Suppose that chemical composition is uniform among stars formed from the same cloud of gas
Algol A and Algol B had the most similar compositions.
B. Algol A and Algol C had the most similar compositions.
C. Algol B and Algol C had the most similar compositions.
D. Algol A, Algol B, and Algol C had the same composition.
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机械工程控制论是研究以机械工程技术为对象的控制论问题。()
并联校正按校正环节的并联方式分为反馈校正和顺馈校正。()
THERP方法是()提出的,其主要设计工作在20世纪70年代完成,但直到1983才最终成型。
闭环控制系统的基本工作原理是不断地检测偏差并纠正偏差,当无偏差时,则该系统的工作状态是稳态。()