A Healthy Habits Survey shows that only about one third of American seniors have correct habits. Here are some findings and expert advice. 1.How many times did you brush your teeth yesterday? *Finding:A full 33% of seniors brush their teeth only once a day. *Step:Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes, at least twice a day. 2.How many times did you wash your hands or bathe yesterday? *Finding:Seniors, on average, bathe fewer than 3 days a week. And nearly 30%wash their hands only 4 times a day-half of the number doctors recommend. *Step:We touch our faces around 3,000 times a day-often inviting germs to enter our mouth, nose, and eyes.Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds. 3. How often do you think about fighting germs? *Finding:Seniors are not fighting germs as well as they should. *Step:Be aware of germs. Do you know it is not your toilet but your kitchen sponge that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds. What is found out about American seniors? A) Most of then have good habits. B) About one third of them brush their teeth only once a day C) All of then are fighting germs better than expected . D) Nearly 30%of then bathe three days a week .
B
Controlling the Ebola virus outbreak at the source in West Africa is the most effective way to decrease international risk of transmission, according to a research paper. If the epidemic persists and grows, it's likely there will be more cases of the deadly virus exported to other countries, including Canada, via air travel, said Dr. Kamran Khan, a physician and researcher at St. Michael's Hospital. Dr. Khan, who examines global airline travel patterns to predict the spread of diseases, said that every month, three Ebola-infected travellers are likely to leave West Africa, which is experiencing a widespread outbreak of the virus -- and this number would only increase as the epidemic grows. Dr. Khan and his co-authors said it is essential that other countries, their public health agencies and hospitals should be prepared. The risk of international spread would be further _ if this epidemic were to take hold in other countries, especially those with weak public health systems. "The international community must be mindful and be ready to support the early detection and control of cases." Dr. Khan said. Dr. Khan noted that of the almost 500,000 travellers who flew on commercial flights out of Guinea, Liberia or Sierra Leone in 2013, more than half were headed to destinations in five countries: Ghana (17.5 per cent, Senegal (14.4 per cent), the United Kingdom (8.7 per cent, France (7.1 per cent) and Gambia (6.8 per cent). More than 60 per cent of travellers from those countries in 2014 are expected to have final destinations in low- or lower-middle income countries. "Given that these countries have limited medical and public health resources, they may have difficulty quickly identifying and effectively responding to imported Ebola cases", said Dr Khan. How does Dr. Khan predict the spread of diseases? A) By doing experiments B) By examining global airline travel patterns C) By setting up a model D) By collecting the data of the cases
B
Q: The journey two naval officers made some time ago to the very deepest point on the earth makes us realize how much of the world still remains to be explored.The two men went down 7 miles to the bottoms of the Pacific Ocean inside a small steel ball called a "bathyscaphe" to find out if there are any ocean currents or signs of life.Above the ball there was a special tank full of petrol which was slowly emptied into the water to make the bathyscaphe heavy enough to complete its journey. It was necessary to set out early, so that the bathyscaphe would come to the surface in daylight, and so be easily found by the mother ship which would be waiting for it.The divers began preparations at dawn and soon afterwards, when all was ready, the steel ball disappeared under the surface of the water. The divers felt as if they were going down steps as they passed through warm and cold layers of water.In time, the temperature dropped to freezing point and the men shivered inside the ball.They kept in touch with the mother ship by telephone describing how they felt.Then , at a depth of 3,000 feet, the telephone stopped working and they were quite cut off from the outside world.All went well until some four hours later at 30,000 feet, the men were startled by a loud, cracking noise; even the smallest hole in the ball would have meant instant death.Luckily, though, it was only one of the outer windows that badly broken.Soon afterwards, the bathyscaphe touched the soft ocean floor raising a big cloud of "dust" made up of small, dead sea-creatures.Here, powerful lights lit up the dark water and the men were surprised to see fish swimming just above them quite untroubled by the enormous pressure.But they didn't dare to leave the lights on for long, as the heat from the lights made the water boil.Quite unexpectedly, the telephone began working again and the faint but clear voices of the officers were heard on the mother ship 7 miles away.After a stay of thirty minutes the men began their journey up, arriving three hours later,... According to the passage, two naval officers made a journey to the bottoms of the Pacific Ocean _ . A) to experience the journey down into the deep ocean B) to find out if there are any ocean currents or signs of life C) to find out the exact temperature under the sea D) to find out if fish can swim troubled by the enormous water pressure
A: B
(Q).
Started in 1636, Harvard University is the oldest of all the many colleges and universities in the United States. Yale, Princeton, Columbia and Dartmouth were opened soon after Harvard. In the early years, these schools were much alike. Only young men went to college. All the students studied the same subjects, and everyone learned Latin, Greek and Hebrew. Little was known about science then, and one kind of school could teach everything that was known about the world. When the students graduated, most of them became ministers or teachers. In 1782, Harvard started a medical school for young men who wanted to become doctors. Later, lawyers could receive their training in Harvard's law school. In 1825, besides Latin and Greek, Harvard began teaching modern languages, such as French and German. Soon it began teaching American history. As knowledge increased, Harvard and other colleges began to teach many new subjects. Students were allowed to choose the subjects that interested them. Today, there are many different kinds of colleges and universities. Most of them are made up of smaller schools that deal with special fields of learning. There's so much to learn that one kind of school can't offer it all. The oldest university in the US is _ . A) Yale B) Harvard C) Princeton D) Columbia
(A).
B