当热力学第一定律写成 dU = δQ – pdV 时，它适用于（）
A. 理想气体的可逆过程
B. 封闭体系的任一过程
C. 封闭体系只做体积功过程
D. 封闭体系的定压过程
The kids never received any professional training previously, but their performance was__（）
A. impressive
B. expressive
C. aggressive
D. innovative
With the rising of China as a world power, the U.S. can no longer___ the world（）
A. dominate
B. influence
C. occupy
D. command
Which of the following is a synonym of the verb “haul”（）
A. tow
B. push
C. press
D. lift
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