A recent study led by researchers from the National University of Singapore (NUS) has found a clear link between the color of a taxi and its accident rate. An analysis of 36 months of detailed taxi, driver and accident data from two fleets of yellow and blue taxis in Singapore suggested that yellow taxis have fewer accidents than blue taxis. The higher visibility (能见度） of yellow makes it less difficult for drivers to avoid getting into accidents with yellow taxis, leading to a lower accident rate.

    The study was led by Prof Ho. To test whether there was a relationship between the color of a taxi and the number of accidents the taxi had, the research team analysed data collected by the largest taxi company in Singapore. The researchers found that yellow taxis have about 6. 1 fewer accidents per 1,000 taxis per month.

    They also studied the economic effect of changing the color of the entire fleet of taxis to yellow. The Singapore taxi company involved in the study owns about 16,700 taxis in a ratio (比例) of one yellow to three blue taxis. If a commercial decision is made to switch from blue to yellow taxis, 76. 6 fewer accidents will occur per month or 917 fewer accidents per year.

    Assuming an average repair cost of $1,000 per car and a downtime of six days, the color of all taxis to yellow could produce an annual saving of $2 million.

    “We are eager to continue to validate (证实) the findings of our study by looking at the use of yellow in other types of public transport, such as school buses. For example, we hope to compare the accident rates of yellow school buses against those of other colors to find out if yellow is indeed a safer color for school buses. Besides, we' re also interested to look at private-hire vehicles and do a comparison of the accident rates of vehicles that are of different colors explained Prof Ho.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    Hello and welcome.My name is Shelley Ann Vernon and I am glad that you want to find out more about teaching English through games.Right here you will find ways to get great results in the classroom for children aged 4 to 12;ways that from my experience will bring more success and joy into the lives of the children you teach.

    You'll learn how to make your serious classes fun,how to ensure everyone gets better grades,how to help inspire the brighter kids while taking care of the slower ones,and how to associate fun with learning by teaching vocabulary and grammar through language games.Earn even more appreciation,love and respect from your students and their parents for your teaching.

    The games presented here work for ESL (English as a Second Language) pupils aged 4 to 12.These games are most suitable for beginners to general level students.

    Achieve results 2×as fast.

    Don't take my word for it;read evidence from teachers and parents:

    Click here to order now with our secure server.Remember,if you are not satisfied,just let us know and we will refund you in full.You still get to keep the essential bonus material,with a value of 25 dollars for FREE,and that's a rare time-saving gain.

    Dodder is an unusual and unwanted plant that attacks other plants. Except for its flowers, the plant looks like spaghetti, a kind of noodles in the shape of long thin pieces that look like string when they are cooked. It's almost leafless, thread-like stems (茎) hang down on top of other plants that dodder needs to stay alive. Dodder does not produce its own food. Instead, it steals food from other plants. It feeds by sucking juices from the plant which is wrapped around, often making its host very weak or even killing it.

    Dodder can find other plants by their smell. When a young dodder plant starts growing, it follows the smell of plants it prefers, like tomato plants, potato plants, or other farm crops. Unlike most plants that usually grow in the direction of light or warmth, a dodder plant will grow in the direction of, for example, tomato smell—if a tomato happens to be growing nearby.

    However, a young dodder plant must find a host plant quickly. It no longer needs its root once it is attached to the host and wrapped around it. If it cannot catch a smell of a potential host within a few days, it will dry up and disappear—even if there is plenty of water around. Once it finds a host, the young dodder plant will attach itself to it and start growing faster. At that point the dodder plant will drop its root.

    Dodder is thus a difficult weed to manage and a real headache for farmers. When it does get out of hand, dodder can greatly reduce a farmer's harvest or even destroy crops completely. Before sowing their produce, especially farmers in warm parts of the world often check to make sure no unwanted dodder seeds have mixed with their crop seeds. This is a good way to stop dodder plants from making their way to a crop field secretly.

    Four teenage girls from Minnesota, US. 120 hours of non-stop togetherness. No cellphones. This is not a reality show, but an adventure journey.

    "It was really perfect," said Julia Ruelle of her recent adventure to the Boundary Waters Canoe Area Wilderness with three of her childhood friends. "By unplugging, we had an amazing time."

    Last year, the 16-year-old took part in an essay contest and carried off a prize. The award was a 5-day canoe and camping adventure with up to three friends. No parents or guides would be there. So Julia invited her friends Anna Wander, Madeline Wilson and Julianna Torelli.

    The four Minnetonka High School juniors arrived in Ely for training the day before they began the journey. They set out the next day at 7 a.m., quickly developing a routine.

    "We were done paddling by noon," Julia said. "We ate lunch at the campsites and then it was time for hammocks (吊床), reading, making friendship bracelets (手镯) and talking."

    The girls had all had experience in the outdoors before.

    Anna had been to the Boundary Waters with her family. "I love how you are separated from everything in your life, especially technology," Anna said. Without her phone, she said, "I'm less worried about things." Madeline, too, had been to the Boundary Waters a few years back. "But this time, I had to paddle right and set up camp," she said. The girls made fire and cooked meal together. No one was ever hungry or homesick, but they were nervous the final night as they waited out a thunderstorm. They left wet sleeping bags in one tent, and squeezed into another for the night. "Every thunderstorm in the Boundary Waters feels huge," Julia said.

    On the car ride home, they were all on their phones catching up with friends. "It was a little at a loss turning my phone on," said Anna. "Mental health can be improved so much in the Boundary Waters. It really helps to get away and reconnect with yourself."

    Welcome to iusEnglish, a wonderful online school that specializes in teaching English to school, aged Chinese children from seven to fifteen. We offer lessons focusing on English reading and writing. Because of the rapid growth of our school, we are now looking for more qualified（合格的）teachers to join us to teach 3rd & 4th grade.

    Online Teachers for 3rd & 4th Grade Reading and Writing Classes

    •Teach 3rd & 4th grade reading classes in an online environment ;

    •The students are Chinese children who are able to communicate in English ;

    •Class schedule will be set up according to teachers' time frame ;

    •Teachers are expected to create lessons and grade students' homework ;

    •40 minutes for a class and one class meeting once a week.

    Desired Skills & Experience

    •A recognized degree and a teaching qualification at the graduate level ;

    •Those with the teaching background in elementary school are highly preferred ;

    •Ability to plan, deliver and motivate students to learn;

    •Strong communication skills to work with cooperation ;

    •Native American English speakers ;

    •Be able to create lessons and prepare lesson plans ;

    •Love teaching! Patience, self­management, positive attitude, and most of all, be devoted ;

    • Two ­year experience in teaching online or in classroom circumstances for programming teachers.

    Teachers are able to work from the comfort of their own homes in the hours and days of their choosing. The benefits of joining iusEnglish are great. Besides earning extra income, teachers are rewarded by watching the continual progress of their students week by week. It' s a win­win situation, and we hope you will consider joining our team.

    Don't hesitate. Please contact us: ius@iusEnglish.com.

    When Kim Chil-doo was young, he says, he wanted to be a model. But he gave up that idea to make money. Now, at age 65, he appears in television advertisements and fashion magazines. With his gray beard and long hair, he is South Korea's first senior model.

    Kim is one of many older people in South Korea the country has the world's fastest growing ageing population. Almost half of the country's older people live in poverty. Some take low-paying jobs to support themselves after retiring. But Kim and some other seniors have shown how older South Koreans can find unusual job opportunities later in life.

    You Sung-lae is 59. When she was a child, she wanted to be an actress. But instead, she says, she got married and had children. Now she is training to appear on a catwalk to show clothes. She was wearing a bright blue jacket, orange high heeled shoes and designer sunglasses.

    You is also helping the fashion business by attracting older buyers. Older buyers have become big players. While many older people do not have much money, others have bought their homes and built savings. Now, those seniors are ready to spend some of their money on themselves.

    Some businesses are also trying to use older people's skills and experiences. For example, Cho Young-min started a company using Skype to connect older instructors in Korea with students around the world. The students are interested in learning Korean, and the instructors are interested in sharing their knowledge.

    Another man, Ji Byung-soo found success by performing a dance song on a televised singing contest. He is 77. Now he earns enough money to donate to a local support center. Last month, he danced nonstop at a youth festival in Seoul while young people called his name. "Life begins in your 70s," Ji said. "Let's be happy and have fun."