When Japanese scientists invented the self-timer function on cameras in 1978, they never could have imagined just how popular it would be 30 years later. Currently, millions of young Chinese use the feature to take photos of themselves and post them online for the world to see. Websites such...
With the help of photographers, scientists can take pictures through microscopes and telescopes. Deep-sea divers take pictures of ocean plants and animals, while astronauts take their cameras into space.”可知,在摄影师的帮助下,科学家们可以通过显微镜和望远镜拍摄照片、深海潜水员能拍摄海洋植物和动物的...
Youmustfeelcurious好（奇的）toknow31thegreenmachineis.Nowherearesomethings32thegreenmachine.NicholasNegroponte33histeamofscientistshaveinventedanewtypeofcomputer.Asaresult,manypoorkidswillhavetheirownlaptopcomputers.Negroponteworksatauniversity.Hestarted34organizationcalledOneLaptopPerChild（OLPC）.ThepeopleatOLPCdont...
－___，he is a talented runner.A.Without doubtB.For exampleC.Once in a whileD.All of a sudden.35.___ is said that walking is one of the best ways for people to keep healthy.A.WhatB.ThisC.ItD.One36. -I suggest that you start ___ little later to avoid the heavy traffic.－Y...
Why Were Words Invented? It was far from an inevitability that humans would develop language. In fact, of all the millions of species of animals on earth, we’re the only ones who ever developed the ability to speak. This has led many scientists to wonder:whydid language evolve? There ar...
Recently, Australian scientists learned something about magpies' (喜鹊) when they tried to fix trackers (安装置跟踪器) to them to learn more about their habits. The birds were Australian magpies. They're small and quite clever. They live in groups and work together to protect the area they ...
B Recently, Australian scientists learned something about magpies(喜鹊)when they tried to fix trackers(安装跟踪器)to them to learn more about their habits.The birds were Australian magpies. They're small and quite clever. They live in groups and work together to protect the are a they live ...
Wanttotakeyourtemperature?Usuallyyouneedtoputathermometerunderyourarmpit(腋窝).Andyouneedtostaystillforminutes.Nowscientistshaveinventedtheno-touchthermometer.Putthethermometer2.5cmfromyourforehead;pressthebuttonandyoucangetthereading(读数)intwoseconds. Usefulalarmclock Itshardtobelievethatanalarmclockcannotonlybebea...
When were birthday parties invented?News By Kristina Killgrove published February 17, 2025 Although many researchers assume that birthday celebrations date back to the ancient Egyptians, the earliest textual evidence of a birthday party proves these annual events are much older....
Thescientistswhodidthestudythinktherearesomereasonsforthebigfallinfitness.First,toomanyoftoday’skidsareoverweight(超重的).Thatmakesitharderforthemtorunfast. Second,kidstodaydon’tgetenoughexercise.Doctorssaykidsshouldgetatleast60minutesofexerciseaday.That’swhyitisimportantforschoolstohaveP.E.classes. Sowha...