题目内容

影响围岩稳定性的基本要素有哪些?

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Pressureinahydraulicsystemisgeneratedby()toflow.

A. acceptance
B. immunity
C. resistance
D. compliance

()ispreferedtobeusedinacar'senginelubricationsystem.

A. Gearpump
B. Vanepump
C. Pistonpump
D. Screwpump

()areusedinhighpressureapplications.

A. Gearpumps
B. Vanepumps
C. Pistonpumps
D. Alloftheabove

Loadcreatespressureonthesystem.

A. 对
B. 错

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