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()26.What did Internet companies do for elderly people?A.They offered them smartphones to connect when necessary.B.They increased barrier-free functions in some news apps.C.They provided easier online services for COVID-19 control.D.They downloaded 43 smartphone applications free of charge.()27.Why were Internet enterprises also asked to provide easier online services?A.To respond to the outbreak of the COVID-19 pandemic in China.B.To promote our scientific and technological innovation among the old.C.To serve China's increasing online disabled population properly.D.To guarantee technological innovation could benefit all the people.CIn 1957,English scientist James Lovelock invented the Electron Capture Detector,aninexpensive,sensitive device used to help measure the spread of poisonous man-madecompounds(in the environment.The device provided the scientific foundations ofRachel Carson's 1962 book,Silent Spring,a push for the environmental movement.It alsohelped provide the basis for regulations in the United States and in other nations thatbanned harmful chemicals like DDT and PCBs.Later,his discovery that chlorofluorocarbons(CFCs)-compounds that are used inrefrigerators and air conditioners-were present in measurable concentrations in theatmosphere led to the discovery of a hole in the ozone layer().He also explained that they posed nopossible danger to the planet.A year after his paper in Nature,Mario Molina of the Massachusetts Institute ofTechnology and F.Sherwood Rowland of the University of California at Irvine published a paper in the samejournal detailing how sensitive the Earth's ozone layer is to CFCs.In 1995 they were awarded the Nobel Prize fortheir work in reminding the world of the thinning of the ozone layer.Lovelock later called his conclusion amistake.But Dr Lovelock may be most widely known for his Gaia theory that the Earth acts as a"living organism"that can“control its temperature and chemistry in a state of comfortable stability(稳定性).”As an expert on thechemical composition of the atmospheres of Earth and Mars,Dr Lovelock wondered why Earth's atmosphere wasso stable.He hypothesized()that something must control heat,oxygen,nitrogen,and other ingredients.He presented his theory in 1967.That summer,the novelist William Golding,his friend,suggested the nameGaia,after the Greek goddess of the Earth.The hypothesis may never have moved into the scientific mainstream without the contribution of LynnMargulis,an American microbiologist.In the early 1970s and in the decades that followed,she worked with DrLovelock on specific studies to support this concept.Since then.Dr Lovelock's theory of a self-controlling Earthhas been considered important to understanding the causes and consequences of global warming.()28.What is Paragraph 1 mainly about?A.The functions of man-made compounds.B.The importance of banning harmful chemicals.C.The influence of the Electron Capture Detector.D.The working principles of the Electron Capture Detector.()29.What did James Lovelock once believe to be true?A.It was impossible to find CFCs in thin air.B.CFCs did little harm to the Earth.C.It was impossible to measure CFCs in the air.D.CFCs had little effect on cooling refrigerators.英语A卷第4页（共8页）