試題詳解

73 Which of the following is true about commercial electric airplanes?
(A) United Airlines have announced that they will offer fossil fuel-free domestic flights by 2030.
(B) Sweden and Denmark also declared their plans to use fossil fuel-free airplanes by 2026.
(C) Air transportation is one of the major contributors to the worsening environmental problem.
(D) The aviation sector has released huge amounts of oxygen into the atmosphere every year.