学生啦：课时作业（十一）Unit4 SectionⅡGrammar andusage Integrated skillsI.阅读理解Someday,umbrellas may do more than just keep people dry.A researcher in theNetherlands has designed a simple sensor(传感器)that“listens'”to rain.And that sensor can turnan umbrella into a rain-measuring expert.Tools like this can let anyone gauge the weather.That can help scientists make sure thatsatellites and radar (systems that track storms are doing a good job."Rain radar is a beautiful way of seeing where rainfall is up in the air.But you never knowwhere it hits the ground,says Rolf Hut.He designed the umbrella sensor.Researchers want to know how much rain makes it to the planet's surface.Not all rain thatfalls from a cloud reaches the ground.And it can be difficult for radar and satellites to measurethat rain,particularly in cities.A host of big buildings can change how air and rain move during astorm."It also explains why a single,expensive sensor-the kind that might be found at anofficial weather station-won't give accurate citywide data,"Hut says.But by putting a low-costrain measuring tool into people's hands,scientists can learn more about how much rainfalldiffers in these and other hard-to-measure places.On the inside of the umbrella is a small,yellow disk )It is the rainfall sensor.Thesensor is attached to a black Bluetooth headset that sends the collected data to a smartphone.Hut came up with the idea to stick the same type of sensor on an umbrella when he wastalking to kids about science.He showed them a photo of a policeman who was holding anumbrella and talking to a crowd into a microphone.Why not put the two together?He thought itcould make a cool rainfall sensor.When the data of a storm came through,Hut compared the umbrella's new "ear"for rain toofficial rain measuring equipment.And to his delight,he found the umbrella's measurements werepretty good.His next step is to improve the umbrella sensor to be more accurate.1.The purpose of this passage is toA.promote a unique umbrellaB.inform us of a new inventionC.make readers interested in scienceD.praise a researcher for his invention2.The underlined word“gauge”in Paragraph2 most probably means“”A.change B.controlC.measure D.sense3.Why can it be hard for official weather stations to measure the rain in cities?A.Their collected data cannot be sent to smartphones.B.They are lacking in weather measuring equipment.C.Rainfall differs hugely depending on various areas.D.Big buildings influence the move of air and rain.4.What do we know about Hut's new invention?