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  • 更新 2022-09-03
  • 科目 英语
  • 题型 阅读理解
  • 难度 中等
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Parkour is all about throwing yourself quickly and effective past whatever barriers are in your path while maintaining as much force as possible to move forward. It’s a challenge for humans, so how would robots get along? In an effort to push the boundaries of robotic agility(灵活), researchers at the University of Pennsylvania decided to find out by teaching their Rhex robot some Parkour moves.
The Rhex is designed to be a walking robot that can deal with barriers, such as stairs and small stones to accomplish rescue tasks or carry out surveys in difficult areas. While the Rhex has been around for over a decade, a new version called XRL(X-Rhex-Light) is now being taught some new tricks by Professor Daniel Koditschek of the University of Pennsylvania.
The XRL differs from its earlier relatives by using lighter materials and simpler fabrication(装配) methods. A complete shell of carbon fiber board surrounds the XRL framework, and it has only a single battery room. The XRL is 51 cm long, 40.5 cm wide, and the body alone is 10 cm in thickness. Its weight including battery pack is 6.7 kg.
The XRL legs are equipped with force and power sensors(传感器), which allow the work of moving to be analyzed in detail. Among other benefits, the research team found that the response of the legs can be used to give an indication of what sort of surface the XRL is walking on. For example, the XRL responds very differently to stone surfaces and grass ones. Besides, the XRL is equipped with a laser scanner(激光扫描仪) to allow the XRL to move around simply.
"What we want is a robot that can go anywhere," said graduate student Aaron Johnson. "These latest jumps greatly expand the range of what this machine is capable of, as it can now jump onto or across barriers that are bigger than it is."

Why does the passage mention Parkour in Paragraph 1?

A.To compare Parkour with the XRL.
B.To recommeng Parkour to readers.
C.To explain why people like Parkour.
D.To show the Rhex uses Parkour moves.

The Rhex is mainly used to         .

A.do some difficult work
B.attend sports competition
C.conduct university surveys
D.research the XRL further

Compared with the Rhex, the Rhex, the XRL         .

A.has two battery rooms
B.uses heavier materials
C.moves around more easily
D.takes along fewer instruments
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Parkourisallaboutthrowingyours