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CA mucus-excreting(分泌黏液的)robot with a single large foot.can effectively imitate the waysnails()move over surfaces-even steep ones."I always say that snails are like Michael Jackson to me.You don't see how they move,butsomehow it is happening,"said Saravana at the University of Southern Denmark.Fascinated by theshelled creature.Saravana and his colleagues wanted to build a version of a snail's single large,soft footand use it as the basis of a robot that moves like a snail.During his presentation,Saravana told that the team chose to build the foot from a soft material thatcould be blown up by small air pumps.He says that while the chemical properties of snail mucus havepreviously been studied in detail,the way the snail's foot moves had only been inferred on the basis ofbiologists'observations.Now Saravana's team studied snail's foot moves further and applied them intheir experimental robot,which could also excrete mucus,and saw it successfully move forward and maketurns without falling over.It even managed to move up steep surfaces in some experiments.saysSaravaha.Although the robot is still at the experimental stage,Saravana hopes that it will become the firstever robot that drives itself forward like a snail.To make it more self-contained,the team isexperimenting with putting the pumps in a snail-like shell on top of the robot.The shell-a slightlyoversized plastic replica()of a real snail shell-can also house electronics for remotelycontrolling the robot,and a system for releasing mucus beneath the robotic foot,just like a real snail.The team's final goal,however,is to make the robot's foot even soft er and more similar to realsnails,whose bodies are mostly made of water.The researchers hope that a robot that successfullymoves on mucus could inform the design of soft medical robots that could eventually move inside thehuman body where mucus is also abundant.28.Why does the author mention Michael Jackson in paragraph 2?A.To stress snails'great influence on him.B.To describe snails'special way of movement.C.To show snails'popularity among researchers.D.To distinguish humans from other living creatures.29.What had been well explored before Saravana's research?A.Snail's evolution.B.Snail-like robots.C.Snail's eating habits.D.Snail mucus.30.Which part of the robot contains a system responsible for mucus release?A.The foot.B.The electronics.C.The shell.D.The eyes.31.What field is most likely to benefit from the robot?A.Disease detection.B.Ecological conservation.C.Athletic training.D.Mental treatment.
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