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30.We can infer from the text that Deng Thiak AdutA.came from SudanB.was sold to the armyC.was once sent to Australia to fightD.is the most successful of his school31.What does the underlined word "outlets"in the last paragraph refer to?A.Book stores.的江代亲因C.University ads.。B.Newspapers.D.Moving stories.DDurian (is probably the smelliest fruit in the world,letting out an unusualunpleasant smel which would make anyone bring up.However,nobdy was aware of whatgave this fruit its uni smellsoteam ofreserersm Singpore decided to take a lookat its genome(基因组)and find out,.Durian is well-known throughout Southeast Asia as the king of fruits,mostly because ofits awful appearance and smell.However,the origin of this unpleasant smell wasunknwso researchers decided to map the genome of the fruit,and find the gene that conoed it.Agroup of genes,volatile sulfur compounds(含硫化合物),became very active in the fruit,andthey were found responsible for resulting in the unpleasant smell.The fruit confuses everyone with a sulfuric smell,like rotten onions and ingredients.Thesmell lasts long,mostly because the fruit contains more volatile sulfur compounds.Otherspecies usually benefit from two gene copies at most,but durian has four,leading to thestriking smell.However,this smell might be an advantage for durian in the wild.Although we find itunpleasant,many animals might be attracted by it.If they eat the fruit,then they can easilyspread its seeds everywhere,thus contributing to the distribution of the species.The mapping of the durian genome also showed some other information on the species.First of all,the fruit has an impressive number of genes,namely 46,000.Also,with the helpof these genes,they saw how it evolved,and discovered it was related to the cacao tree.All theother discoveries have been published in the journal Nature Genetics.Despite the striking smell,many people actually enjoy eating the fruit.However,not alldurian species are edible,and some of them may even cause damage to our health.Even so,the fruit is often imported,significantly contributing to the economy.32.What give durian its unique smell?A.Onions nearby.B.Two gene copies.C.Rotten ingredients in it.D.Volatile sulfur compounds.33.What does the underlined word "evolved"in Paragraph 5 probably mean?A.developedB.escapedC.predictedD.tolerated34.What can we infer from the text?A.No birds enjoy eating durian.B.Durian can be planted all over the world.C.Some of durian species can not be eaten.D.Durian has no relationship with the cacao tree.35.What's the best title for the text?A.What's Durian?B.The Influence of the SmellC.The Distribution of DurianD.The Mystery of the Unpleasant Smell of Durian英语·QG·69
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