B.the mirroring has become awkward imitation causing offense
C.the lawyer shrugs his shoulders the way the judge does
D.it has been found to be deliberately used
Have you ever been frustrated when left talking to yourself after your mobile phone battery runs out in the middle of a call?
If yes, then here comes some good news.
71Researchers from the Netherlands, France and Portugal announced last week that they have developed very thin solar panels () that can be put on clothes.72
They change light from the sun into electricity.
In about three years, you'll be able to wear a jacket that will recharge your phone as you walk.For camping fans, the development could lead to a tent which charges batteries all day so you can have light or music at night.
73
Pairs of sheets of semi-conducting silicon () are linked together to form the panel.But scientists made them much thinner by using different silicon.74
"This technology will make it easier for people to use clean energy sources," said Gen-it Kroesen, a physicist in the Netherlands who led the team of scientists.But the thin panels are not as efficient as the thicker ones.While some solar panels now operate at an efficiency of about 20 per cent, the new flexible panels are only 7 per cent efficient.But the scientists believe that this is worth accepting for a stronger and more useful panel.
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