如图所示，一横截面为半圆柱形的玻璃砖，圆心为O，半径为R。某一单色光垂直于直径方向从A点射入玻璃砖，折射光线经过P点，OP与单色光的入射方向平行，且A到O的距离为，P到O的距离为，则玻璃砖对单色光的折射率为_________。若另有折射率n=2的单色光仍沿原方向从A点射入该玻璃砖，则单色光第一次到达玻璃砖面上_______（填“能”或“不能”）发生全反射。

A mother, Carrie Cort, 51, from Sussex, and her nine-year-old son have been named the UK’s most environmentally friendly family after winning an award for their environmental achievements.
Now every aspect of her life is environmentally friendly, from her son Adam’s birthday parties to her clothing, and she recycles everything from empty pens to milk bottle tops. “Changing our family lifestyle to green has saved us around £ 11, 000 every year, which has given us more financial stability,” Carrie says. “Living green has made us healthier and I feel younger now. It is fun seeing what you can make with unwanted or broken things. Growing your own food is great exercise, good for wildlife, and the food is much more nutritious and tastier.”
“My concern for the way we humans are treating the planet was really roused in 2008 when Adam was born. When he arrived, I suddenly had this huge, greater awareness of the kind of planet we’re bringing our children into though I learnt something about it in university.” She began going to talks, reading books, watching documentaries and attending green meetings in order to educate herself in the details of green living.
Carrie set up the local campaign group Sussex Green Living six years after her son’s birth. Later, she gave up her high-powered job, as she ran a video company with her brother, to do her job full-time. Today, she organizes talks and workshops. She runs a repair café, where people can bring everything to be fixed. Her recycling program helps people reuse wastes. Toothpaste tubes, for example, which Carrie sends to the Philippines, are turned into purses by an organization. “My goal is to inspire more people to lead greener, more environmentally friendly lives, to enable us to live in greater harmony with nature, now and for future organizations. I achieve this using various Sussex Green Living communication programs and working with other organizations who have the same goals and values.”
【1】How did Carrie feel about her environmentally friendly lifestyle?
A. unwanted. B. unhealthy. C. expensive. D. economical.
【2】Which of the following is true about Carrie?
A. She made good preparations for living green.
B. She recycled what people ignored for fun.
C. She does daily exercise by growing food.
D. She majored in planet protection in university.
【3】When did Carrie begin to form her environmentally friendly lifestyle?
A. After winning an award.
B. After giving birth to her son.
C. After being stuck in poverty.
D. After attending green meetings
【4】What does Carrie rely on to make her achievements?
A. Her repair café and workshops.
B. Her own programs and others’ work.
C. Her well-paid job and her brother’s support.
D. Her independence of realizing her green dream.

下面这段文字中有五处用词不当，请指出来并改正，使该文段语言表达准确，逻辑严密。
一所安静的学校，一间安静的教室，一个内心平静的教师和一群能自由思想的学生，是我们对基础教育的期待。学生可以通过接受基础教育养成良好习惯，学会学习，成为有智慧的人；虽然基础教育的任务仅仅是教会学生对付考试以升入高一级学校，那就无所谓“基础”，真正的教育也就无从谈起。学生成了考试机器，没有问题意识，缺乏批判思维，不关心社会，进而不思考自己的明天，这种“教育”，即使有社会风气支撑，教育者也不能认同。基础教育如果缺乏理想与智慧，等于没有教育；更危险的是基础教育如果违反常识，那么这种背离常识的教育就是“反教育”。目前最令人堪忧的是反常的“教育”变得堂而皇之。教育目的一旦被庸俗化，简约的教育内容就会被繁复的形式所替代，师生却疲于奔命，教育没有让人变得聪明，而且把人逼向愚昧；更令人困惑的，是人们无视愚蠢教育的危险性，而热切于不合实际的鼓噪。

听下面一段较长对话，回答以下小题。
【1】What has Kate's mother decided to do？
A. Return to school. B. Change her job. C. Retire from work.
【2】What did Kate's mother study at college？
A. Oil painting. B. Art history. C. Business administration.
【3】What is Kate's attitude toward her mother's decision?
A. Disapproving. B. Ambiguous. C. Understanding.

生产果汁时，用果胶酶处理果泥可提高果汁的出汁率。回答下列相关问题：
（1）某同学用三种不同的果胶酶进行三组实验，各组实验除酶的来源不同外，其他条件都相同，测定各组的出汁量，据此计算各组果胶的活性的平均值并进行比较。这一实验的目的是___________________。
（2）现有一种新分离出来的果胶酶，为探究其最适温度，某同学设计了如下实验：取试管16支，分别加入等量的果泥、果胶酶、缓冲液，混匀，平均分为4组，分别置于0 ℃、5 ℃、10 ℃、40 ℃下保温相同时间，然后，测定各试管中的出汁量并计算各组出汁量的平均值。该实验温度设置的不足之处有____________和_________________________。
（3）某同学取5组试管（A～E）分别加入等量的同种果泥，在A、B、C、D、4个实验组的试管中分别加入等量的缓冲液和不同量的同种果胶酶，然后，补充蒸馏水使4组试管内液体体积相同；E组加入蒸馏水使试管中液体体积与实验组相同。将5组试管置于适宜温度下保温一定时间后，测定各组的出汁量。通过A～D组实验可比较不同实验组出汁量的差异。本实验中，若要检测加入酶的量等于0而其他条件均与实验组相同时的出汁量，E组设计_________（填“能”或“不能”）达到目的，其原因是__________________________。

2018年1月25日，克隆猴“中中”和“华华”登上《细胞》杂志封面，这意味着我国科学家成功突破了现有技术无法克隆灵长类动物的世界难题。请回答下面的问题：
（1）“中中”和“华华”的培育涉及到的胚胎工程技术有_________。
（2）对猴体细胞进行培养时，须现将组织分散成许多单个细胞，原因是________。为了保证无菌，除了对培养液和所有培养用具进行无菌处理，还需要_________，以防培养过程中的污染。此外，还需要______的气体条件。
（3）进行核移植时，需要将猴体细胞核取出后，注入________期的去核卵母细胞。去除卵母细胞核的常用方法是__________。
（4）克隆灵长类动物的重要意义在于________。

类比推理是根据两个或两类对象有部分属性相同，从而推出它们的其他属性也相同的推理。下面是某寝室同学间的一次谈话，请你替甲同学就乙同学类比推理中存在的破绽写一段反驳的话，补写在横线上。要求：符合逻辑，语言简明、连贯、得体。
甲：乙同学，你的脾气能否改一改呢？不要动不动就乱发牌气。
乙：发怒是人类宣泄情感的必要方式。就像水库蓄水过量，就必得泄洪，否则就会造成决堤，危害四方；人的愤怒情绪过分压抑，也会造成情感决堤，危害自身和别人。
甲：____________________________________________________。
乙：其实我明白这个道理，就是有时候控制不住，也谢谢你的建议，以后我会注意的。

如图甲所示，沿波的传播方向上有六个质点a、b、c、d、e、f，相邻两质点之间的距离均为2 m，各质点均静止在各自的平衡位置，t=0时刻振源a开始做简谐运动，取竖直向上为振动位移的正方向，其振动图象如图乙所示，形成的简谐横波以2 m／s的速度水平向右传播，则下列说法正确的是_________。

A．波传播到质点c时，质点c开始振动的方向沿y轴正方向
B．0～4 s内质点b运动的路程为12 cm
C．4～5 s内质点d的加速度正在逐渐减小
D．6 s时质点e第一次回到平衡位置
E．各质点都振动起来后，a与c的振动方向始终相同

5．根据下面图表，用简洁的语言说明2017年浙江省高考选考是如何进行赋分的，并用一句话着重说明考生的赋分主要取决于什么。（5分）

                                                                                   

                                                                                   

下列有关水和无机盐的叙述，错误的是
A. 生命体中无机盐多以离子形式存在，人体流失钙离子容易出现抽搐现象
B. 处于休眠状态的水稻种子中通常不含水分
C. 缺铁性贫血是因为体内缺乏铁，血红蛋白不能合成
D. 植物中自由水的相对含量降低时，代谢减弱

下列关于种群、群落、生态系统的叙述，正确的是(　　)

A．一般来说，生态系统的组分越多，食物网越复杂，其自我调节能力就越强，抵抗力稳定性就越高

B．种群增长的“S”型和“J”型曲线都是在K/2时种群数量增长最快

C．群落演替过程中其结构越来越复杂，将来一定能形成森林

D．调查某地蒲公英的种群密度时，所选择的样方数不影响调查结果

为贯彻新发展理念，天津这座创造过无数个 “ 第一 ” 的老工业城市主动作为，以壮士断腕的决心，关停整治两万多家 “ 散乱污 ” 企业，组建智能科技、生物医药、新能源新材料等战略性新兴产业集群，让天津成为高新科技企业的集聚地。天津的做法旨在（    ）

A ．坚持共享发展，多谋民生之利

B ．创新发展方式，推动经济高速发展

C ．坚持制造业立市，打造特色城市

D ．优化产业结构，提升经济发展质量

墨子说：“视人之国，若视其国；视人之家，若视其家；视人之身，若视其身。”英国诗人约翰•多恩说：“没有人是自成一体、与世隔绝的孤岛，每一个人都是广袤大陆的一部分。”

“青山一道同云雨，明月何曾是两乡。”“同气连枝，共盼春来。”……2020年的春天，这些寄言印在国际社会援助中国的物资上，表达了世界人民对中国的支持。

“山和山不相遇，人和人要相逢。”“消失吧，黑夜！黎明时我们将获胜！”……这些话语印在中国援助其他国家的物资上，寄托着中国人民对世界的祝福。

“世界青年与社会发展论坛”邀请你作为中国青年代表参会，发表以“携手同一世界，青年共创未来”为主题的中文演讲。请完成一篇演讲稿。

要求：结合材料内容及含意完成写作任务；选好角度，确定立意，明确文体，自拟标题；不要套作，不得抄袭；不得泄露个人信息；不少于800字。

下图为高等动物细胞结构示意图，下列相关叙述正确的是

A．结构①的数量倍增发生于分裂前期的细胞中

B．具有单层生物膜的结构②与细胞分泌活动有关

C．RNA和RNA聚合酶穿过结构③的方向相同

D．④、⑤处的核糖体均由RNA和蛋白质组成

I never soon the night nor seen a star; I’ve seen neither spring nor fall nor winter. I was born at the end of the Reining Age(刹车时代), just as the Earth’s rotation(旋转)was coming to a final stop.
The Reining lasted for 42 years, three years longer than the Unity Government had planned. My mother once told me about the time our family witnessed the last sunset. The Sun had ever so slowly crept toward the horizon, almost as if it had stopped moving altogether. In the end, it took three days and three nights to finally set. Naturally, that was the end of all “days” and all “nights”. The Eastern Hemisphere(半球)was covered in weak light for a long time then, perhaps for a dozen years or so - with the Sun hiding just beyond the horizon - its rays reflected by half of the sky. It was during that long sunset that I was born.
Dusk did not mean darkness. The Northern Hemisphere was lit up by the Earth Engines. These giant engines had been raised all across Asia and North America; only the solid plates beneath those two continents could resist the great pushing forces they exerted. There were about 12,000 Earth Engines built and distributed across the Asian and American plains.
From my home 1 could see the bright plasma plumes(等离子气柱)of several hundred Earth Engines. Just imagine a titanic palace, one as large as the Parthenon on the Acropolis. Now imagine countless titanic pillars rising from that palace, reaching to the heavens, each releasing brilliant, bluish-white light like a titanic shining tube. And then there is you; you are a microbe on the palace’s floor. This only begins to paint the picture of the world we lived in.
This picture, however, is not yet complete. In order to survive the melting temperature of the expanding sun, we have to push the Earth away from it. First, the Earth must be stopped from rotating. Only the forces acting tangentially(正切地)to the Earth’s rotation could slow it, so the Earth Engines had to be built to a specific angle. Those gigantic pillars of light were leaning to that angle. Now imagine what that meant for our palace, with its pillars all leaning on the point of falling down! Many who came from the Southern Hemisphere went mad when suddenly seeing this awesome view.
Worse than the view was the burning heat released by the Earth Engines. Outdoors the temperature was stuck at around 160 to 180 degrees, forcing us to wear special suits just to leave the house. The extremely high temperatures often brought pouring rains. It was always a terrifying scene when the beam of an Earth Engine cut through dark clouds. The clouds scattered the brilliant, bluish-white light of the beam, erupting it into endless rainbow light that covered the entire sky like white-hot magma(岩浆).
To my generation, born in the Northern Hemisphere, all of this was perfectly normal and natural, just like the Sun, stars and Moon had been to generations before the Reining Age. We called the entire history of the human race that had come before us the Pre-Solar Age; what a fascinating and golden era that had truly been!
The Reining Age left the earth with a horrifying result. The sea tides, quickened by the Earth Engines, had swallowed two out of every three cities in the Northern Hemisphere; then the global increase in temperatures melted the polar icecap, resulting in floods that spread to the Southern Hemisphere. Thirty years earlier my grandfather had witnessed giant 300-foot waves that had engulfed Shanghai. Even now, he could never tell us about it without his gaze slipping into a thousand-mile stare.
Our planet had already changed beyond recognition before it even set out on its journey. Who knew what hardships were waiting for us on our long travels through outer space?
【1】What happened when the author was born?
A. The earth had stopped turning for forty-two years.
B. The sun was making its last fall towards the horizon.
C. All the Earth Engines had not been finished.
D. His family were suffering from the summer hotness.
【2】Which of the following about the Earth Engines is right?
A. They were built in Asia and North America due to their huge number and weight.
B. Their light and heat provided necessary energy for people to survive.
C. They were all built to point straight upward to the sky to stop the earth rotating.
D. Their existence brought both opportunities and inconvenience to people on the earth.
【3】What can we infer from the last three paragraphs?
A. People born in the Southern Hemisphere could enjoy four different seasons.
B. The author missed his Pre-Solar Age lifestyle very much.
C. Grandfather would never forget the scene of Shanghai being swallowed.
D. The author was discouraged but optimistic about the future of the earth.
【4】In this excerpt(节选)we can clearly see that the author is good at __________.
A. describing mental activities B. visualizing vivid scenes
C. doing experimental analysis D. expressing personal belief
【5】This excerpt is a part of __________.
A. a documentary novel B. an academic essay
C. a scientific research report D. a science fiction
【6】What is the best title of this chapter?
A. The Last Sunset. B. The Earth Engines. C. The Reining Age. D. The Post-Solar Life.

改错：(2020·石家庄市重点高中高三毕业班摸底考试)Therefore, the Monkey King as a symbol of being brave and determined is deeply loved by our Chinese.

________________________________________________________________________

2018年3月I5日，中国人民政治协商会议第十三届全国委员会第一次会议在中共中央高度重视下，在各有关方面大力支持下，经过全体委员共同努力，圆满完成各项议程，胜利闭幕。关于人民政协，理解正确的是
①人民政协是国家监督机关，积极履行民主监督的职贵
②人民政协是专门协商机构，建言不决策、参政不行政
③政治协商是人民政协必须恪守的根本政治原则和活动准则
④人民政协是人民民主的重要实现形式和协商民主的重要渠道
A. ①③ B. ①④ C. ②③ D. ②④

下表所示为2016年和2017年部分国家货币对人民币的汇率。根据表中数据，在不考虑其他影响因素的情况下，与2016年相比，2017年

	2016年11月11日	2017年11月11日
1美元/人民币	6.8115	6.6369
1英镑/人民币	8.5411	8.7283
1欧元/人民币	7.4071	7.7275

A. 中国商品出口美国更具价格优势
B. 中国投资者去英国进行投资更有利
C. 中国居民到欧元区旅游更不划算

下列关于人体的有丝分裂和减数分裂的叙述中,正确的是(　　)

A.减数分裂过程中非姐妹染色单体交叉互换导致卵细胞中的染色体均为非同源染色体

B.人的睾丸中既可观察到染色体数目加倍的细胞,也能观察到染色体数目减半的细胞

C.每个细胞分裂时同源染色体都进行联会且细胞分裂后形成的子细胞中都含有性染色体

D.减数第二次分裂前期与有丝分裂前期的染色体组数目和核DNA分子数目完全相同

函数的图像在点处的切线方程为（    ）

A.                                                           B.

C.                                                             D.