Australian sleep researchers have developed a set of hi-tech "sunglasses", described as the world's first "time control" glasses, which can imitate sunlight patterns. The team, from Flinders University, in Adelaide, says the glasses send out a soft green glow that helps a traveller adapt to changing sleep patterns and time zones in "small steps". It targets a part of the brain that regulates the human body-clock, by sending signals to the rest of the body that help it slowly realise it is in a different area of the world. It has been suggested the device, called the "Re-Timer", is currently the only wearable body clock adjustment system commercially available. Scientists say the device, officially launched in South Australia, can help ridf the negative effects of long-timel travel and bring new relief to insomnia sufferers, shift workers and even teenagers. "The light from Re-Timer stimulates the part of the brain responsible for regulating the 24-hour body clock," said Prof Leon Lack, its chief inventor. Extensive research has shown that green light is one of the most effective wavelengths for influencing the body clock. The battery-powered device, which retail for PS162 in Britain, then sends signals that cause the production of hormones and daily cycles known as circadian rhythms . Those people who want to sleep peacefully, but wake earlier, should wear it for 50 minutes in the morning for three days. Those who want a lie- in, should wear it for the same time before bed to delay the body clock. The device, which is powered by an inbuilt rechargeable battery, can also be worn as sunglasses during daily tasks such as reading or using a computer. "The glasses have been designed to be user friendly and comfortable to wear so people can go about their normal activities wearing them at work or at home," he said, adding they had been designed based on 25 years of university research. It is estimated that up to 94 per cent of long-time travellers suffer from jet lag because the body becomes confused to... If you wear a "Re-Timer" an hour before bed, you will probably _ . A) wake up earlier than usual B) spend a longer bed time C) sleep less but feel energetic D) have a sleep without dreams
B
(Question)
Throughout history, rainbows have been a source of mystery and legend. Rainbows are also important symbols in a number of cultures around the world. In the Old Testament of the Bible(<<>> ), for example, God shows Noah a rainbow to let him know that the Flood is over and that he will never destroy the earth again with flooding. When it rains, the color1s that make up white light separate because they bend at different angles when they pass through water. The result is some of the color1s can be seen by the human eyes, as well as some that cannot. Everyone knows that we can sometimes see rainbows on a rainy day. However, you actually have a chance of seeing a rainbow anytime there is light behind you and water in the air in front of you. So, if you want to know what it feels like to have the power of God, get a spray , stand with your back to the sun, and create a rainbow! In the seventeenth century, Isaac Newton and Rene Descartes _ . A) they created a new story about rainbows B) learned the ways of the world C) found out how rainbows came about D) analyzed many stories of rainbows
(Answer)
C
Ques: In the summer of 1885, nine-year-old Joseph Meister was very ill. He had been wounded by a sick dog that had rabies , a very dangerous disease. His parents were told that there was probably only one man who could save Joseph's life----Louis Pasteur. When Pasteur was a young boy in France, he spent many hours every day with the chemist who lived in his small town. At that time, the chemist had to make all the medicines himself. Young Louis enjoyed watching the chemist as he worked and helped those people who came to him each day. As a school boy, Pasteur worked slowly and carefully. At first, his teachers thought that young Louis might be a slow learner. Through elementary school, high school, and college, Pasteur worked in the same thoughtful way. Then he became a college professor and a scientist , and he continued to work very carefully. Pasteur was studying about the germs that cause rabies when Joseph Meister became ill.In fact, Pasteur believed he had a medical treatment for rabies, but he had never given it to a person before. At first, Pasteur was afraid to treat Joseph, but the poor child was dying. Pasteur gave Joseph an inoculation every day for ten days. Slowly, the child became better. During his lifetime, Pasteur studied germs and learned how they cause diseases in animals and people. He developed vaccinations that prevent many of these diseases. On September 28,1895, Louis Pasteur passed away, at the age of 72. The work of this great man has been of great help to modern medicine. According to the text, young Louis _ . A) was once badly hurt by a dog B) was very interested in medicine C) made a living by working for a chemist D) had been thought of by his teachers
Ans: B
The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid--we simply weigh too much, and all our mass pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink. However, several types of animals can walk on water. One of the most interesting is the common basilisk. Basilicus, a lizard native to Central and South America. It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we'd need huge feet that we could bring up to our ears in order to create adequate "hitting. " But fortunately there is an alternative: cornflour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a "non-Newtonian" liquid that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles in the water group together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of an adequately thick liquid of cornflour. Fun though all this may sound, it's still rather messy and better read about in theory than carried out in practice, if you must do it, then keep the water wings handy in case you start to sink--and take a shower afterward! What is the function of the cornflour according to the passage? A) To create a thick liquid. B) To turn the water into solid. C) To help the liquid behave normally. D) To enable the water to move rapidly.
A