Article: The Himalayas are mountains that are located in South Asia. They are a part of Nepal, India, Pakistan, China and Bhutan. The mountains are the highest in the world, reaching almost 9,000 meters sea level. The Himalayas separate the Indian subcontinent from the inner part of Asia. The word Himalaya means " home of snow". 14 mountains are over 8,000 meters high, among them the K2, Nanga Parbat and Mount Everest, at 8,848 meters, the world's highest mountain. The Himalayas extend over 1,500 miles( 2,400km ) from the Indus valley in the west to the Brahmaputra Valley in the east. Many of the mountain peaks are sacred to the people who live in the surrounding areas . Hindu and Buddhist pilgrims go there and pray to God. The Himalayas belong to the youngest mountain ranges in the world. They were formed when the Indian subcontinent, which was originally a part of the southern landmass, drifted to the north and crashed into Asia. This movement started about 70 million years ago and has been going on up to the present day. The Himalayas are still becoming taller, moving at about 7 cm per year. Earthquakes and volcanoes are evidences that the area is still very active. Glaciers and permanent snow fields cover the higher regions of the Himalayas. They are the source of streams that flow into the two big rivers of the region. The Indus flows to the west and through Pakistan into the Arabia Sea. The Ganges and Brahmaputra flow to the east and get together in Bangladesh. They form the largest delta in the world. Question: How many countries do the Himalayas belong to? Yes or no, is the answer "5"?
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Article: Life has changed in Mexico City. Streets normally filled with people are empty. One of the most popular professional soccer teams recently played a game in an empty stadium that can seat more than100,000 people. It's swine flu that has made life in Mexico City grind to a halt . Seemingly out of nowhere, swine flu has caused confirmed deaths in 12 countries as of April 30. It has sent a wave of alarm around the world. Governments are trying to find ways to prevent further out-breaks. The World Health Organization has raised its swine flu global threat level to five out of six. People may be familiar with bird flu, but they know little about swine flu. Swine flu is a contagious respiratory disease in pigs. It is caused by a type-A influenza virus. Humans can also catch swine flu. The virus causes regular outbreaks in pigs, but people usually do not catch it. However, there have been cases of the virus spreading to people, and then from one person to another. The symptoms of swine flu are similar to the common flu. They include fever, lethargy , lack of appetite, coughing, runny nose, sore throat, nausea , and vomiting . The high proportion of young adults among the deaths is one of several mysteries about this virus. Most of the dead had lung damage. What caused it is not yet known. The virus spreads the same way the common flu does. When an infected person coughs or sneezes around another person, the latter is put at risk. People can get the disease by touching something with the flu virus on it and then touching their mouth, nose or eyes. There are medicines to treat swine flu. Doctors suggest using anti - viral drugs. They keep the virus from reproducing inside the body. Although there are no vaccines for it now, several everyday steps can help prevent the spread of the virus: washing hands frequently; avoiding close contact with people who are sick; and avoiding touching surfaces that might have the virus on it. People may worry that they will get swine flu from eating or preparing pork. In fact,... Question: What can we infer from the passage? Yes or no, is the answer "At present there still aren't effective vaccines for swine flu."?
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Article: Lichens are difficult to see. They don't move. They often mix into the living place. You might not even recognize one if you are looking right at it. Lichens live on rocks, branches, houses, and even metal street signs. You can find these colorful organisms almost everywhere -- from deserts to rainforests, and from Antarctica to Africa. They've traveled in outer space, and some scientists think there might even be lichens on Mars. What you probably don't realize is that a lichen is more than a single thing. It includes two different types of living organisms: a fungus and an alga . Neither of these organisms is a plant, so the lichen isn't a plant either. Through photosynthesis , the alga gets the sun's energy to make food for the fungus, which is the place for the alga to live in. However, the alga cannot leave the fungus. Around the world, scientists have found tens of thousands of types of lichens. Many may not even have been discovered yet. As scientists continue to find new kinds of lichens, they are also working to understand how they are connected to one another. By putting together a lichen family tree, they hope to understand why so many different types of lichens have grown in so many places around the world. Many researchers are trying to understand basic facts about the organisms and their connections. Researchers are also using lichens to examine the health of the environment. Question: Which of the following statements is NOT the scientists' purposes of studying lichens? Yes or no, is the answer "To creat a lichen family tree."?
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