填空题 Scientists believe that by raising atmospheric pressure and surface temperature, it is possible to transform the climate of Mars to the point where humans would be able to live there. The process by which a hostile or unsuitable environment is transformed into one that can sustain human life is called terraforming. In addition to potentially providing an alternate home for the people of Earth in the future, this undertaking may also allow scientists to test hypotheses about the process of global warming, which is a highly pertinent issue affecting our planet today.

单选题 Which of the following can be inferred from the passage regarding the Martian atmosphere?

A、 It has a lower pressure than Earth's atmosphere.
B、 It has a higher surface temperature than Earth.
C、 It can most certainly be transformed to be more like Earth's atmospher

【正确答案】 A

【答案解析】According to the passage, it would be necessary to raise the atmospheric pressure of Mars to make it possible for humans to live there, or in other words, to make it like Earth's.

单选题 The passage addresses which of the following consequences of terraforming?

A、 The creation of a more hospitable planet.
B、 The risk of overpopulation.
C、 The elimination of suitable environments.
D、 The depletion of the atmosphere.
E、 The production of greenhouse gases.

【正确答案】 A

【答案解析】According to the passage, terraforming turns hostile environments into hospitable ones by creating environments that can sustain human life.