Article: Surgeons in Spain have successfully carried out the world's first organ transplant using new stem cell technology. Some people are calling it the greatest medical breakthrough so far this century. But what are stem cells? As we know, most cells in our bodies are designed to serve specific purposes - for example, a liver cell develops to work in the liver and cannot become a heart cell. But stem cells are different. They are very young, and in the laboratory scientists can grow them into different types of cell. Claudia Castillo needed a new windpipe after getting a serious disease. Scientists from the University of Bristol in the UK took a donor windpipe, or trachea, from someone who had recently died. They used strong chemicals to remove the donor's cells, leaving a tissue scaffold . This was refilled with cells from Ms Castillo's windpipe, and stem cells from her bone. After four days the cells had grown sufficiently for the windpipe to be transplanted into Ms Castillo. Currently, transplant patients have to take drugs for the rest of their lives to prevent their bodies rejecting the new organs. These drugs can have bad side-effects, and do not always prevent rejection. But by using Ms Castillo's own cells, doctors were able to trick her body into thinking the new windpipe was her own organ. Five months on, Claudia Castillo is in perfect health. This ground-breaking procedure could be used in other transplant operations in the future. Scientists also believe stem cells might be used to treat Parkinson's disease, Alzheimer's disease, heart disease, stroke, arthritis, diabetes, burns and so on. However, stem cell research is extremely controversial. The most effective stem cells do not come from adults but from embryos created in laboratories and which are just a few days old. Many people have religious or ethical objections to growing embryos, even if they can be used to cure diseases. Question: Which word can best describe the scientists' attitude towards the stem cell technology? Yes or no, is the answer "confident"?
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Article: Imagine having an idea, drawing it on paper, bringing it to a store and seeing it turned into a physical object.This is now possible with the help of 3D printers.Such machines were once used just by universities and big companies.But now, stores with 3D printing services are appearing around the United States. Bryan Jaycox and his wife opened The Build Shop LLC in Los Angeles two years ago.The store is filled with tools like a laser cutter, an industrial sewing machine and 3D printers.Bryan Jaycox requires $ 15 an hour to print an object.He also charges a fee depending on the size of the object and up to $ 50 an hour for design and labor services. The Jaycoxs also offer 3D printing classes for anyone who is interested.One of the students in a recent class was Ki Chong Tran.He plans to open a 3D printing business in Cambodia."The demand has been amazing.It's been much more than I would have imagined," said Ki Chong Tran. "I think 3D printing is going to be huge. It's going to make a huge impact on society as a whole," he added. Mr Jaycox predicts that within five years, 3D printing technology could become more consumer friendly. But Ki Chong Tran says even current technology can make a difference in a developing country like Cambodia."With 3D printing you can give them tools, and you put it in their hands so they are responsible more for their own development. They learn skills beyond just learning English and becoming a tour guide or something like that or working at a bank.You can actually create things that give value to the world," said Ki Chong Tran. He says it's not just Cambodia but anywhere where there is a 3D printer, it can turn a good idea into reality. Question: How will 3D printing technology benefit developing countries according to the text? Yes or no, is the answer "It offers them a new way of development."?
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Q: Article: For many parents, raising a teenager is like fighting a long war, but years go by without any clear winner. Like a border conflict between neighboring countries, the parent-teen war is about boundaries: Where is the line between what I control and what you do? Both sides want peace, but neither feels it has any power to stop the conflict. In part,this is because neither is willing to admit any responsibility for starting it. From the parents' point of view, the only cause of their fight is their adolescents' complete unreasonableness. And of course, t _ Both feel trapped. In this article, I'll describe three no-win situations that commonly arise between teens and parents and then suggest some ways out of the trap. The first no-win situation is quarrel on unimportant things. Examples include the color of the teen's hair, the cleanness of the bedroom, the preferred style of clothing, the child's failure to eat a good breakfast before school, or his tendency to sleep until noon on the weekends. Second, blaming. The goal of a blaming battle is to make the other admit that his bad attitude is the reason why everything goes wrong. Third, needing to be right. It doesn't matter what the topic is--politics, the laws of physics, or the proper way to break an egg--the point of these arguments is to prove that you are right and the other person is wrong,for both wish to be considered an authority--someone who actually knows something--and therefore to command respect. Unfortunately, as long as parents and teens continue to assume that they know more than the other, they'll continue to fight these battles forever and never make any real progress. Question: Parents and teens want to be right because they want to _ . Yes or no, is the answer "gain respect from the other"?
A: No

*Question*
Article: Good news for middle and high school students. When it comes to sleeping a little longer, physicians are on your side. On Monday, the American Academy Pediatrics announced its recommendation that middle and high schools start at 8:30 a.m.or later. "Doing so will match school schedules to the biological sleep patterns of adolescents," the AAP writes in a press release regarding its new policy statement called "School Start Times for Adolescents" . "Chronic sleep loss in adolescents is one of the most common public health issues in the U.S.today," according to Judith Owens, director of Sleep Medicine at Children's National Health System. "The research is clear that adolescents who get enough sleep have a reduced risk of being overweight or suffering depression, are less likely to be involved in automobile accidents, and have better grades, higher standardized test scores and an overall better quality of life," Owens said in the press release. "Studies have shown that delaying early school start times is one key factor that can help adolescents get the sleep they need to grow and learn." Even before the AAP's announcement, school districts across the country have been rethinking start times. Earlier this year The New York Times wrote about Dos Santos, a student at Rock Bridge High School. When Dos Santos learned that school officials were considering starting school 30 minutes earlier than the existing time, she became worried.The student gathered others to her cause. In the end, school officials decided against the earlier start time. One of the organizations that Dos Santos reached out to for help was Start School Later, a nonprofit organization that focuses on getting public schools to set "healthy school hours." "It's going to take collective action, perhaps on a national scale, to get many districts to take on this issue," Terra Ziporyn Snider, PhD, director and co-founder of Start School Later, told Yahoo Health. "The science is clear, the will to change isn't," she explained. "The reason for that is... Question: What can be learned about Start School Later? Yes or no, is the answer "Dr.Snider is director of this nonprofit organization."?
**Answer**
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