Вопрос № 133731 - Английский язык

Airships are huge balloons with propellers to drive them, and they were once used to carry as many as 200 passengers.
The airships were filled with hydrogen, a light gas. However, hydrogen is also inflammable. There were several disasters in which airships caught fire, and they disappeared by the end of the 1930s.
However, airships are now flying again, but they are not common. They are lifted by helium gas, which does not catch fire.
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  • The airships were lifted by helium gas which is inflammable.
  • The airships were filled with hydrogen which is inflammable.
  • The airships were filled with hydrogen which does not catch fire.
  • The airships were lifted with a light gas which is inflammable.
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Вопрос задал(а): Анонимный пользователь, 24 Ноябрь 2016 в 05:45
На вопрос ответил(а): Бунакова Мария, 24 Ноябрь 2016 в 05:45