关心同僚。王景仁和晋人作战被打败，遭骑兵追击，他积极接应，资助其装备，救下了很多王景仁的部下。
D. 王檀富有胆略。他从被招诱过来的群盗中挑选凶悍的人，作为自己的帮手，这些人在其管束之下，不敢越轨
【4】把文中画横线的句子译成现代汉语。
（1）檀在战中，摧锋陷阵，遂为太祖所知，稍蒙擢用。
（2）檀与勇士数十人潜入贼栅，邀其辎重，存敢遁走。