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
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
B
举一反三
- Carl Sagan believes that Venus might be colonized from earth because _____
- 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
- This passage mainly talks about () A: the origin of the earth B: the origin of the ocean C: the history of the earth D: the forming of the earth’s crust
- Beneath our feet ____ that our life depends on for food and clothing. A: the earth lies B: lies the earth C: lie the earth
内容
- 0
It is possible to use satellites to predict earthquakes because satellites ________. A: take pictures of the Earth B: catch radio waves sent from the Earth’s surface C: are sensitive to Earth’s movements D: see almost the entire Earth
- 1
A variety of gases trapped in the Earth’s atmosphere can ensure life on Earth because they are ______.
- 2
The earth is about ______ as the moon.
- 3
The earth is about ______ as the moon.
- 4
How much energy given off by the sun reaches the earth A: 100 % but indirectly B: 5 % C: 50 % D: only a very tiny amount