2024届高三下学期金太阳联考开学考试（278C）英语

高三历次考试关注度都比较高，参考价值较大，为更好地帮助2023-2024学年高三师生有效提升各学科备考复习效率，了解各科考点，小编在下文整理了高三各科试题及答案汇总，供大家对照参考!

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Electrically powered vertical-take off-and-landing(eVTOL)aircralt-flying cars are anidea whose time has not quite yet come,but is fast approaching.Many firms are offeringvarious designs.None of these,however,will be Jetson-like family flying cars.Pivotal,based in Silicon Valley,by contrast has crafted something that peoole can purchase and pilotthemselves.Helir is a single-seat vehicle,so "llying motorbike"might,be more accurate.From next yearr many people will be able to order ome for personal use,though they will notbe able to take delivery until June.

Marcus Leng founded Pivotal in 2011,and some back-of-the-envelope caleulations hemade suggested that electric lift-off of a humanrcarrying cralt,using motors powered by theithium-ion batteries ought to work.He thus built a model and flew it in the garden of hishouse in Warkworth,Ontaria.

.Now,after ameliorating it,the firm thinks it has something marketable.The aircrafthas,nevertheless,changed little in its fundamentals over the years.It has two pairs of wingsand eight propellers(螺能桨),making it slightly resemble a squashed "H"when seen in thesky from below.And there is no undercarriage.Instead,its belly is curved in a way similar toa humpback whale's,so it roeks to stability afer landing.

Pilot's licence or not,buyers will still need some training to fly a Helir.Pivotal insistson this.For the same reason.the craft's software will stop the pilot doing anything that doesnot fit its safety rulea.And if,despite this,something does go wrong,it is fitted with aparachute(降落染),

The Helir's top speed is a respectable 100 kph,but fits range is only 30 km.Andrefueling it is a bit of a pain.Filing up from the mains takes four and a half hours,though aspecial higthr power system similar to those employed for clectric cars can bring that down to 75

2024届高三下学期金太阳联考开学考试（278C）英语

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