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
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
举一反三
- Carl Sagan believes that Venus might be colonized from earth because _____
- 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
- The following statement about Venus is wrong () A: Venus is the brightest star in the sky. B: Composition of Venus’ atmosphere is mainly carbon dioxide. C: The surface temperature is about 480 degrees Celsius. D: Venus turns from west to east.
- The atmosphere is as much a part of the earth as _______ its soil and water of its lakes, rivers and oceans. A: has B: do C: is D: are