The National Air and Space Museum in Washington，DC has thousands of objects on display，including the 1903 Wright Flyer，Charles Lindbergh's Spirit of St．Louis，the Apollo 11 Command Module Columbia，and a lunar rock you can touch．In addition to our exhibition galleries，you may want to visit the Albert Einstein Planetarium，Lockheed Martin IMAX Theater，and the Public Observatory on the east end．There are many things to do at the Museum in DC．We offer daily tours and educational activities for both children and adults．We also have scheduled lectures and events throughout the year．

Hours & Admission：Open every day except December 25．Admission is free．

    Regular hours：10：00 am to 5：30 pm

    Extended Hours：10：00 am to 7：30 pm

    December 26-30，2016

    March 30-April 20，2017

    Fridays and Saturdays，April 24-May 16，2017

    May 17-September 7，2017

    VISITING TIPS：

    Limit the Number of Bags：All visitors are screened through metal detectors upon entry．The fewer items you bring inside the Museum，the faster your entry．Before you visit，please review the list of prohibited items，which include pocket knives and tripods（三脚架）．Visitors carrying prohibited items will not be allowed inside the museum，so please leave them at home or in your car．

    No food and Drink：Only bottled water is permitted in the Museum．You may only consume food and other drinks in the Food Court，not in the Museum．Groups who bring food are encouraged to picnic on the National Mall．

Please Take Photos：You are welcome to take photos for personal use．However，tripods and monopods（单脚架） are not permitted without approval．

    First Aid：The Museum has a First Aid office and a nurse on duty．Please contact the nearest security officer or the Welcome Center for assistance．

    Visit the Welcome Center：At our Welcome Center in the South Lobby，staff and volunteers can answer any questions you have during your visit．

    Phone：202-633-2214

    E-mail：NASM-VisitorServices@si．edu

    One of the most important things in the world is friendship. In order to have friends, you have to be a friend. But how can you be a good friend at school?

    Listen — Listen when they are talking. Don't say anything unless they ask you a question. Sometimes it's not necessary for you to have anything to say; they just need someone to talk to about their feelings.

    Help them — If your friend is ever in need of something, be there to help them. You should try to put them first, but make sure you don't do everything they want you to do. Try to take an extra (额外的) pencil or pen with you to classes in case (以防) they forget one. Have a little extra money in your pocket in case they forget something they need.

    Be there for them — Try to make something for your friend to help make them feel better in hard times. Making cards and encouraging them are among the nicest things you can do for a friend. Marilyn Monroe, a famous U.S. actor, once said, “I often make mistakes. Sometimes I am out of control. But if you can't stay with me at my worst, you are sure not to deserve (值得) to be with me at my best.” Always remember this! If you don't want to stay with your friends when they're in hard times, then you don't deserve to be with them when they're having a good time!

    ______ — Try to make plans with your friends. Go shopping, go for ice cream, have a party, go to a movie and so on. Take time to know each other even better by doing something you both enjoy. By planning things together, you both can have a good time. And you'll remember these things when you're all old!

    I am astonished at the way God knows when to send a special gift of encouragement at just the right time! It might be in a dream, a lost letter, a memory, or something found that we'd forgotten about.

    My grandmother was from a town in Michigan. And summer after summer I enjoyed staying with my grandparents as a young child. I was from the city and loved the small town where they lived. People knew everyone, their children, their pets, their ancestors.

    Grandma was always using her hands for something exciting …She would make sandwiches and we'd have tea parties, plant flowers and carefully tend them. She loved knitting sweaters as well as making beautiful quilts　for her grandchildren. I remember the small thimble ( 顶 针 ) she would place on her finger while doing her needlework.

    A few years ago, when Grandma left this earth for her new residence in Heaven, I bid farewell to my loving grandmother. How quickly our lives can change! We had just had tea together a couple of months earlier, on her 91st birthday. I missed her very much, but I noticed it mostly on my birthdays, because there was no card from Grandma. She'd never forgotten my birthday!

    On one particular birthday when I was feeling a little low, something happened and made me feel as if she was sharing that special day with me. I was arranging some colorful pillows that she had made, and suddenly I felt something inside one pillow; it was small and hard. I moved the object to a seam (缝) that I carefully opened, and, to my delight, out came a tiny silver thimble!

    How happy I was to find something that had been a part of her! Not realizing k had fallen off her finger, I pictured her sewing h into that little pillow that I just happened to fluff (抖松), to place on my bedspread (床罩) that day. I carefully laid the thimble alongside the others Id collected over the years. What a precious memory of a very special lady who, somehow, I knew, was laughing in delight at sewing her thimble into my pillow. I heated the kettle and made some tea, using my best china, as Grandma always did, and then enjoyed my tea and Grandma's thimble. What a wonderful birthday that was!

    Summer Activities

    Students should read the list with their parents/careers, and select two activities they would like to do. Forms will be available in school and online for them to indicate their choices and return to school. Before choices are finalised, parents/careers will be asked to sign to confirm their child's choices.

    While faking and fierce looks are among animals great defenses, many species know that everyone runs from a big stink (臭气) too.

    Vulture (秃鸳)

    Vultures, are street sweepers that feast on the rotting flesh of dead animals, which benefits us by ridding our highways and landscapes of animal bodies and the bacteria they might carry. When vultures feel threatened they vomit, and the smell of vomited-on dead bodies puts of most predators. Throwing up allows the vulture to fly away more quickly-and the vomit can hurt the aggressor's eyes and face.

    Opossum (负鼠)

    In some ways opossums have it easy. In order to become "dead", they don't have to fax anyone a death certificate. They just lie there with their tongues hanging out with the smell of dead flesh, sometimes for hours, effectively convincing potential predators they can find a much fresher meal elsewhere. Even if they keep getting attacked, they won't move any more than a human statue until the threat has passed.

    Hoatzin (磨雉)

    Hold your nose and meet the hoatzin, a bird of distinctions, not the least of which is that it smells like fresh cow shit. The animal mostly eats leaves and it's the only bird known to digest by fermentation, like a cow. This process is what causes its smell and has earned it the nickname the "stink bird

    Millipedes (千足虫)

    Millipedes are tricky. For starters they look wormy. Their name is deceptive, too: Their legs number about 750. Their major defense is to curl up into a ball. They, though, also release a harm eyes, and leave a horrible smell on their attackers.

    Sea Hare (海兔)

    The graceful sea hare is plain in taste in the first place, so it's not the most popular dish in the seafood chain. Nonetheless this type of sea creature has a pretty creative smell-related defense that is almost the opposite of its smelly companions on this list. The sea hare gives out a slimy, purple ink, the substance which makes food less palatable to predators.

    Researchers using lobsters (2-f) as model predators found that the sea blocks the lobsters receptive mechanism. In other words, the sea hare gives its attacker the equivalent of a stuffy nose so they don't know how appealing it is.

    Reuel Tolkien (1892－1973), the British linguist, writer. He created a fantasy novel "The Lord of the Rings" the well­known trilogy (三部曲).

    Tolkien was born in Bloemfontein, South Africa. When he was 4 years old, his father died and his family moved back to England. Tolkien graduated from Oxford University when he was 23 years old, and participated in the First World War. During the war, Tolkien suffered from "trench fever" and stayed in the hospital until the end of World War Ⅰ. It was the days in the hospital that he began his writing career first.

    After the war, Tolkien became a linguist. He was an editor of the "New English Dictionary" of 1918－1920. However, he was more researching into Anglo­Saxon language which makes his extensive contacts in Britain and the Nordic spread all over the folklore and mythology.

    In 1937, Tolkien completed his first work "The Hobbit". Although this was a fairy tale, it was also suitable for adults to read. Because of good sales, the publisher Allen & Unwin convinced Tolkien to write its sequel. This encouraged Tolkien to complete his most famous works the epic (史诗) trilogy "The Lord of the Rings". The works of writing went on for almost a year with the support from his good friend Lewis.

    At the beginning "The Lord of the Rings" was similar works for children, but after that writing style quickly became serious and dark. "The Lord of the Rings" was one of the most popular literary works in the 20th century in terms of sales and readers' evaluation. Tolkien's influence is important, for the success of "The Lord of the Rings" makes the fantasy novels of this literature genre (体裁) develop rapidly.