第七篇

• 1、

  Paragraph 1 ________

• 2、

  Paragraph 3 ________

• 3、

  Paragraph 5 ________

• 4、

  Paragraph 6 ________

• 5、

  Unlike traditional lighting, LEDs do not give out

• 6、

  Edison"s bright invention is likely to be outdated

• 7、

  Something unexpected happened during Bower"s exper

• 8、

  Over one quarter of energy consumption for lightin