Acrylamide is a rare and dangerous chemical.
Acrylamide is a rare and dangerous chemical.
中国大学MOOC: Vitamins are chemical.
中国大学MOOC: Vitamins are chemical.
Vitamins are chemical. A: inorganic B: organic C: coordinate D: --
Vitamins are chemical. A: inorganic B: organic C: coordinate D: --
The term processing refers to how materials are made from naturally occurring or man-made chemical.
The term processing refers to how materials are made from naturally occurring or man-made chemical.
chemical
chemical
A chemical is any aspect of a substance which is only seen by means of a chemical reaction (反应).
A chemical is any aspect of a substance which is only seen by means of a chemical reaction (反应).
A chemical compound that contains two atoms of oxygen and one atom of another chemical element is called ______
A chemical compound that contains two atoms of oxygen and one atom of another chemical element is called ______
To identify a substance, chemists observe two distinct types of , physical and chemical, which are related to physical and chemical that matters undergoes.
To identify a substance, chemists observe two distinct types of , physical and chemical, which are related to physical and chemical that matters undergoes.
Nuclear rockets, in contrast to their chemical
Nuclear rockets, in contrast to their chemical
Water is a kind of chemical substance.
Water is a kind of chemical substance.