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A.FavorableB.Negative.C.UnconcernedD.Neutral.DLiving robots can reproduce on their own in a dish.This is not a science-fiction movie,but the result of a newresearch.Xenobots,a type of tiny robot,were first created in 2020,using cells taken from the embryo (of anAfrican frog species.Under the right lab conditions,the cells formed small structures that could self-assemble)move in groups and react to their environment.Now,the researchers have found that xenobots can alsoself-reproduce,according to the journal-New Scientist.Xenobots step over an unusual line.Are they living organisms or robots?They are organisms because they aremade of stem cells and can reproduce.But they are also robots because they can move on their own and performphysical labor,co-author Sam Kriegman told The Washington Post."People have thought for quite a long time that we've worked out all the ways that life can reproduce or copy.But this is something that's never been observed before,"co-author Douglas Blackstone,a senior scientist at TuftsUniversity in the US,told Science Daily website.The ability to copy adds a new layer of potential function to the robots.Kriegman told The Washington Postthat while xenobots are not yet commercially useful,they have the potential to offer a number of services,fromcleaning up microplastics in the ocean to safely delivering drugs to a specific spot in a person's body.However,the creation of xenobots comes with concerns.Some think more advanced future xenobots,especially ones that live longer and reproduce,could out-compete other species,according to The Conversation,anAustralia news media.Researchers think these risks are manageable."If you change the amount of sodium (in that waterto be too high or too low,they'll die,"Kriegman told The Washington Post."If there's a piece of copper,a kindof metal,in the dish,they'll all die.It's an extremely controllable,stoppable and safe system."32.What are xenobots?()A.Robots first discovered in 2020.B.Robots from a sci-fi movie.C.Organisms made of embryos.D.Organisms as well as robots.33.What is the promising benefit brought about by xenobots?()A.Promoting commercial products.B.Offering some household services.C.Delivering medicine inside a patient.D.Cleaning up huge plastics in the ocean.34.What can you infer from Kriegman's words in the last paragraph?()A.Xenobots die hard in water.B.Xenobots won't pose a threat.C.Xenobots are made of copper.D.Xenobots have a safe system35.What is the purpose of the passage?()A.To inform us of the creation of Xenobots.