Article: Scientists have claimed a milestone in the drive for new energy--development of the first practical artificial leaf, an advanced solar cell that imitates the process,called photosynthesis ,that green plants use to make sunlight and water into energy. "A practical artificial leaf has been a dream of scientists for decades,"said Daniel Nocera,who led the research team."We believe we have made it.The artificial leaf shows particular promise as an inexpensive source of electricity for homes of the poor in developing countries. One can imagine villages in India and Africa soon purchasing an affordable basic power system based on this technology." The leaf is like the shape of a poker card but thinner.Placed in water in a bright sunlight,it could produce enough electricity to supply a house in a developing country with electricity for a day by splitting water into hydrogen and oxygen, which are stored in a fuel cell to produce electricity. The"artificial leaf"is not a new concept.The first artificial leaf was developed more than a decade ago by John Ttlrner.However, it was impractical for wider use,as it was composed of rare,expensive metals and was highly unstable with a lifespan of barely one day. Nocera's new leaf overcomes these problems.It is made of inexpensive materials that are widely available,works under simple conditions and is highly stable.Laboratory studies showed that it could operate continuously for at least 45 hours without a drop in activity. The key to this breakthrough is Nocera's recent discovery of several new powerful, inexpensive catalysts,which are able to accelerate the chemical reaction under simple conditions.Right now, Nocera's leaf is about 10 times more efficient at carrying out photosynthesis than a natural leaf.Yet he is optimistic that he can boost the efficiency of the device much higher in the future. Question: Daniel Nocera describes his artificial leaf as promising in _ . Yes or no, is the answer "providing electricity for the poor family at a low cost"?
No

Article: Preparations are underway around the world for Chinese New Year (Feb 19) and celebrations in China will be mirrored across the planet wherever the Chinese Diaspora calls home. Here are some Chinatowns for those outside of China wishing to mark the day. London Although it may not be as large or as long-built as others, having only become a center for the Chinese community during the 1950s, London's Chinatown is a perfectly formed little firework that knows how to see in the year with a bang. Decorated with red lanterns , previous years have seen shows with acrobatics , martial arts , dance and opera nearby. San Francisco San Francisco's Chinatown is perhaps the most famous in the United States. The city was the main entry-point for Chinese who had crossed the Pacific to the USA during the early 19th century. Between the Grant Avenue and the Stockton Street, this historic area is a local treasure, attracting more visitors per year than the Golden Gate Bridge. Bangkok With a more than 100-year-old history, the Thai capital's Chinatown contains complex streets offering all kinds of tasty treats, clothes, toys and antiques. Sunday market days are such a good time to get the full atmosphere of the neighborhood. The area is also known for its gold dealers, whose shops line the road. Mauritius Found in Port Louis, this Mauritian Chinatown shows the island nation's rich multicultural diversity. Established in the early years of the 20th century by settlers from China, its tiny shops and restaurants serve locals and visitors. During the Chinese Spring Festival, the most exciting sight is the Dragon Dances on Rue Royale when Chinese musicians and dancers perform the traditional Lion dances through the streets. Question: What's special about Bangkok's Chinatown? Yes or no, is the answer "It is well-known for its gold business."?
No

Q: Article: To win an Oscar is an achievement at any age. To do so at 22, as Jennifer Lawrence has, is just amazing. Recently, the American star won Best Actress at this year's Academy Awards for her role in the film The Silver Linings Playbook. According to Time magazine's Richard Corliss, Lawrence is that rare young actress who "lends a mature intelligence to any role". Though Lawrence has found great success through her big screen work, Lawrence wasn't sure what she really liked doing before the age of 14. She thought she'd go to college and maybe find a career as a doctor or a travel agent. Lawrence's two brothers were star athletes and one of them was a straight-A student. Unlike them, she suffered through school, never quite finding where she belonged. However, during a trip to New York, Lawrence suddenly realized that she wanted to be an actress. When she was enjoying the beautiful city, a model seeker asked if he could take her picture, and the next day he called her in for an audition . "I read the script and it was the first time I had that feeling like I understand this," Lawrence said. "Within 20 minutes, in the cab ride from the hotel room, I decided I didn't want to be a model. In fact, I wanted to be an actress." Having appreciated this young lady's performance, the agency was so impressed with her reading that they signed her on the spot. But she insisted on finishing high school so she could give her full attention to her acting career. Lawrence burst onto the Hollywood scene last year with The Hunger Games, which established her as the highest-grossing female action hero of all time. Rolling Stone called her"the most talented young actress in America". Question: Lawrence made up her mind to be an actress because of _ . Yes or no, is the answer "a model interview"?
A: Yes

(Q).
Article: If you ask most Americans, they would say their favorite season of the year is summer. The weather is warm. They do not have to wear heavy clothes to keep warm. Young people do not have to go to school. They can do many activities outside, like playing sports and swimming at the beach or the pool. They like the sunshine during the day and the warm summer nights. People have written and recorded hundreds of songs about summer. These are some of our favorites. One of the most famous songs about summer is from George Gershwin's opera "Porgy and Bess". He wrote the music in nineteen thirty-five. The opera takes place in the southern United States. It opens with these words: "Summertime and the living' is easy. Fish are jumping' and the cotton is high." Leontyne Price sings the song. The nineteen fifties and sixties produced many songs about teenagers enjoying their summer vacation from school. The songs are about having fun, swimming in the ocean, driving in cars. However, for some teenagers, summer vacation was not all fun and games. Some of them had to work to earn money. Question: Why did people write and record so many songs about summer? Yes or no, is the answer "They like summer."?
(A).
No