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
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
举一反三
- The ocean ______ 70 percent of the Earth’s surface, but contains about 20 percent of the Earth’s total estimated species. A: takes up B: fixes up C: stirs up D: patches up
- 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
- Earth's outermost layer, consisting of the crust and upper mantle, is called the lithosphere.
- According to Laozi, Dao is the mother of heaven and earth, the origin of all things. ( )
- _____ is covered with heavy snow. A: The earth’s surface B: The surface of earth C: The surface earth D: The earth surface