The hole in the Earth's ozone layer has until now protected Antarctica from the worst effects of global warming. But scientists have warned that as the hole closes up in the next few decades, temperatures on the continent could rise by around 3oC on average, with melting ice contributing to a global sea level increase of up to 1.4 metres. In the past decades the western Antarctic has seen rapid ice loss as the world has warmed, but the other parts of the continent have, _ , been cooling, resulting in a 10% increase in ice in the seas around the region. This is because the hole in the ozone layer has increased cold winds in Antarctica, making much of the continent surface colder than usual. But now that the gasses that cause the ozone hole have been banned, scientists expect the hole to repair itself within the next 50 to 60 years. By then the cooling effect will have faded out and the Antarctic will face the full impact of global warming. This means an increase in average air temperatures of around 3OC and a reduction in sea ice by around a third. The biggest threat to the continent comes from warming seas. Robert Johnson, a scientist who monitors Antarctica ice sheets, said, "The ice sheets in Antarctica are hundreds of metres thick. But once warm ocean waters start flowing underneath, the ice will begin thinning and could break up very quickly. "Thinning ice sheets cause ice to break away from the continent and to melt even faster. Escaping ice from western Antarctica has already resulted in a 10% rise in global sea level in recent decades. Johnson believes that international action to reduce global warming is required immediately or it may be too late. "Everything is connected - Antarctica may be a long way away but it is an important part of the Earth's system," said Johnson. "It contains 90% of the world's ice, 70% of the world's fresh water and that is enough, if it melts completely, to raise sea levels by 63 metres." Even in a worse-case situation scientists don't expect the ice to entirely... Which of the following is true according to the passage? A) Antarctica contains most of the world's fresh water. B) The average temperature has increased by 3 degree centigrade in recent decades. C) Antarctica is currently experiencing the full effects of global warming. D) Ten percent of Antarctica's ice has already been lost.
A
According to some researchers, you should not praise children for everything that they do. It does not help them build self-confidence. Most parents and teachers agree that praise can help increase children's self-confidence --the more, the better. However, according to some researchers, only proper praise is good for children. If adults praise everything children do, it makes children look for praise all the time, not trying to do their best. "Teachers should not say things like 'good job' or 'nice work' whenever a child does anything. They should encourage them to continue to improve," some researchers advise. Another idea is that children with high self-confidence are happier, and do better at school. About this, Marshall Duke, a researcher in children, says, "High self-confidence brought in by too much praise does not make children happier, get more, or become able to do more. Finding a child's advantages and developing them can help build confidence more than too much praise can." Praise also loses its effect if it is given equally to all students. "It's important to tell children the truth about what they've done. Honest feedback is far better than empty praise," Duke adds. "People have got into the habit of not telling children when they're wrong. That makes it hard for them to deal with difficulties when they grow up. That's just how the world is." In order to help children build self-confidence, some researchers advise parents to _ . A) make them live more happily B) let them do more difficult work C) help them do better in school D) encourage them to improve
D
Q: Nola is a 41-year-old northern white rhino that lives at the San Diego Zoo Safari Park in Escondido, California. She is one of only four remaining northern white rhinos in the world, and the only one in the western part of the earth. The other three live in Kenya . Rhinos have lived on earth for more than 40 million years, but they are now at the risk of dying out. Hunters illegally hunt rhinos for their horns , which are used for art, jewelry, and decorations. They sell the horns for thousands of dollars per pound, though it is not allowed by law. Rhino horns are also prized as a key part in traditional medicine, even though scientific tests have proven that the horns cannot cure illnesses. Experts say that every eight hours, one rhino will be hunted. Scientists are trying to find ways to prevent rhinos from dying out. In 1975, the San Diego Zoo Institute for Conservation Research started the Frozen Zoo, a program through which researchers have collected cell samples from more than 8,000 different animal species until now, including the northern white rhino. Scientists hope that by studying the rhino cells, they will gain greater understanding of the species, and will find ways to increase its number. Jeanne Loring works with the Frozen Zoo. Loring's research focuses on pluripotent stem cells, which are cells that can renew and become any cell type. Loring's lab at TSRI is working together with scientist Oliver Ryder of the San Diego Zoo to use pluripotent stem cells to try to increase the number of the northern white rhino. Loring said the goal is to start producing new rhinos through this method over the next couple of years. What was the Frozen Zoo started for? A) Studying the rhino cells. B) Collecting cell samples from plants. C) Preventing rhinos from being hunted. D) Studying animals to help them survive.
A: D
(Question)
Education is not an end, but a means to an end. In other words, we do not educate children only for the purpose of educating them. Our purpose is to fit them for life. In some modern countries it has for some time been fashionable to think that by free education for all -- one can solve all the problems of society and build a perfect nation. But we can already see that free education for all is not enough; we find in such countries a far larger number of people with university degree; they refuse to do what they think "low" work; and, in fact, work with hands is thought to be dirty and shameful in such countries. But we have only to think a moment to understand that the work of a completely uneducated farmer is far more important than that of a professor; we can live without education, but we die if we have no food. If no one cleaned our streets and took the rubbish away from our houses, we should get terrible diseases in our towns... In fact, when we say that all of us must be educated to fit us for life, it means that we must be educated in such a way that, firstly, each of us can do whatever work suited to his brains and ability and, secondly, that we can realize that all jobs are necessary to society, and that is very bad to be ashamed of one's work. Only such a type of education can be considered valuable to society. The writer of the passage thinks that _ . A) education can settle most of the world's problems B) free education for all probably leads to a perfect world C) free education won't help to solve problems D) all the social problems can't be solved by education
(Answer)
D