Happiness means different things to different people. For Mary, who has severe sleeping problem, happiness is as simple as having a good night's sleep.

    Bed was once a place Mary went to rest after a long, hard day. , she has not had a full night's sleep in almost six months. Her doctor said that (count) sheep might help her fall asleep. She tried this, but soon got tired of it after it failed to work. She finds the nights without sleep almost (bear) . She is always sleepy and lacks energy during the day.

    Mary is not alone. Studies show that more than one in three people worldwide struggle with getting enough sleep. It often takes on different (form) : some people can get to sleep, but wake up much too early; some get a full night's sleep, but are (disappoint)  to find that they still feel tired when they wake up; others, like Mary, find difficult to fall asleep in the first place.

    Specialists say that people should not worry too much about this problem. In most cases , a lack of sleep (cause) by anxiety and pressure. It is important to keep yourself good spirits and to be positive. 

材料一：

在新经济快速发展的背景下，“直播带货”尤其是“网红带货”成了电商新风口。所谓“直播带货”，是指通过一些互联网平台，使用直播技术进行近距离商品展示、咨询答复、导购的新型服务方式，或由店铺自己开设直播间，或由职业主播集合进行推介。一方面，“直播带货”互动性更强、亲和力更强，消费者可以像在大卖场一样，跟卖家进行交流甚至讨价还价；另一方面，“直播带货”往往能做到全网最低价，它绕过了经销商等传统中间渠道，直接实现了商品和消费者对接。特别是对网红主播而言，直播的本质是让观众们看广告，需要通过“秒杀”等手段提供最大优惠力度，才能吸引消费者，黏住消费者。

（摘自《“直播带货”亟待规范化》《南方日报》2020年4月3日）

材料二：

最近，中央政治局召开会议强调，“保持线上新型消费热度不减”。“直播带货”、线上团购、在线教育……疫情防控期间，线上新型消费方式不断涌现，在一定程度上弥补了线下消费的不足，起到了扩内需、促消费的作用，并展现出强大的生命力。随着“直播带货”开始流行，更多用户涌入直播间，尝鲜直播购物；更多企业家与创业者也开始捕捉新的消费热点和商机。

除了营销技巧之外，“直播带货”的流行也有着深层次原因。直播经济蓄力已久，已有成熟的商业模式；再加上受疫情影响，消费者足不出户推动“宅经济”发展，线下客源稀少促进企业商家转向电子商务谋生存。从直播助农到直播售楼，从直播卖车到直播卖飞机，直播销售的边界不断扩大。直播经济的火热，可谓顺势而成。

放在疫情防控大背景下来看，推动线上新型消费发展，实现线上线下相融合，对提振经济动能具有非常重要的意义。随着国外疫情持续扩散蔓延，世界经济贸易增长受到严重冲击，我们必须立足于扩大内需、促进消费来应对外部环境变化、稳定经济增长。这就要求把复工复产与扩大内需结合起来，把被抑制、被冻结的消费释放出来，把在疫情防控中催生的新型消费、升级消费培育壮大起来，使实物消费和服务消费得到回补。在这方面，培育以“直播带货”为代表的线上新型消费发挥着重要作用，需要政府部门与电商平台共同为直播经济涵养良好生态，以“直播带货”为突破口带动更多消费。

（摘自《“直播带货”创新消费方式》《人民日报》2020年04月22日05版）

材料三：

日前，中消协发布的《直播电商购物消费者满意度在线调查报告》显示，受访消费者对主播夸大和虚假宣传、用不能说明商品特性的链接在直播间售卖等问题意见较多。

对此，专家提醒，越是红火的产业，越要警惕被流量反噬，对直播带货行业而言更是如此。

如今，平台的多元化给直播带货提供了更多可能，但也加大了电商直播行业的管理难度。专家指出，规范直播带货，重点是规范商品。对直播售卖的产品要建立严格的准入制度，避免“线下卖不出的线上卖”，通过加强日常监管、消费者投诉受理等，杜绝有安全隐患、假冒伪劣、质量不达标的商品进入直播清单。

朱巍认为，直播带货要以质量取胜，直播平台要始终把消费者利益放在第一位，从供应链、流通链等全链条进一步健全消费者权益保障机制。

“要引导直播电商行业健康有序发展，既要推进社会共治，严厉打击各类违法违规行为，也要强化监管，明确直播电商经营者特别是直播电商平台经营者责任义务。尤其要聚焦关键节点，加强对主播群体的规范管理。”朱巍说。

（摘自《直播带货，流量取胜还是质量取胜》《光明日报》2020年4月30日）

The Uniqueness of Finger-prints (指纹的唯一性)

    Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable. Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the case.

    The ridge structure on a person's fingers does not change with growth and is not affected by surface injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time by new one, which bears a reproduction of the original pattern. It is only when the inner skin is injured that the arrangement will be destroyed. Some criminals make use of this fact to remove their own finger-prints but this is a dangerous and rare step to take.

    Finger-prints can be made very easily with printer's ink. They can by recorded easily. With special methods, identification can be achieved successfully within a short time. Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case. A suspected man may deny a charge but this may be in vain. His finger-prints can prove who he is even if his appearance has been changed by age or accident.

    When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect with the naked eye. Special techniques are used to “develop” them. Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained.

Choose the best answers according to the above:

材料一：

近日，加拿大视频博主柯克·阿佩兰（Kirk Apesland）在中国隔离期间发布的一则视频火了！自疫情爆发以来，西方媒体歪曲事实的报道层出不穷。在广西南宁隔离第十一天的柯克·阿佩兰决定在自己的视频节目Gweilo 60上揭批外煤。“我试图向大众解释，这些西方媒体没有告诉他们真相。”

材料二：

我们每天都会接触大量信息，这能帮助我们更好地认识周围世界，但有时我们获取的信息并不都是真实的，特别是网络上发布的信息常常会有错误。《吕氏春秋·察传》有言：“闻而不审，不若无闻矣”。因此，有辨识信息的自觉与能力，能够分辨各种媒介信息的真伪，就成了当代人必须具备的媒介素养。

请综合上述材料，结合自己 生活经验和思考，写一篇发言稿，在“提高媒介素养，适应信息时代”主题班会上发言，表达你的看法。

要求：选准角度，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。

声声慢

李清照

寻寻觅觅，冷冷清清，凄凄惨惨戚戚。乍暖还寒时候，最难将息。三杯两盏淡酒，怎敌他、晚来风急！雁过也，正伤心，却是旧时相识。

满地黄花堆积，憔悴损，如今有谁堪摘！守着窗儿，独自怎生得黑！梧桐更兼细雨，到黄昏、点点滴滴。这次第，怎一个愁字了得！

    Facebook CEO Zuckerberg just had a baby girl named Max, and to honor the occasion, he's giving away the majority of his wealth．In the letter (write) by Zuckerberg and his wife, Priscilla Chan, to (they) new baby girl, he announced the birth of his first child and the (create) of the Chan Zuckerberg Fund, will focus on curing disease, connecting people and (build) strong communities．

    “For your generation to live in better world, there is so much more our generation can do,” Zuckerberg wrote．“Today your mother and I are committing to spend our lives doing our small part to help solve these challenges．” The couple (donate) nearly all of their Facebook stock to the cause．“We will give 99% of our Facebook shares － currently about $45 billion － to advance this (value) mission,” he wrote．“We know this is a small contribution compared all the resources and talents already working on these issues．But we want to do we can, working along with many others．

《咬文嚼字》编辑部评选出2020年度十大流行语，它们分别是人民至上、生命至上（这两个词语算一个），逆行者，飒，后浪，神兽，直播带货，双循环，打工人，内卷，凡尔赛文学。

你熟悉其中哪些流行语？请从中选择两个流行语来呈现你眼中2020年的中国，表达你对前进中的国家的认识。

要求：明确你选择的流行语，使之形成有机的关联；选好角度，明确文体，自拟标题；不要套作，不得抄袭，不少于800字。

     One rainy day while I was walking home with one of my friend, a truck came to a stop besides us. The driver put the window down and offered us a umbrella because he found we were wet through. I stood there and couldn't believe in that a complete stranger is so thoughtful. The man insisted, so I grateful accepted the offer, thanked him and watched the truck disappear down the road. This man might need the umbrella himself, and he preferred to give it to everyone else. It was a lesson to us that it is possible give without expect anything in return.

（Ⅰ）试写出线性变换σ对应的二阶矩阵A；

（Ⅱ）求矩阵A的特征值及属于相应特征值的一个特征向量．

淮上^①喜会梁州^②故人

韦应物

江汉曾为客，相逄每醉还。

浮云一别后，流水十年间。

欢笑情如旧，萧疏鬓已斑。

何因不归去？淮上有秋山^③。

注释：①淮上：淮水边，今江苏淮阴一带。②梁州：指兴元府，今陕西汉中市。③淮上有秋山：诗人曾有《登楼》诗云：“坐厌淮南守，秋山红树多。