Carl Sagan believes that Venus might be colonized from earth because _____
举一反三
- 2. Carl Sagan believes that Venus might be colonized from earth because ____. A: it might be possible to change its atmosphere B: its atmosphere is the same as the earth’s C: there is a good supply of water on Venus D: the days on Venus are long enough
- Professor Carl Sagan believes that Venus might house the people from the earth as long as ________. A: we fire the rockets containing algae into the atmosphere of Venus B: we change Venus temperature C: we make it possible to rain on Venus D: we change the atmosphere on Venus
- Carl Sagan suggests that modem man ______. A: is very confused about the origin of the Earth B: might possibly reach life outside the C: believes it is possible to step off the Earth D: is historically incapable of exploring the universe
- From the passage we understand that Carl Sagan writes ______. A: forcefully and complexly B: elaborately and literally C: simply and humorously D: snobbishly and cleverly
- What is the main idea of Pale Blue Dot by Carl Sagan?