Cathy is a tetraplegic．She has not been able to move her arms，legs or speak since suffering a stroke（中风）nearly fifteen years ago．Recently，she learned how to control a robotic arm using her thoughts．She now can use brain activity to serve herself a drink．
The American woman is one of two people who took part in a research project known as BrainGate2．The researchers have spent years studying how to help people who are disabled regain movement in their arms and legs．
John，who is a neuroscientist（神经科学家）and also was part of the project，said，“Our idea is to avoid that damaged nervous system and go directly from the brain to the outside world，so the brain signals can，not control muscle，but control machines or devices（设备）like a computer or a robotic arm．”
The two disabled people had small sensors connected to the part of the brain that controls movement．The devices measured brain activity and sent that information to a computer．The computer has special software that turns the information into digital commands for operating other devices．The researchers used a highly developed robotic arm to recreate human actions．
The BrainGate team had its first success in 2006．A victim was able to use the brain—computer system to control a computer mouse．John says the latest development using robotic arms is a major victory．
A video of the latest experiment shows Cathy using the robotic arm to pick up a cup of coffee．She guides the cup toward her mouth，moves it forward and drinks through a straw．
Lead researcher Leigh Hochberg said it was an unbelievable moment?
The research team carded out almost 200 tests with two different robotic arms，which were able to pick up their target objects 43％to 66％of the time．
The researchers are calling the information very promising．But they say it will take years to fully develop the technology for everyday use．
71．What can we know about Cathy from this passage?
A．She is an expert about the stroke．
B．She is a disabled woman who can't walk at all．
C．She is a scientist and is also part of the project．
D．She is a researcher taking part in the project．
72．How does the robotic arm work?
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73．Why did Leigh Hochberg say it was an unbelievable moment?
A．Because the latest experiment of using robotic arms has succeeded．
B．Because the BrainGate team had its first Success in 2006．
C．Because the two disabled people can move and speak．
D．Because he was part of the project．
74．What can we infer from this passage?
A．The technology had been put into use before 2006．
B．It will be several months before the technology comes into daily use．
C．Quite a few experiments have been carried out for the technology．
D．The two robotic arms couldn't pick up their target objects．
75．What's the purpose of the research project?
A．To help the disabled people to move and speak．
B．To help the brain-computer system to control a computer mouse．
C．To help the disabled people use brain activity to serve themselves a drink．
D．To help the disabled people to get movement like their arms and legs again．
The Ostrich Pillow was created by a European designer，who wanted to find a creative way to provide people with the health and productivity benefits commonly associated with power napping（小憩）．Power napping is as important as normal sleep．Only when you're done with a power nap，are you expected to actually work better．