The olfactory regions of the nose are yellow, richly moist, and _________. A: fully fatty substances B: full, fatty substances C: full of fatty substances D: fatty substances are full
The olfactory regions of the nose are yellow, richly moist, and _________. A: fully fatty substances B: full, fatty substances C: full of fatty substances D: fatty substances are full
3. It's not a pure substance, () it is made of different substances.
3. It's not a pure substance, () it is made of different substances.
4. Chemicals in the body ________________ our food into useful substances. （分解）
4. Chemicals in the body ________________ our food into useful substances. （分解）
the liver can use amino acids to manufacture a variety of important substances.
the liver can use amino acids to manufacture a variety of important substances.
What substances are in ink today？
What substances are in ink today？
The so-called Chinese “herbal medicine” includes not only herbs but also non-botanic substances.
The so-called Chinese “herbal medicine” includes not only herbs but also non-botanic substances.
Chemistry is the science of substances ___ the science of energy.
Chemistry is the science of substances ___ the science of energy.
The physical properties are those properties of a substance that can be observed with changing the substance into other substances.
The physical properties are those properties of a substance that can be observed with changing the substance into other substances.
Materials are _________. A: the matter of the universe B: these substances having properties that make them useful in structures and machines C: these substances having properties that make them useful in products and systems D: these substances having properties that make them useful in structures, machines, devices, products, and systems
Materials are _________. A: the matter of the universe B: these substances having properties that make them useful in structures and machines C: these substances having properties that make them useful in products and systems D: these substances having properties that make them useful in structures, machines, devices, products, and systems
Materials are _________. A: the matter of the universe B: these substances having properties that make them useful in structures and machines C: these substances having properties that make them useful in products and systems D: these substances having properties that make them useful in structures, machines, devices, products, and systems.
Materials are _________. A: the matter of the universe B: these substances having properties that make them useful in structures and machines C: these substances having properties that make them useful in products and systems D: these substances having properties that make them useful in structures, machines, devices, products, and systems.