When Sagan told the director about what the dolphin had done, the director ______. A: didn't seem to think it was unusual B: thought Sagan was joking C: told Sagan about other words the dolphin knew D: asked him if he knew other words

What is the main idea of Pale Blue Dot by Carl Sagan?

Carl Sagan believes that Venus might be colonized from earth because _____

The dolphin leapt up into the air because Sagan was too near the water. A: Right B: Wrong C: Not mentioned

中国大学MOOC: Pale Blue Dot written by Carl Sagan asked us to cherish our earth.

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

It would appear that the public Sagan hopes to attract ______. A: are interested in UFO spotting B: are only interested in science fiction C: are unable to write science fiction D: have a reasonable grounding in science

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

What is the main idea of Pale Blue Dot by Carl Sagan?( ) A: There are a lot of conflicts on our earth. B: Humans have imagined self-importance. C: We should cherish our earth. D: Our planet is a lonely speck.

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