A.who developed the device |
B.how the device works |
C.several possible uses for the devices |
D.how much electricity the device can produce |
A.produces power without adding more loads to the walker |
B.can produce more power in a much shorter time |
C.needs to be equipped with a battery |
D.can help the walker wa1k faster |
A.help housewives operate the washing machine |
B.make it much easier for us to go online |
C.produce more electricity than that invented by Larry Rome |
D.be applied in medicine to operate heart pacemakers |
A.First device powered by walking wi1l soon be on the market |
B.Advanced technology brings in a new way to operate heart pacemakers |
C.Device gives new meaning to the idea of power walking |
D.Human energy will become a main source of electricity |