12.According to the passage, when did scientists begin to realize that more than one ice age had occurred ? A. In the mid nineteenth century B. In the late nineteenth century C. In the early twentieth century D. In the late twentieth century 你的答案: 正确答案:B 题目解析: 登录...
However, over the last 8,000聽years, ice cores have recorded an abnormal increase in greenhouse gases dating from the spread of agriculture in a vast region of the Old World. Indeed, this event may backdate the beginning of human influence on the Earth鈥檚 climate to the early Holocene. ...
【1】What happened when the man was climbing mountainsA.He got trapped in a cave.B.He got lost in bad weather.C.He lost his equipment and food.【2】What caused the loss of the man’s legsA.Low temperature.B.A bad fall in the mountain.C.An unsuccessful operation.【3】What did he...
【2】Why did Sophie bike along the Silk RoadA.Because she got inspiration from Journey to the West.B.Because her parents asked her to do so.C.Because she liked eating grapes so much.D.Because she wanted to write a book about it.【3】What is closest in meaning to the underlined words...
lookingdownfrom ahilltop:“Whenthesun slippedbehindthemountains,itshedarosyglow allaroundthem.Thenafull moonrose.The snow wasmarkedonlybysmallanimals:foxes, coyotes,mice,andvaryinghares,whichturned whiteinthewinter.” 4.WhydidDorothyandRosamondgototheRocky Mountains? A.Toteachinaschool. B.TostudyAmerica...
As I was growing up, we were often on the move. I had to admit that moving so often made me feel lonely. But my mother did everything she could to help me feel happy. In fact, so much traveling was really a good thing because it made us close. I respect my mother so much as...
When did life begin? It is older... Y Ueno - 《J Geogr》 被引量: 5发表: 2011年 Evidence for life on Earth before 3,800 million years ago IT is unknown when life first appeared on Earth. The earliest known microfossils (3,500 Myr before present) are structurally complex, and if it...
I could hardly wait to see Mom’s reaction(反应)when I told her ___ we did it! “When I clap my hands three times, you’ll be back to your usual self,” I said confidently. I clapped loudly as I counted the numbers, ___ Mom continued singing as if nothing had happened. ...
4. How many years did the people spend building The Taj Mahal? A.52. B.22. C.100. D.30.5. Which of the following is TRUE? A.The Taj Mahal was built for an Indian prince. B.The Great Wall is the largest building ever built. C.The Colosseum was opened to the public in 80 B...
【1】When did Henry begin writing his life story? A.After his wife passed away. B.Before his wife passed away. C.When he was at the age of 91. D.After he retired from work. 【2】Which of the following is TRUE according to the text?