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debeen able to obtain water from desert air,but these methods have low yiclds()anduse lots of energy.In fact,this gel is a great improvement from previous waterharvesting technologics.The maximum water harvested has been 5.87 liters in placeswith relative humidity.This new gel doubles this amount,uses no energy and is simple to operate and itcan be molded into a shapeor size that best suits the user.Scientists are planning onmaking a thicker gel that will increase the yield,which is most important in makingthis technology a practical solution to drought().Easy-to-use and inexpensive,thehope is that this super gel will offer access to clean drinking water to dry places aroundthe world.28.What can we infer from Professor Guihua Yu's words?A.He is in charge of the research.B.He is promoting this achievement worldwide.C.He has been concerned about drinking water safety.D.He speaks highly of the new technelogy.29.What does the underlined word "harnessed"in Paragraph 4 probably mean?A.Used.B.Enjoyed.C.ConsideredD.Shared.30.What do researchers think of getting fresh water from fog?A.It is workable.B.It has limitations.C.It is of great importance.D.It has a bright future.31.What is the key to making this new technology workable?A.Sufficient funds.B.Experienced researchers.C.Increased output.D.Easy operation.◇The world's first named heat wave hit Seville,Spain,pushing temperatures past 110degrees Fahrenheit and earning the most severe tier()in the city's new heat waveranking system.Heat waveZoe"has brought burning temperatures to the southern partof the country for the last few days,particularly the area where Seville is located.Zoe is the first named heat wave to hit Seville sinee it officially used a new systemlast month to name and rank heat waves,similar to hurricanes(Climatewire,June 22).Only the most severe heat waves get names,named this year in reverse()alphabetical order.After Zoe come Yago,Xenia,Wenceslao and Vega.The worst of theheat is expected to begin tapering off()today,but it has already posed a significantrisk to human,health.Seville's new ranking system takes a three-tiered approach to categorizing heatwaves,with Category 1 as the lowest ranking and Category 3 as the most severe.Thesystem has specifie criteria for each category,involving not only daytime temperatures,but also nighttime lows,humidity and the heat's expected effects on human health./号卷·A10联盟2023届高三开学摸底考·英语试题第6页共10页