Passage 1人口问题归根结底是发展问题。人口的急剧增长，社会经济的迅速发展，给资源和环境带来了空

调雨顺已被视为“奢侈品”。气象学家对此众说纷纭，莫衷一是。有的说是全球变暖所致，有的说是大气环流异常，还有的认为厄尔尼诺是罪魁祸首。

尽管如此，大多数学者都认同这样一个观点：全球气候变化速度正在加剧，极端灾害天气今后无疑将更加频繁，并且其强度和范围都将走强。面对日益脆弱的全球气候，人类需要更认真地思考，如何切实有效地规范自身活动，珍爱我们共同的家园。

未来极端事件将对与气候有密切相关的行业，如水利、农业、林业、能源、健康和旅游业等有更大影响。在世界经济发展不稳定性、不确定性上升的当下，上述因素为全球经济复苏带来更多变数。

国家。

虽然目前它的定位精度与GPS还有一定的差距，但它具备了GPS所没有的短报通信和位置报告的功能。在没有手机信号的地方，用户也可以通过该系统发送短信。

2008年四川汶川大地震后，灾区电话无法接通，手机信号中断。救援人员将北斗导航终端带入灾区，及时保持了与外界的通讯联络。

该系统的位置报吿功能可以帮助交通管理部门掌握行驶车辆的位置，及时疏导交通，缓解交通拥堵状况。

虽然北斗卫组导航系统时中国独立发展、自主运行的卫星导航系统，但这并不影响它与世界上其他卫星导航系统之间的兼容性。用户在同时使用北斗和GPS这两种导航系统时，定位和导航效果会更好。

r pumps to fix flat tires, footrests to lean on while taking breaks and trash cans that are specially angled, so you can throw in empty water bottles without stopping.

Best of all, you can cycle on those routes for long distances without having to make way for cars and trucks at junctions and traffic lights, according to the official description of the Cycle Super Highways, which are under construction here as part of the Danish capital’s efforts to become carbon-neutral by 2025. Are they as good as they sound? These days it is hard to find a big city that doesn’t make grandiose claims to encourage cycling, and harder still to find one that fulfills them. Redesigning congested traffic systems to add hike lanes to overcrowded roads is fiendishly difficult, especially in historic cities with narrow cobbled streets like Copenhagen. But as its cycling program sounds so ambitious, I went there to try it.

Maybe I’d be less cynical if I lived in Amsterdam, Cologne or any other city with decent cycling facilities. But as a Londoner, I’ve learned the hard way to be suspicious whenever politicians promise to do anything bike-friendly. London’s mayor, Boris Johnscoff, is a keen cyclist, who issues policy papers with auspicious titles like “Cycling Revolution” and has continued his predecessor’s biking program by introducing a cycle-rental project and building new bike lanes.

So far, so good. You may think, unless you have braved the potholes, parked trucks and construction debris that obstruct those lanes, many of which appear to have been designed by “someone who has never seen a bicycle, let alone ridden one.

Luckily for Copenhagen’s cyclists, their system has been more thoughtfully designed. The capital is a compact, reasonably flat city which is naturally bike-friendly, and even its old cycle routes are wider and better maintained than London’s. More than a third of Copenhageners already bike to work or school, mainly on short journeys of an average of 5 kilometers, or 3 miles.

The city’s traffic planners hope to encourage people to cycle for longer distances by creating the cycling equivalent of freeways, which will provide fast, direct routes of up to 22 kilometers into the center. A total of 28 highways are planned, providing 495 kilometers of dedicated bike tracks. The first one fromthe western suburb of Albertslund opened in April 2012, followed a year by the second, from Farum, northwest of the city.

What are the superhighways like? Judging by my experience of the Farum route, they’re great. Impressive though the air pumps, footrests and angled trash cans are, the biggest thrill was pedaling through the “green waves” of uninterrupted green traffic lights, which have been programmed to prioritize cyclists over cars.

It was also cheering to see bikers chatting while cycling two or three abreast in “conversation lanes.” Like most urban bikers, I usually value the practical benefits of cycling, as a speedy means of transport and convenient form. of exercise, but the Farum route made it as pleasurable as zipping along empty country lanes.

The planners hope the full network will eventually encourage a 30-percent increase in cycling among Copenhagen’s comments, which would be hugely beneficial in terms of reducing the city’s CO2 emissions and health care costs.

f to Picasso.

In a class at the company’s internal university, the instructor likened the 11 lithographs that make up Picasso’s The Dull to the way Apple builds its smartphones and other devices. The idea is that Apple designers strive for simplicity just as Picasso eliminated details to create a great work of art.

Steven P. Jobs established the Apple University as a way to inculcate employees into Apple’s business culture and educate them about its history, particularly as the company grew and the technical business changed. Courses are not required, only recommended, but getting new employees to enroll is rarely a problem.

Randy Nelson, who came from the animation studio Pixar, co-founded by Mr. Jobs, is one of the teachers of “Communicating at Apple.” This course, open to various levels of employees, focuses on clear communication, not just for making products intuitive, but also for sharing ideas with peers and marketing products.

In a version of the class taught last year, Mr. Nelson showed a slide of The Bull, a series of 11 lithographs of a bull that Picasso created over about a month, starting in late 1945. In the early stages, the bull has a snout, shoulder shanks and hooves, but over the iterations, those details vanish. The last image is a curvy stick figure that is still unmistakably a bull.

“You go through more iterations until you can simply deliver your message in a very concise way, and that is true to the Apple brand and everything we do,” recalled one person who took the course.

In “What Makes Apple, Apple,” another course that Mr. Nelson occasionally teaches, he showed a slide of the remote control for the Google TV, said an employee who took the class last year. The remote control has 78 buttons. Then, the employee said, Mr. Nelson displayed a photo of the Apple TV remote control, a thin piece of metal with just three buttons.

How did Apple’s designers decide on three buttons? They started out with an idea. Mr. Nelson explained, and debated until they had just what was needed — a button to play and pause a video, a button to select something to watch, and another to go to the main menu.

The Google TV remote control serves as a counterexample. It had so many buttons, Mr. Nelson said, because the individual engineers and designers who worked on the project all got what they wanted.

安全对有效应对国际金融危机冲击、推动世界经济全面复苏和长远发展具有重要意义。

国际社会应树立互利合作、多元发展、协同保障的新能源安全观，共同稳定能源等大宗商品价格、防止过度投机和炒作，保障各国特别是发展中国家能源需求，维护能源市场正常秩序。同时，各国应改善能源结构，加强先进能源技术的研发和推广，大力发展清洁和可再生能源，在相关领域积极开展国际合作。

中国政府高度重视能源和能源安全问题。在解决中国的能源问题上，始终坚持节约优先、立足国内、多元发展、保护环境的原则，加强国际互利合作，大力改善和调整能源结构，努力构筑稳定、经济、清洁、安全的能源供应体系。中国愿与世界各国一道共同努力，建立起能源合作长效机制，为保障全球能源安全、应对气候变化做出应有的贡献。

有11次与既有大国之间发生了对抗和战争。但现在的世界已今非昔比，中美之间乃至全球各国之间已是日趋紧密的利益共同体，对抗将是双输，战争没有出路。不冲突、不对抗的宣示，就是要顺应全球化潮流，改变对中美关系的负面预期，解决两国之间的战略互不信，构建对中美关系前景的正面信心。

相互尊重，是构建中美新型大国关系的基本原则。世界是多样的，中美作为两个社会制度不同、历史文化背景各异，同时又利益相互交织的大国，相互尊重就显得尤为重要。我们只有相互尊重对方人民选择的制度与道路，相互尊重彼此的核心利益与关切，才能求同存异，进而聚同化异，实现两国的和谐相处。

合作共赢，是中美构建新型大国关系的必由之路。中美双方在双边关系各领域都有着广泛合作需求和巨大合作潜力。此外，作为两个大国，环顾当今世界，从反恐到网络安全，从核不扩散到气候变化，从中东和平到非洲发展，也都离不开中美两国的共同参与、合作和贡献。

代以来中华民族的夙愿。

在新的历史时期，中国梦的本质是国家富强、民族振兴、人民幸福。我们的奋斗目标是，到2020年国内生产总值和城乡居民人均收入在2010年基础上翻一番，全面建成小康社会。到本世纪中叶，建成富强民主文明和谐的社会主义现代化国家，实现中华民族伟大复兴的中国梦。

实现中国梦，必须坚持中国特色社会主义道路。我们已经在这条道路上走了30多年，历史证明，这是一条符合中国国情、富民强国的正确道路，我们将坚定不移地沿着这条道路走下去。

实现中国梦，必须弘扬中国精神。用以爱国主义为核心的民族精神和以改革创新为核心的时代精神振奋起全民族的“精气神”。

实现中国梦，必须凝聚中国力量。空谈误国，实干兴邦。我们要用13亿中国人的智慧和力量，一代又一代中国人不懈努力，把我们的国家建设好，把我们的民族发展好。

实现中国梦，必须坚持和平发展。我们将始终不渝走和平发展道路，始终不渝奉行互利共赢的开放战略，不仅致力于中国自身发展，也强调对世界的责任和贡献;不仅造福中国人民，而且造福世界人民。实现中国梦给世界带来的是和平，不是动荡;是机遇，不是威胁。

空间技术研究院的简介，这一块需要大家平时多练习积累。

本公司是全球最大最强的冶金建设运营服务商，拥有24万在职员工，资产规模超7000亿元，境外机构、资源项目与承建工程遍布全球60多个国家和地区。

本公司有着独特的全产业链竞争优势，公司在全球金属矿业领域率先打通了从资源获取、勘查、设计、施工、运营到流通、深加工的全产业链，形成了为金属矿产企业提供系统性解决方案，和工程建设运营一体化全生命周期的服务能力。

公司金属矿产资源储量丰富，在国内外拥有一批世界级优质矿山。在冶金工业建设领域，公司积累了贯穿各环节的核心技术优势和设计施工能力，承担了中国大中型钢铁企业超过90%的设计施工任务和全球60%冶金建设任务，是冶金建设的“国家队”。公司拥有遍布全球的贸易流通网络，全球采购、全球营销，金属矿产品流通规模稳居国内第一。

Passage 2

本美术馆以收藏、研究、展示中国近现代至当代艺术家作品为重点的国家艺术博物馆，是新中国成立以后的国家文化标志性建筑。主体大楼为仿古阁楼式，黄色琉璃瓦大屋顶，四周廊榭围绕，具有鲜明的民族建筑风格。主楼建筑面积18000多平方米 ，共有17个展览厅，展览总面积8300平方米。

中国美术馆现收藏各类美术作品10万余件，以19世纪末至今中国艺术名家和各时期代表作品为主，兼有部分古代书画和外国艺术作品，同时也包括丰富的民间美术作品。

建馆以来，中国美术馆已举办数千场具有影响的各类美术展览，反映了中国美术繁荣发展的态势，也成为中国与国际艺术交流的重要平台。

中国美术馆也注重通过网站及“数字美术馆”项目建设延展公众服务内容和手段，网站3次改版，建成10多个美术数据库，日益成为美术信息发布、检索与共享平台。

Passage 2

Scientists have found the first evidence that briny water flowed on the surface of Mars as recently as last summer, a paper published on Monday showed, raising the possibility that the planet could support life.

Although the source and the chemistry of the water is unknown, the discovery will change scientists’ thinking about whether the planet that is most like Earth in the solar system could support present day microbial life.

The discovery was made when scientists developed a new technique to analyze chemical maps of the surface of Mars obtained by NASA’s Mars Reconnaissance Orbiter spacecraft.

They found telltale fingerprints of salts that form. only in the presence of water in narrow channels cut into cliff walls throughout the planet’s equatorial region. The slopes appear during the warm summer months on Mars, then vanish when the temperatures drop. Scientists suspected the streaks were cut by flowing water, but previously had been unable to make the measurements.

Mars Reconnaissance Orbiter makes its measurements during the hottest part of the Martian day, so scientists believed any traces of water, or fingerprints from hydrated minerals, would have evaporated.

Also, the chemical-sensing instrument on the orbiting spacecraft cannot home in on details as small as the narrow streaks, which typically are less than 16 feet wide. But Ojha and colleagues created a computer program that could scrutinizeindividual pixels. That data was then correlated with high-resolution images of the streaks. Scientists concentrated on the widest streaks and came up with a 100 percent match between their locations and detections of hydrated salts.