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Article: Half the world's population could face a shortage of food by 2100 due to climate change, a new report by US scientists warns. Rapid global warming is likely to reduce crop production in the tropics and subtropics , according to Professor David Battisti of the University of Washington. "The most extreme summers of the last century will become common," he says. "We must immediately create crops that can bear heat and drought if we are to adapt in time," he writes in Science journal. "The stresses on global food production from temperature alone are going to be huge," said Mr. Battisti. "And that doesn't take into account water supplies stressed by the higher temperatures." He worked with Professor Rosamond Naylor on Food Security and the Environment, to examine the influence of climate change on the world's food supplies. They predict there is a greater than 90% probability that by 2100, the average growing-season temperatures in the tropics and subtropics will be higher than any temperatures recorded there to date. "We are taking the worst of what we've seen historically and saying that in the future it is going to be a lot worse unless there is some kind of adaptation," said Professor Naylor. "This is a powerful reason for us to invest in adaptation, because it is clear that this is the direction we are going in terms of temperature and it will take decades to develop new food crop varieties that can better bear a warmer climate." "In the tropics, the higher temperatures could be expected to cut production of the primary food crops by 20-40%," the researchers said. Rising temperatures are also likely to reduce soil moisture , cutting production even further. Three billion people live in the tropics and subtropics now, and their number is expected nearly to double by the end of the century. "You are talking about hundreds of millions of additional people looking for food because they won't be able to find... Question: We can know from the text that _ . Yes or no, is the answer "crop failures will be a global problem"?
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Article: The Yale Peabody Museum is open: Monday through Saturday 10:00 a. m. to 5:00 p. M. Sunday Noon to 5:00 p. m. The Museum is closed on New Year's Day, Easter Sunday, Independence Day, Thanksgiving Day, Christmas Eve, and Christmas Day. Admission Fees: $9.00 Adults $8.00 Senior citizens 65 years and over $5.00 Children ages 3 through 18, and college students with ID $4.00 Group admission To receive this reduced admission, groups must make a reservation at least 2 weekdays in advance. Group admission is only available with a written confirmation brought to the Museum at the time of the visit. More attention: Some halls may be closed to the public on weekday mornings during the academic year for school group programs, so we recommend visiting after 1 p.m. on weekdays or at any time on the weekends. There is no cafeteria or lunchroom at the Peabody. Information on local eating places is available through our Restaurant Guide or at the Admission Desk in the lobby. Visitors are welcome to picnic on the lawns around the Museum. Photography with handheld cameras is permitted in exhibition halls for personal use only; photography of The Age of Mammals is prohibited at all times. All other uses require the advance written permission of the Yale Peabody Museum. Highlights Tours of the Museum are offered at no extra charge every Saturday and Sunday at 12: 30 and 1: 30 p.m. These 45minute tours of the Yale Peabody Museum's exhibition halls are led by one of our specially trained volunteer guides. The Museum offers free individual admission on Thursday afternoons from 2: 00 to 5: 00 p.m. during the months of September to June. Admission is free to any individual with a valid Yale ID. Check out a Peabody Museum pass at your local library. A Museum pass will give you $5 off each admission for up to 4 people. Ask for it at your local library. Question: According to the passage, The Age of Mammals is most probably _ in the museum. Yes or no, is the answer "an exhibition hall"?
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Article: Have you ever dreamed about sending a letter to yourself or your friends in the future ? While express mail representing efficiency and speed is prevalent in China , there is another type of mail appearing as a new business : " Future Mail " . " Future Mail " service can make people slow down and let them understand the meaning of " time " in another way . And " Future Mail " letters are " reminders of affection , friendship and love ". Lin Xiaofan , a senior high school student in Hefei , wrote a letter to her mother in advance to express her love to her mother for next Mother's Day . Feng Xiao , a youth who feels pressure despite of some achievements in her career decided to write a letter to herself on her 25th birthday and have it delivered five years later on her 30th birthday through a " Future Mail " . She expressed her thoughts about her present life and her expectations for the future to encourage herself to face up to the challenges of her life with courage . While " Future Mail " is gaining popularity , some people are concerned about what happens if the postal address of the receiver changes or if the company goes broken before letters are delivered . Actually , customers required to complete an acceptance form and make an assessment so they can be _ if their letters or goods are lost or damaged . Most of the business's customers are college students and young white-collar workers . Psychologists said young Chinese might be given a vent to their negative feelings through the service . Most people put their hopes and wishes in the letters so they can experience the connection between " past " and " present " while they receive the letters . It can help people reunderstand the meaning of " time " . Question: Which is NOT the purpose of Feng Xiao's letter ? Yes or no, is the answer "To remind herself of something she must do ."?
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No