【文章內容簡介】 ve multiplied at the expense of longlived animals such as rhinos, which have specialized habitat requirements.The new evidence es from analysis of a data set of 184 studies including almost 7,000 animal species, 376 of which are known to carry pathogens shared with humans. Wild animals at risk of disappearing clue to human activities have been found to carry over twice as many viruses that can cause human diseases as threatened species listed for other reasons. The same is true of threatened species at risk due to loss of habitat.The new study builds on previous research showing how the transformation of land for farming and building cities is favoring the same species everywhere. Animals like rats and pigeons are taking over from less mon ones, which can survive only in certain habitats. When humans transform habitats, more unique species are consistently lost and are replaced species that are found everywhere, such as pigeons in cities and rats in farmland. These survivors appear to be the ones that carry the highest number of diseases. 28. What has the new study found?A. Wild spaces are turned into farmland and cities.B. 75% of new infectious diseases e from animals.C. More and more wild animals spread diseases to man.D. Rats are better at adjusting to new environments.29. How did the scientists e to the conclusion?A. By paring studies. B. By analyzing previous data.C. By doing field research. D. By studying the transformation of land.30. What does the text mainly talk about?A. Habitat transformation disturbs the balance of nature.B. Human activities account for some species dying out.C. City growth has increased the spread of animal diseases to man.D. Shortlived animals have more chances to survive in cities.31. In which section of a newspaper may the text appear?A. Nature. B. Lifestyle.C. Education. D. Culture.DOlder women who walk a little over three kilometers each day might live longer than less active women of the same age, a new study suggests.Many Americans hoping to stay healthy set a daily goal of 10,000 steps, or about eight kilometers. They often have this goal because they are wearing electronic devices which set that target, note researchers in the United States. Their findings appeared recently in the publication JAMA Internal Medicine.But it is not clear how much intensity （強度）or speed matter when counting the health benefits of every step, the researchers write. They add that 10,000 steps per day might not be the right goal for everyone.For the study, researchers observed 17,000 women, all in their early 70s. They asked the women to wear accelerometers for at least four days. Accelerometers are small devices that measure the number of steps and the intensity of movement. The researchers followed up with the women much later, around 4. 3 years later, on average. Since the beginning of the study, 504 women had died. Compared to women who took no more than 2,718 steps daily, the women who took at least 4,363 steps per day were 41 percent less likely to die.“Even a modest amount of steps is associated with lower death rates,“ said I — Min Lee, the lead writer of a report on the study. “The rate of stepping did not matter in these older women： it was the number of steps that mattered.The study had a few limitations. For example, the researchers only measured women39。s movements once, at the start of the study period. It is possible that the women39。s behaviors changed over time. Still, the results are “good news for older adults who may have difficulty walking at faster paces, said Keith Diaz, a researcher at Columbia University. He was not involved in the study.“Any walking is better than nothing, Diaz said by . With even small amounts of walking, your risk of death will be sharply reduced. For those who have difficulty walking, other research shows that any form of aerobic activity provides health benefits, he added. Swimming, bicycling or any form of activity that is continuous in nature will provide h