中国大学MOOC: Water i________ a liquid made up of molecules of hydrogen and oxygen in the ratio of 2 to 1.
举一反三
- Scientists figured out that human bodies are basically made of（） A: hydrogen, carbon, nitrogen, and oxygen atoms B: water vapor, ammonia, carbon dioxide, methane and hydrogen C: biomolecules and water D: evolutionary molecules
- Water __________ oxygen (氧) and hydrogen (氢).
- 中国大学MOOC: When water cools, but does not freeze, the molecules move ______________ and take up ______________ space.
- Manufacturers of hydrogen generators have developed methods to use lower amounts of electricity to split water into hydrogen. Different electrolytes or catalysts are used in _______ the bonds between hydrogen and oxygen atoms that make up water.
- Water is a simple compound of two atoms of hydrogen and one atom of oxygen