问答题

在液压传动中，常说的表压力是指（）压力。

答案：相对压力

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《中华人民共和国国家安全法》规定，维护国家安全，应当遵守宪法和法律，坚持（）原则，尊重和保障人权，依法保护公民的权利和自由。

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