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[真题密卷]2024-2025学年度学科素养月度测评(五)5英语BT答案

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28.What does the underlined word"unplugging"mean?B.Taking social media breaks.A.Reducing screen brightness.D.Turning off electronic devices29.What does Gen's active monitoring of their sereen time suggest?C.Deleting social media accounts.B.Their awareness of mental healthA.Their escape into technology.D.Their preference for online life.What attracts young users most about Tiktok?C.Their distrust of media.B.Its lively interactions.30.A.Its inspirational videos.D.Its comprehensive contentC.Its educational features.31.What is the main idea of the last paragraph?B.The application of the study.A.The results of the study.D.The significance of the study.C.The limitations of the study.Over 12,000 feet below the Pacific Ocean,in the Clarion-Clipperton Zone (CCZ),Dmillion-yearold rocks cover the seafloor.These rocks,seemingly lifeless,host tiny sea creaturesand microbes in their cracks.Surprisingly,they also produce oxygen,a discovery that challengesthe conventional belief that oxygen production requires sunlight."This was really weird,because no one had ever seen it before,"says Jeffrey Marlow,anexpert in microbes.The researeh team used deep-sea chambers that land on the seafloor and thenmeasured how oxygen levels changed in the chambers over 48 hours.If there are plentifulorganisms breathing oxygen,then the levels would normally decline.But in this case,oxygen wasincreasing.After running many experiments,Marlow and his colleagues concluded that microbialactivity isn't responsible for the phenomenon;instead,the rocks are.According to the study,these rocks,rich in metals,may trigger"seawater electrolysis(f解)，”where unevenly distributed ions(离子)act like a battery,splitting water molecules intooxygen and hydrogen-creating "dark oxygen"without sunlight.What remains unclear is the exactmechanism of how this happens,whether oxygen levels vary across the CCZ,and whether theoxygen plays a significant role in sustaining the local ecosystem.The Metals Company,a deep-sea mining firm,states that mining these rocks could speed upthe transition to battery-powered electric vehicles and claims mining on land would eventually nolonger be necessary.So far,mining in the CCZ is at its early stage,but the United NationsInternational Seabed Authority could start making decisions about mining as soon as next year.Many nations in the South Pacific have supported a pause to mining plans.Environmental activistgroups are calling for a permanent ban,and opponents of the operation fear it could causelong-term damage to the seafloor.In the meantime,scientists are also studying the potential impacts of disturbing a largelyunexplored ecosystem."We don't know the full implications of large-scale mining,but to me thisfinding suggests that we should deeply consider what changing these systems would do to theanimal community,"Marlow says,since all animals need oxygen to survive.32.What does the discovery about the rocks in the CCZ reveal?A.The rocks only serve as habitats for marine life.B.Sunlight is not a necessity for oxygen production.C.Microbes are the main source of deep-sea oxygen.D.The rocks function like batteries generating energy.33.What is still uncertain about the phenomenon described in the study?A.Impact of the oxygen levelsB.Level of oxygen in ecosystemC.Oxygen's impact on marine life.D.Mechanism of oxygen production.【高三英语模拟卷（三）第5页（共8页）】

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