Nowadays more and more people are talking about geneticallymodified foods ( GM foods). GM foods develop from genetically modifiedorganisms (有机体), which havehad specific changes introduced into their DNA by genetic engineeringtechniques. These techniques are much more precise where an organism is exposedto chemicals to create a non­specific but stable change. For many people, thehigh­tech production raises all kinds of environmental, ethical, health andsafety problems. Particularly in countries with long farming traditions, theidea seems against nature.

In fact, GM foods are already very much a part of our lives.They were first put on the market in 1996. A third of the corn and more thanhalf the cotton grown in the U. S. last year was the product of biotechnology,according to the Department of Agriculture. More than 65 million acres ofgenetically modified crops will be planted in the US this year. The geneticgenie is out of the bottle.

However, like any new product entering the food chain, GM foodsmust be subjected to careful testing. In wealthy countries, the debate aboutbiotech is not so fierce by the fact that they have a large number of foods tochoose from, and a supply that goes beyond the needs. In developing countriesdesperate to feed fast­growing and underfed populations, the matter is simplerand much more urgent: do the benefits of biotech outweigh the risks?

The statistics on population growth and hunger are disturbing.Last year the world's population reached 6 billion. The UN states that nearly800 million people around the world are unhealthy. About 400 million women ofchildbearing age don' t have enough iron, which means their babies are exposedto various birth defeats.As many as 100 million children suffer from vitamin Adeficiency, a leading cause of blindness.

How can biotech help? Genetic engineering is widely used toproduce plants and animals with better nutritional values. Biotechnologistshave developed genetically modified rice and they are working on other kinds ofnutritionally improved crops. Biotech can also improve farming productivity inplaces where food shortages are caused by crop damage attributable to drought,poor soil and crop viruses.

    Each passenger needs a farecard to enter and go out .Up to two children under age five may travel free with a paying customer .

    Farecard machines are in every station .Bring small bills because there are no change machines in the stations and farecard machines only provide up to $5 in change.

    Get one ticket of unlimited Metrorall rides with a One Day Pass .Buy it from a farecard machine in Metro stations .Use it after 9:30 a,m. until closing on weekdays , and all day on weekends and holidays .

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    Oliver and the Seawigs by Philip Reeve

    Published by OUP Press

    ISBN: 978-0-192-73455-6

    Oliver grew up in a family of explorers—but his biggest adventure is about to begin! Along with his new friends, Oliver goes off to look for his missing parents.

    I really like this book because it's not one of those short stories that are over too quickly, but a longish book that takes time to read. I recommend this book and give it 5 stars.

    Ginny, age 8

    Lady Lydia: Read Me a Story by Anne Lavis

    Published by A H Stockwell

    ISBN: 978-0-722-34327-2

    Lady Lydia is old and eccentric (古怪的), but she is never lonely. She shares her home with bats and mice and spiders, and all the animals round about are her friends too.

    My lovely daughter Alice likes all the pictures of the animals in this book, but she doesn't like it when the pages have lots of writing on with no pictures. Alice rates this book 2 out of 5.

    Alice, age 4

    I Am a Woolly Hat (EARLY READER) by Salma Koraytem

    Published by Orion Books

    ISBN: 978-1-444-00844-9

    Early Readers are stepping stones from picture books to reading books. A blue Early Reader is perfect for sharing and reading together.

This book makes my sweetheart Lucie feel lovely inside and the drawing are not as good because the colors are not bright like other books. Lucie rates this book 3 out of 5.

    Lucie, age 4

   A Royal Fairytale by Ink Robin

    Published by Egmont

    ISBN: 978-1-405-26843-1

    See Kate and Will's romance develop from their studying days at Edinburgh through to their happy wedding at Buckingham Palace with the royal family, even the queen, in tow.

    My little angel Amy likes the book. The best parts are the wedding and fireworks as she likes fireworks and the colors on the page are really bright. Amy rates it 4 out of 5.

    Amy, age 4

    Strongest Female Literary Characters of All Time

    There are some of history's most inspiring and great females who can be found on the pages of these novels.

    Elizabeth Bennet

    Called "Lizzie" or "Eliza" by her family and friends, Elizabeth Bennet is the stubborn and clever heroine from the 1813 Jane Austen novel Pride and Prejudice. She's the second eldest of five daughters in the Bennet family and, like the rest of her sisters, she is expected to marry for status and money, not for love. To remain true to herself, she would rather remain single, a concept that was unheard at the time.

    Nancy Drew

    She first appeared in the 1930s but remains one of the most iconic female characters in all of literature. Created by Edward Stratemeyer, Nancy Drew wasn't simply a pretty girl. Instead, the brave, physically strong, and fiercely intelligent Nancy used her superior intelligence—not her looks—to solve a series of mysteries.

    Josephine March

    Jo March is the second eldest daughter in the March family and is a central focus in the novel Little Women, published by Louisa May Alcott in 1868. At 15, she is strong-willed, confident, and literary and unlike her sisters, she is outspoken and uninterested in marriage. Jo both struggles with and challenges society's expectations of how women in the 19th century should carry themselves, making her one of literature's most daring female characters.

    Hester Prynne

    Recognized by some critics as one of the most important characters in female literature, Hester Prynne is the leading character in Nathaniel Hawthorne's 1850 novel, The Scarlet Letter. Married but separated by distance from her husband, Hester has an affair with a minister and becomes pregnant.

    When he was young, Louis Armstrong was taking what was called “Creole jazz”, which was also called dance music, and combining it with trumpeter (小号手) Buddy Bolden, to create what would eventually become today's jazz.

    Armstrong accomplished that with almost no formal training. He received little training before he was placed in the New Orleans Colored Waif's Home at the age of 12, after a run-in (小争执) with the police. The punishment turned out to be a mixed blessing, for he also had the opportunity to play in a real band.

    While at the Waif's, Armstrong also got the chance to hear some of the city's finest musicians. Cornetist Freddie Keppard performed in a nearby club. So did trumpeter and bandleader, King Joe Oliver, who took the boy under his wing and taught him how to read music and work on his playing technique.

    When Oliver left for Chicago, Armstrong chose to stay in New Orleans and work with some of the other top musicians of the day. In Chicago, King Oliver offered him a place in his band in 1922. It became Armstrong's biggest challenge yet — the band had no parts written for trumpet, so he was forced to listen to King Oliver and improvise (即兴创作).

    Soon, Armstrong's undeniable talent was getting notice. Even classically trained musicians would come to hear the incredible sounds this young man created.

    Lil Hardin, the bands piano player and the future Mrs. Armstrong, explains that Oliver kept Armstrong in the second trumpet-chair so that Oliver would still be “King”. Hardin convinced him to leave the band.

    Armstrong moved to New York City in 1924 to join Fletcher Henderson's band and then flew solo. In 1925, Armstrong put together the Hot Five, expanding his popularity even more. Armstrong recorded his first composition, Cornet Chop Suey, one of the most copied jazz solos of all time. This monumental 1928 recording blends (混合) artistry, endurance and showmanship that has rarely, if ever, been matched in Jazz.

"Given that signs of Alzheimer's disease (老年痴呆症) start to accumulate in the brain several decades before the disease begins, understanding the connection between sleep and cognition (认知) earlier in life is critical for understanding the role of sleep problems as a risk factor for the disease," said study author Yue Leng, PhD, of the University of California, San Francisco.

The study involved 526 people with an average age of 40. They were followed for 11 years. Researchers looked at participants' sleep duration and quality. Participants wore a wrist activity monitor for three continuous days on two occasions approximately one year apart to calculate their averages. Participants slept for an average of six hours. Participants also reported bedtime and wake-up time in a sleep diary and completed a sleep quality survey with scores ranging from 0 to 21. A total of 239 people reported poor sleep with a score greater than five.

Researchers also looked at sleep fragmentation (碎片化), a measure of restlessness during the sleep period expressed as a percentage. The higher the value, the more sleep is interrupted. Participants were divided into three groups based on their sleep fragmentation score. Of the 175 people with the most interrupted sleep, 44 had poor cognitive performance 10 years later, compared to 10 of the 176 people with the least interrupted sleep.

After adjusting for age, sex, race, and education, people who had the most interrupted sleep had more than twice the possibility of having poor cognitive performance when compared to those with the least interrupted sleep. There was no difference in cognitive performance at midlife for those in the middle group compared to the group with the least interrupted sleep.

However, due to the small sample size, the researchers were unable to fully investigate potential race or sex differences. "More research is needed to assess the link between sleep disturbances and cognition at different life stages and to identify if critical life periods exist when sleep is more strongly associated with cognition," Leng said.