B．By talking to the machine.

　　C．By moving his hand.

　　D．By using his mind.

　　答案　D　[细节理解题。由第三段内容．..Tavella operated the wheelchair just by thinking about moving his left or right hand.

　　He could even talk as he watched the vehicle and guided it with his thoughts.可知选D。]

　　50.Which of the following shows the path of the signals described in Paragraph 5?

　　A．scalp → computer → cap → wheelchair

　　B．computer → cap→ scalp → wheelchair

　　C．scalp → cap→ computer → wheelchair

　　D．cap → computer → scalp → wheelchair

　　答案　C　[细节理解题。由第五段前三句可知选C。]

　　51.The team will test with real patients to ________.

　　A．make profits from them

　　B．prove the technology useful to them

　　C．make them live longer

　　D．learn about their physical condition

　　答案　B　[细节理解题。

　　由最后一段中的One is testing with real patients, so as to prove that this is a technology they can benefit from.可知选B。]

　　E

　　Archaeologists said Stonehenge，Britain's most famous prehistoric monument，may have been an ancient pilgrimage(朝圣)site for the sick who believed its stones had healing qualities.

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