题目内容

Differential form______

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When a system in a given initial state experiences a series of processes and returns to the initial state, the system undergoes a _______.

A. system
B. surrounding
C. process
D. cycle

In an isobaric process, the _______ remains constant.

A. temperature
B. pressure
C. volume
D. entropy

The conservation of energy principle states that during an interaction, energy can change from one form to another but the total amount of energy _______.

A. remain constant
B. increase
C. decrease
D. fluctuate

A _______ consists of a fixed amount of mass, and no mass can cross its boundary.

A. closed system
B. open system
C. control volume
D. cycle