Perhaps it is hard to imagine that a bad tooth could be deadly. But doctors in the Washington area say a twelveyearold boy died last month of a tooth infection that spread to his brain. They say it might have been prevented if the boy had received the dental care he needed. Experts at the National Institutes of Health say good dental care should start at birth. They say breast milk is the best food for the healthy development of teeth. Breast milk can help slow bacterial growth and acid production in the mouth. When baby's teeth begin to appear,you can clean them with a wet toothbrush. Dentists say it is important to find soft toothbrushes made especially for babies,and use them very gently. The use of fluoride to protect teeth is common in many parts of the world. This natural element is often added to drinking water supplies. The fluoride mixes with enamel ,the hard surface on teeth,to help prevent holes,or cavities from forming. But the American Academy of Pediatric Dentistry points out that young children often swallow toothpaste when they brush their teeth. The group notes that swallowing fluoridated toothpaste can cause problems. So young children should be carefully supervised when they brush their teeth. And only a small amount of fluoridated toothpaste,the size of a green pea,should be used. Parents often wonder what effects sucking a thumb or sucking on a pacifier might have on their baby's teeth. Dental experts generally agree that this is fine early in life. The American Academy of Family Physicians says most kids stop sucking their thumbs by the age of four. If it continues,the group advises parents to talk to their child's dentist or doctor. It could influence the correct development of permanent teeth. All the following statements are good to teeth except that _ . A) children live on breast milk every day B) children begin to brush their teeth when they are old enough C) children use fluoride toothpaste to brush their teeth D) children form the habit of sucking their thumbs
B
Marjorie Gestring Marjorie Gestring was a springboard diver from the United States who won the gold medal in 3-meter springboard diving at the 1936 Summer Olympics in Berlin, Germany at the age of 13 years. With the cancellation of the Olympics in 1940 and 1944 because of World War II, Gestring did not get a chance to defend her title, and her comeback attempt for the 1948 Summer Olympics failed. Bob Mathias 17-year-old American Bob Mathias won the decathlon only four months after taking up the sport. He is the youngest athlete in Olympic history to win a men's track and field event. By the time Mathias retired from decathlon competition in 1952, he had nine victories in nine competitions. He had won two gold medals separately in 1948 and 1952. In 1954 a film about his early life called The Bob Mathias Story was made, in which he and his wife played themselves. Fu Mingxia Fu Mingxia was born on August 16, 1978 in Wuhan, Hubei Province. At an early age, her father taught her to swim at a nearby river. She started exercising gymnastics at age 5, soon turning to diving. Fu Mingxia left home at age 9 to train in Beijing. In the 1992 Summer Olympics held in Barcelona, Fu Mingxia became China's youngest Olympic champion ever when she won the 10-meter platform gold at the age of 13. Ian Thorpe Ian Thorpe was born on 13 October, 1982. He is a former Australian freestyle swimmer. At the age of 14, he became the youngest male ever to represent Australia. Ian Thorpe, 17 years old, won the gold medal in the 400m freestyle by breaking his own world record in Sydney 2000. He has won five Olympic gold medals. What is the passage mainly about ? A) Some young Olympic champions. B) The history of the Olympic Games. C) How to train young Olympic athletes. D) How to prepare for the Olympic Games.
A
Q: Google is testing its newest high-tech device, Google Glass. Most of the technologies for Google Glass are already available on smart phones. Google has taken those same technologies and added them to eyeglass frames . The company describes the glasses as wearable computers that would change the way people view others and the world. "Google Glass is a tiny computer that sits in a lightweight frame, and rests neatly above your eye and it makes exploring and sharing the world around you a lot easier," said Chris Dale, the Senior Manager of Communications for Google Glass. The glasses have a tiny video screen and a camera that connect wirelessly to the Internet through WIFI, a smartphone, or a tablet computer. You can make and receive calls, send and receive texts, take pictures, record video or search the web. You control Google Glass using your voice, and a touchpad on the right arm of the frame. Professor Marcia Dawkins is among a select group of people who have been given a chance to test out Google Glass. "I thought this is something I definitely need for my classroom and hopefully for my personal life too." The Professor's Google Glass looks like a pair bright orange glasses, without the actual glass. But there's a tiny rectangular glass at the top right-hand corner. Through that glass, she has been recording video while biking. She also has been able to talk to her sister in Thailand, and she plans to use the device to teach a public speaking class. But not everyone is excited about Google Glass. Some are concerned about possible risks to privacy. John Simpson is the director of the privacy project at Consumer Watchdog. "It is going to allow people to come in and spy on you and record that, without you knowing what is going on." Filmmaker Chris Barrett showed just how easy it is to record people without them knowing it. His glass captured a man getting arrested after a fight. He shared the video on You Tube. Also some are concerned about the use of facial recognition technology on Google Glass. But Google... Which of the following is not true about Google Glass? A) It's a very small computer. B) It's very light in weight. C) Everyone can buy it now. D) It can be used for teaching by school teachers.
A: C
(Question)
Louis Pasteur, one of the world's great scientists, was born in 1822, and died in 1895.While still a young boy, Louis Pasteur made his decision to become a scientist. He spent much of his life time studying the diseases of cattle, chickens and other tame animals. His wife learned to help him with his work. Almost everyone knows that Pasteur is the man responsible for finding a way of preventing milk from spoiling . Not many people know he was the first to imagine and to prove that air we breathe is full of germs . One of his greatest successes was finding a treatment for people and animals to prevent a disease called rabies . Louis Pasteur won many honors and could have got large amount of money. But Pasteur preferred to live simply. The real happiness of this unusual man came from his work. Louis Pasteur did so well in his life that the French government took up his work and created the Institute Pasteur in the year 1888. Why were many honors given to Louis Pasteur? A) Because he was the greatest scientist in the world. B) Because he spent much of his life time studying the diseases of people . C) Because he lived simply. D) Because he was a great success as a scientist.
(Answer)
D