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"I think what's most exciting is that we've only just begun,"said Aarynn Cartepostdoctoral researcher at the University of California,There are many more imagesexoplanets to come that will shape our overall understanding of their physics,chemistry anformation.We may even discover previously unknown planets,too."28.What do we know about HIP 65426 b?A.It is twenty times the mass of Jupiter.C.It has a longer history than the earth.B.It was discovered by Webb in 2017.29.What makes it hard to take direct images of exoplanets?D.It was spotted by a telescope in Chile.A.Strong light of the host stars.C.Underdeveloped technology.B.Lack of near-infrared cameras.D.Far distance between the stars.30.What does the underlined word "suppress"in paragraph 5 mean?A.Strengthen.B.Control.C.Prevent..脉容内其D.Adjust..31.What does Aarynn Carter think of the image?A.It shows the way to future observations.B.It is significant to explore the unknown.C.It is very exciting to take the first image.D.It helps man understand the earth better.Scientists from Nanyang Technological University (NTU),Singapore have developed alow-cost device that can make use of energy from wind as gentle as a light breeze and store it aselectricity.When exposed to winds with a speed as low as two meters per second,the device can producea voltage (of three volts and generate electricity power of up to 290 microwatts,which issufficient to power a commercial sensor device and for it to also send the data to a mobile phone ora computer.The light and durable device,called a wind harvester,also diverts (any electricity thatisn't in use to a battery,where it can be stored to power devices in the absence of wind.The scientists say their invention has the potential to replace batteries in powering LED lightsand structural health monitoring sensors.Those are used on urban structures,such as bridges andskyscrapers,to monitor their structural health,reminding engineers of issues such as instabilitiesor physical damage.Measuring only 15 centimeters by 20 centimeters,the device can easily bemounted on the sides of buildings,and would be ideal for urban environments.Professor Yang Yaowen,a structural engineer from NTU,said:"The device we developedserves as a potential alternative to smaller lithium-ion()batteries,as our wind harvester isself-sufficient and would only require occasional maintenance,and doesn't use heavy metals,whichcould cause environmental problems.The innovation has received interest from the industry.The NTU research team is alsokingtowards mmereialisng theirinThe study,which presentnthacoudhelp cudownnasteand findaetiveo for ergyetNTUcommitmentto ou impact n the vot whichis of four humanity'sgrandchallenges that the University seektoaddress through itNTU5steip32.Which is the advantage of the device?A.Being ideal for suburban areas.B.Its low standard for wind speed.C.Being environmentally friendly.D.Its ability to conduct electricity.33.The device can be used in cities toA.replace lithium-ion batteriesB.store energy for LED lightsC.beautify bridges or skyscrapersD.monitor the health of structures英语(四)试卷·第5页(共8页)
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