28.How does the author introduce the topic in the first paragraph A.By comparing the limitations of existing repellents. B.By directly stating the research team's conclusions. C.By listing statistical data on mosquito-borne diseases. D.By quoting experts'opinions on chemical components. 29.What experimental condition is necessary during capsule formation A.Exposure to light for 24 hours. B.Addition of man-made polymers. C.Immediate freezing after adding oil. D.Continuous stirring at warm temperatures. 30.What is the main advantage of the new fabric compared to traditional repellents A.It combines man-made materials with machine washes. B.It relieves mosquito-borne diseases through reapplication. C.It provides long-lasting protection without frequent reapplication. D.It activates stronger repellent effects during several washing cycles. 31.Which statement best summarizes the new fabric's significance A.It reduces fabric durability by using natural polymers. B.It proves silk protein is worse than man-made polymers. C.It joins environmentally safe materials with modern high-tech. D.It brings down lavender oil's medicinal properties in repellent action. D A recent study by NYU Abu Dhabi reveals that space rays,high-energy particles() from space,may generate the energy necessary to support underground life on planets and moons in our solar system.This discovery challenges the long-held belief that life can only live near sunlight or volcanic heat. The research,published in the International Journal of Astrobiology and led by Dimitra Atri,shows that space rays are not always harmful.In fact,they can help microscopic life( survive.When space rays hit underground water or ice,they break water molecules() apart,releasing electrons().On Earth,some bacteria can use these electrons for energy, just as plants use sunlight.This process,called radiolysis(辐射分解)，can sustain life in dark and cold places without sunlight. Using computers,the researchers explored how much energy this process could generate on Mars and the icy moons of Jupiter and Saturn.These moons are thought to have hidden water beneath their thick ice layers.The study found that Saturn's moon Enceladus has the greatest potential to support life through radiolysis,followed by Mars and Jupiter's moon Europa. "This discovery changes the way we think about where life might exist,"said Atri."Instead of looking only for warm planets with sunlight,we can now consider places that are cold and dark,as long as they have some water beneath the surface and are exposed to space rays.Life might be able to survive in more places than we ever imagined." The study also introduces the concept of the Radiolytic Habitable Zone,which is different from the traditional "Goldilocks Zone".Since space rays are widespread in space,there may be many more life-supporting places in the universe. The findings provide new guidance for future space missions.Instead of only looking for signs of life on the surface,scientists ... ...
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