Oxygen is first in abundance of the Earth’s crust.
举一反三
- Of all the elements in the Earth's crust, oxygen is known to be the more common.（） A: Of all B: elements C: to be D: more
- 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
- Earth's outermost layer, consisting of the crust and upper mantle, is called the lithosphere.
- Where there is an earthquake, energy is ____in one area along a crack in the earth crust. A: ;repelled B: ;released C: ;run D: ushed
- Who is the first woman on earth?