Read the following article and answer the question. Article: Dr. Jack M. Gwaltney, Jr. a professor at the University Of Virginia School Of Medicine infected six student volunteers with virus, the most common cause of colds. A few days later, when they were coughing and sneezing, he gathered 37 more people and divided them into three groups. Group 1 members spent three days and nights in the same room with one of the infected students, separated by a screen so they couldn't touch one another. Group 2 sat around a table while an infected volunteer talked, coughed and sang to them. Group 3 held hands with an infected student for ten seconds, and then touched their own noses or eyes. Although most scientists at the time, the mid-70s, believed colds were spread by virus-laden droplets spread through the air when infected people coughed or sneezed, Gwaltney suspected physical contact might play an important role. Sure enough, of the 15 people who had touched a student volunteer, 11 became infected--compared with only one of those who had been sitting at the table, and none who had spent three days and nights together. "The best evidence we have is that hand-to-hand contact is the most efficient way of transmitting virus," says Gwaltney. The study was one of a series that helped establish Gwaltney's reputation as a leading authority. Dr. Robert Couch says, "It would not be inappropriate to call him Mr. Common Cold." When Gwaltney is asked how close scientists are to finding a cure, he replies: "If you mean 'get rid of', I don't think we're going to be able to do that with cold viruses any time soon. But if you look in the dictionary, you'll see that 'cure' is explained as a successful treatment. And we're not just getting more effective at treating the symptoms --we're getting at the root cause too. " Question: The result of the experiment shows that _ plays an important role in the infection of colds. Answer:
OPTIONS:
- sneezing at the infected person
- touching the infected person
- sitting together with the infected person
- talking with the infected person
touching the infected person
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Read the following article and answer the question. Article: Large numbers of children in Britain are missing out on the natural world, a study from the RSPB (Royal Society for the Protection of Birds) suggests. The three-year project found that only 21 % of children aged 8 --12 were "connected to nature". Girls were much more likely than boys to be exposed to the great outdoors, while children in Wales had the lowest score across the UK. The RSPB says that a perception among some adults that nature is dangerous or dirty could be holding children back. There has been an increasing amount of research in recent years underlining the lack of contact and experience with nature among modern children. Some have argued that this is having a negative impact on their health, education and behaviour. The RSPB says its new study is the first to quantify the scale of British children's exposure, or lack of it, to the natural world. They came up with a definition of what "connected to nature" actually means and then deve -loped a questionnaire with 16 statements designed to assess the level of connection among children. Some 1, 200 children from across the UK were asked to agree or disagree with these statements. Only 21 % of children in the UK had a level of connection with wildlife and the natural world that the RSPB believes should be realistic and achievable for all youngsters. This "realistic and achievable" value is based on the average scores of children visiting RSPB sites or who are junior members of the organization. One interesting finding was the gender difference. While 27 % of girls were at or above the "realistic and achievable" target, only 16 % of boys were at the same level. "We need to understand these differences," Sue Armstrong Brown, head of conservation at the charity, told BBC New. "Whether boys and girls are scoring differently on different questions, are girls more empathetic to nature than boys for instance? We need to analyze the data to find that out." The report also stressed significant regional differences. Only 13% of children in Wales... Question: How did the RSPB assess the level of nature connection among children? Answer:
OPTIONS:
- By doing an experiment.
- By carrying out a survey.
- By running a test.
- By visiting wildlife.
By carrying out a survey.
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Read the following article and answer the question. Article: Some 30,000 years ago, artists who lived in caves in Europe painted pictures of the animals around them: panthers, hyenas, rhinos, cave lions, mammoths and other creatures which have been extinct for a long time. The paintings were highly realistic. Some even showed movement. The artwork, more than a thousand drawings, is considered the oldest group of human cave drawings which have ever been discovered. They were preserved because the cave was sealed---closed off--for more or less 23,000 years. Fast forward to December 18, 1994, a group of French cave scientists were exploring caves in southern France. Jean Marie Chauvet, who led the group then, describes the process of discovering the cave paintings. "At that time I was in the front, Eliette just walked behind me, Christian behind. Eliette said she saw two marks with red ochre and she said, 'They came here.' And at this very moment everything began. The drawings and everything linked to the parietal art . That is where it is tarted." Cave art expert Jean Clotttes reviewed the paintings. "I was amazed at the number of paintings there were and paintings of their quality and particularly in front of the panel of the horses." Scientific analysis confirmed the prehistoric date of the artwork. Studies showed the drawings were created tens of thousands of years ago, before human history was written. The United Nations' cultural agency UNESCO lists the cave as a World Heritage Site. They say that the drawings form a remarkable expression of early human artistic creation of grand excellence and variety. The Chauvet Cave has been named after the explorer who first entered it. However, its environment and drawings are too fragile to be visited by human beings. So the cave is closed, and only people there for scientific purposes can go inside and see the artwork. However, French authorities asked experts to create an exact copy of the cave, called Pont d'Arc Cavern. The copy, which we also called replica, cost more than 59 million dollars to build. It opened at the end... Question: The purpose of creating Pndt d'Arc Cavern is to _ . Answer:
OPTIONS:
- show admiration for the earliest artists in Europe
- arouse visitors' awareness of protecting ancient art
- offer visitors chances to view the wonderful artwork
- collect money for the perseverance of the Chauvet Cave
offer visitors chances to view the wonderful artwork
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