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Q The percentage O2 by Weight in atmospheric air is____________?
  • A A. 18%
  • B B. 23%
  • C C. 77%
  • D D. 79%
Previous The commercial sources of energy are____________?
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Word of the Day
11 Jul
Envisage
contemplate or conceive of as a possibility or a desirable future event.
Ϊ―Ω…Ψ§Ω† Ϊ©Ψ±Ω†Ψ§ΨŒ Ψͺءور Ϊ©Ψ±Ω†Ψ§ΨŒ Ψ³ΩˆΪ†Ω†Ψ§

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