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ne everything correctly， the two robot arms would behave as Belle’s arm did， at exactly the same time.
Finally the moment came. We randomly switched on lights in front of Belle， and she immediately moved her joystick back and forth to correspond to them. Our robot arm moved similarly to Belle’s real arm. So did Sriniwlsan’s. Belle and the robots moved in synchrony （同步）， like dancers choreographed （设计舞蹈动作） by the electrical impulses sparking in Belle’s mind.
In the two years since that day， our labs and several others have advanced neuroscience， computer science and microelectronics to create ways for rats， monkeys and eventually humans to control mechanical and electronic machines purely by “thinking through，” or imagining， the motions. Our immediate goal is to help a person who has been unable to move by a neurological （神经的） disorder or spinal cord （脊髓） injury， but whose motor codex is spared， to operate a wheelchair or a robotic limb.
41 Belle would be fed some fruit juice if she
A.grasped the joystick.
B.moved the joystick to the side of the light.
C.sat quietly in a special chair.
D.watched lights on a display panel.
42 The wires fixed under Belle’s cap were connected to
A.a plastic box next door.
B.a computer at Cambridge University，
C.a box of electronics in the booth.
D.a box which， in turn， was linked to two computers
43 Which of the following is NOT true of the robot built by Srinivasan？
A.It was directed by signals converted from the electrical activity in Belle’s brain
B.It converted the electrical patterns into instructions for the other robot.
C.It was six hundred miles away from where Belle was.
D.It could perform the same function as Belle did.
44 Which of the following statements indicates the success of the experiment？
A.Belle responded to the robots successfully.
B.Belle and the robots danced beautifully.
C.Belle and the robots responded to the lights at the same time.
D.The two robots moved the joysticks successively.
45 The short-term goal of the research is to help a person
A.whose motor cortex is seriously damaged.
B.who can operate a wheelchair but not a robotic limb.
C.who has spinal cord injury but is able to move a wheelchair.
D.who is unable to move but whose motor cortex is not damaged
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How Did She Conquer the Americans？
African-American talk show queen Oprah Winfrey is the world’s most powerful celebrity， according to Forbes magazine.______（46）
Winfrey， 51， draws 30 million viewers weekly in the United States. Her talk show reaches 112 countries. She earned US$225 million over the past 12 months to rank second in celebrity riches.
The annual Forbes list gives most weight to annual earnings.______（47）
“After 21 years， her exciting chat show still rules the airwaves. It created new celebrities and hundreds of millions of dollars in profits，” the magazine said.
Winfrey is most popular with her popular talk show “The Oprah Winfrey Show”。 She can always attract the superstars and let them open up to her intimate interviewing style.
Last month， American actor Tom Cruise， 42， surprised fans when he celebrated his new romance with 26-year-old actress Katie Holmes. He jumped up and down， shouting “I’m in love.” Only a few years ago， Cruise and his ex-wife Nicole Kidman appeared separately on the same sh