It is hoped that man will someday inhabit other planets.
举一反三
- Scientists cannot _______ the existence of life on other planets.
- What kind of planet elsewhere in the universe can support life A: Those double stars' planets. B: Those planets much hotter than our earth. C: Those planets similar to the earth. D: Those planets very close to their suns.
- Is the space travel to other planets safe?
- The sentence "He cannot help it" (ParA．3, Line l) most probably means " （）". A: man cannot avoid destroying the environment B: man cannot obtain resources he needs from other planets C: man cannot survive for a long time D: man cannot help to create a new environment
- The solar system in astronomy consists of the sun and its planets. EXCEPT （）, all the planets got their names from Greco-Roman mythology. A: Mars B: Earth C: Venus D: Jupiter