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1、2024年衡水金卷先享题英语四
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29.The special skill of dragonflies is their ability toA.glide to safetyB.avoid tricky situationsC.perform observation tasksD.adjust themsclves to stay'stablc30.What is the author's attitude towards winged drones?A.Skeptical.B.Uncertain.C.Supportive.D.Conservative.31.Which can be a suitable title for the text?A.Winged Drones:Still a Long Way to GoB.Javaan Chahl:An Innovative Leader of AcronauticsC.A Dragonfly's Flying Techniquc:Perfect for DronesD.The Code of Nature:A Solution to NASA's Space ExplorationDA method to transform a commonly thrown-away plastic to a resin (used in 3Dprinting could allow making better use of plastic waste.A team of Washington State Universityresearchers devcloped a simple and efficient way to transform polyactic acid (PLA)(),abio-based plastic used in products such as filament,plastic silverware and food packaging to high-quality resin."We found a way to immediately turn this into something that's stronger and better,and wehope that will provide people with the inspiration to upcycle this stuff instead of just throw itaway,"said Yu-Chung Chang,a postdoctoral researcher in the WSU School of Mechanical andMaterials Engineering and a co-corresponding author on the work."We made stronger materialsjust straight out of trash.We believe this could be a great opportunity."Bio-based,PLA,which is categorized as a number 7 plastic,can float in fresh or salt waterfor a year without degrading.It is also rarely recycled because like many plastics,when it's melteddown and re-formed,it doesn't perform as well as the original version and becomes less valuable."It's biodegradable and compostable,but once you look into it,it turns out that it can take upto 100 years for it to rot away in a landfill,"Chang said."In reality,it still creates a lot of pollution.We want to make sure that when we do start producing PLA on the million-tons scaie,we willknow how to deal with it."While the researchers focused on PLA for the study,they hope to apply the work topolycthylene terephthalate(PET)(※纶树胎)，which is more common than PLA and has a similarchemical structure and present a bigger waste problem.They have filed a temporary patent and areworking further to optimize the process.The researchers are also looking into other applicationsfor the upcycling method.32.What can the method help do according to paragraph 1?A.Solve financial crisis.B.Change waste into wealth.C.Control plastic production D.Delermine 3D printing skills33.What does Yu-Chung Chang think of the method?A.Promising B.Unrealistic C.Imaginable D.Common34.Which of the following is a feature of mtmber 7 plastics?A.Invaluable to recycle B.lasy to deal withC.Iard to break downD.Difficult to sort out.35.What is the text mainly about?