Which of the following descriptions is correct?
A: The microscopic viewpoint studies the large-scale properties of matter (temperature, pressure, volume, etc.).
B: The part of the universe under study in thermodynamics is called the system; the parts of the universe that can interact with the system are called surroundings.
C: For an open system, only matter can be transferred between system and surroundings.
D: A closed system must be an isolated system, but an isolated system may not be a closed system.
A: The microscopic viewpoint studies the large-scale properties of matter (temperature, pressure, volume, etc.).
B: The part of the universe under study in thermodynamics is called the system; the parts of the universe that can interact with the system are called surroundings.
C: For an open system, only matter can be transferred between system and surroundings.
D: A closed system must be an isolated system, but an isolated system may not be a closed system.
举一反三
- The Atlantic Ocean is ( ). A: a closed system B: an open system C: an isolated system D: a homogeneous system
- 中国大学MOOC: A closed system must be an isolated system.
- (multiple choices)Which of the following statements about our nervous system are correct? A: Our nervous system includes the central nervous system and the peripheral nervous system. B: The central nervous system only contains our brain. C: The somatic nervous system is part of the peripheral system. D: The autonomic nervous system can be divided into the sympathetic and the parasympathetic system.
- (multiple choices)About our nervous system, which options are correct? A: Our nervous system includes the central nervous system and the peripheral nervous system. B: The central nervous system is only the brain. C: The somatic nervous system is one part of the peripheral system. D: The autonomic nervous system can be divided into the sympathetic and the parasympathetic system.
- The surroundings include everything external to the system，and the system is separated from the surroundings by the system boundaries.