Through exposure to air, water, and organic matter, rocks _____ changes known as weathering.
举一反三
- How is rabies transmitted A: through the bites of rabid animals B: through direct contact C: through water D: through the air
- Organic chemicals mainly come from oil, natural gas, and . A: metal B: air C: water D: coal
- Air pollution is becoming worse. As is known to all, air to us is ________ water to fish. No one can imagine how human being can live without air.
- When cutting through Yuleishan Mountain, the workers used fire to heat stones and water to cool the rocks to. They applied the principle of thermal _____________ and cold contraction into practice.
- Wherever there is matter, there is energy; all changes of matter _______ changes in the form of the energy.