【文章內(nèi)容簡介】 de treatment to neural(神經(jīng)的)diseasesand that may one day bepowerful enough to put humanity on an equal footing with possible future super intelligent puters.Not that it39。s anywhere close to that yet.In a video Friday obviously aimed at seeking new employees, Musk showed off the second version of the Neuralink, a device about the size of a large coin. It39。s designed to be put in a person39。s head. An earlier version of the device has to be placed behind an ear like a huge hearing aid.But the young pany is far from having a mercial product, which would involve plex human trials and governmental approval. Friday39。s video showed three pigs. One, named Gertrude, had a Neuralink device in its brain.Musk, a founder of both the electric car pany Tesla Motors and the spaceexploration firm SpaceX, has always been worried about that smarter AI machines will outwit humans. His solution? Link our brains to puters so we can keep up with or even win over them in intelligence!Musk urged coders(程序員)，engineers and especially people who have actually created a product to apply.You don39。t need to have brain experience,“ he said, adding that this is something that can be learned on the job.Connecting a brain up directly to electronics is not new. Doctors have already put similar devices in brains to treat such conditions as Parkinson39。s disease. In 2016, researchers reported that a man regained some movement in his own hand with a similar brain implant. But Musk39。s proposal goes beyond this. Neuralink wants to build on those existing medical treatments and work on devices that could link our brains to puters one day.28. What can we learn about the first version of the Neuralink?A．It is smaller than a hearing aid. B．It can be put in a person39。s head. C．It has to be placed behind the ear. D．It is already available at the market. 29．Which of the following can replace the underlined word “outwit” in paragraph 6?A．Copy. B．Defeat. C．Understand. D．Destroy. 30．What kind of candidates does Elon Musk particularly want?A. Someone who also wants to create the same device.B. Doctors who already know how to treat brain diseases.C. People who have already designed some unique product. D．Engineers who are good at linking brains to puters. 31．Where is this text likely from?A．An advertisement. B．A test report. C．A science fiction. D．A news report.DWhat happens when you cross stem cells from a frog heart and frog skin? Not muchthat is, until you program those cells to move. In that case, you39。ve created a xenobot, a new type of organism that39。s part robot, part living thing.Now a team of scientists has used living cells from frog embryos and assembled them into entirely new lifeforms. These millimeterwide xenobots can move toward a specific target and pull themselves through after being cut.These are novel living machines, says Joshua Bongarch a puter scientist and robotics expert at the University of Vermont who coled the new research. They39。re neither a traditional robot nor a known species ofanimal. It39。s a new living, programmable organism.Xenobots borrow their name from Xenopus laevis, the name for the African clawed frog from which the researchers harvested the stem cells. They bined together well two different kinds of cellsheart and skin cells. The heart cells are petent in expanding and contracting, which aids the xenobot in lootion, and the skin cells administer structure. Besides, they can39。t acplish tasks without the help of puters.By studying these curious organisms, researchers hope to learn more about the mysterious world of cellular munication. Plus, these kinds of roboorganisms could possibly be the key to drug transmission in the body or greener environmental cleanup techniques.“Most technologies are made from steel, concrete, chemicals, and plastics, which degrade(降解)over time andcan generate harmful ecological and health side effects the authors note in a research paper. When these xenobots finally do stop working, they fall apart harmlessly.“Promising as these organisms are, when we start to mess around with plex systems that