Everyone has done experiments in high school laboratories, but have you ever thought about designing a satellite to explore space? On Nov. 19, a team of students from Thomas Jefferson High School for Science and Technology in the US _ peers and even scientists by successfully launching a satellite. The first satellite designed and built by high school students was sent up into space along with a record-setting. 28 other small ones on a rocket were sent from a NASA center in Virginia, CNN reported. It took the students seven years to build. The students call their tiny satellite TJ3Sat, which is named after their school. It is just 10x10x12 centimeters and weighs only 0.89 kilograms, according to Orbital Sciences, a company which developed the rocket and supported the students' project. It can be controlled with a smartphone. Like most satellites, TJ3Sat can send and receive data. The small spacecraft is equipped with a voice synthesizer , which can switch text to voice and transmit those sounds back to Earth over radio waves, said Orbital officials. In this case, anyone can give it a try via the project's website (school website) by submitting a text. The texts that get approved will be sent to the satellite, changed to voice and then broadcast back to Earth via radio waves. "I can say 'Go Colonials' on our ground station and when it is on the other side of the world, in India, someone can hear 'Go Colonials'over the radio," the team explains on the website. The satellite will stay in space for at least three months. School principal Evan Glazer told The Washington Post that the project started in 2006 as an activity in the spare time. Later it became a research project for a select group of seniors. At a time when American students are busy with SATs, the launch of the satellite shows what diligent teenagers can achieve when allowed to pursue their own curiosities, Glazer said. "It used to be that kids growing up wanted to be an astronaut," Andrew Petro, program executive for small spacecraft technology... According to the article, the launch of the satellite _ . A) is evidence of the advance of spacecraft technology B) proves that hard-working teenagers can achieve a lot C) shows the importance of extracurricular activities at school D) has inspired many people to take an interest in space travel
B
In cities with rent control, the city government sets the maximum rent that a landlord can charge for an apartment. Supporters of rent control argue that it protects people who are living in apartment. Their rent cannot increase; therefore, they are not in danger of losing their homes. However, the critics say that after a long time, rent control may have negative effects. Landlords know that they cannot increase their profits. Therefore, they invest in other businesses where they can increase their profits. They do not invest in new buildings which would also be rent-controlled. As a result, new apartments are not built. Many people who need apartments cannot find any. According to the critics, the end result of rent control is a shortage of apartments in the city. Some experts argue that the minimum wage law can cause problems in the same way. The federal government sets the minimum that an employer must pay workers. The minimum helps people who generally look for unskilled, low-paying jobs. However, if the minimum is high, employers may hire fewer workers. They will replace workers with machinery. Therefore, other things being equal, the number of workers that employers want decreases. Thus, critics hold the opinion that an increase in the minimum wage may cause unemployment. Some poor people may find themselves without jobs instead of with jobs at the minimum wage. Supporters of the minimum wage say that it helps people keep their dignity. Because of the law, workers cannot sell their services for less than the minimum. Furthermore, employers cannot force workers to accept jobs at unfair wages. Economic theory predicts the results of economic decision, such as decisions about farm production, rent control, and the minimum wage. The predictions may be corrected only if "other things are equal". Economists do not agree on some of the predictions. They also do not agree on the value of different decisions. Some economists support a particular decision while others criticize it. Economists do agree,... There will be the problem of unemployment if _ . A) the minimum wage is set too high.. B) the minimum wage is set too early. C) the workers are unskilled. D) the maximum wage is set for poor workers.
A
(Question)
Frank was a barber and my grandma Joan was a hairdresser, who moved from London to Rugby and then settled in Cambridge. The worked together in their own shop on Mill Road, and it was above it that my mother and my two older sisters were born. I remember visiting them often at the salon and sitting in the back room eating my lunch, which always seemed to be a boiled egg. I can still recall the burst linoleum ,the almost overpowering smell of hairdresser s chemicals, the barber s shop was at the front and the ladies' salon at the back. They was always barber's banter and customers would try to talk to me, but I mistrusted strangers and was not interested, much to my grandpa's disgust. Frank was a conscientious objector in the second world war and was sent to Bedford prison, Later, he was sent to a prisoner-of-war camp for hard labor, and to guard the prisoners. He made good friends with some of the Italians and after war they visited each other for many years until they all became too old to travel. Grandma was a fantastic cook and picked up a lot of Italian cookery tips on her visits. She could make a delicious meal from basic materials and was a very inventive person, who recycled long before it was fashionable. That generation lived through hard times and two world wars. They were resourceful through necessity, making use and re-using whatever they could. Although my grandfather was a _ man who could be quite difficult sometimes, they were devoted to each other and spent many happy years together. My grandma had a heavy stroke in her 90s and was never the same again, as though part of her brain had been switched off. She tried hard to carry on with her cooking, sewing and knitting etc, but it became too much of a challenge. She died a few years later in 1998, and it broke Frank's heart. Exactly a year later, Frank died, aged 91. The nurse who was with him when he died said his last words were: "I'm coming. Joan." Which of the following is TRUE about Frank? A) He joined the British army in the second world war. B) He refused to serve in the army in the second world war. C) He was sent to the prison to protect the prisoners. D) He fought with some Italians and made friends with them.
(Answer)
B