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In an ordinary bolt, the effect of the impulsive loads applied axially is concentrated on the cross-sectional area at the root of the threads.

A. Yes
B. No

Option A

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When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be __________ the bearing modulus. A. 5 times B. 10 times C. 15 times D. 20 times	A column is known as a long column if the slenderness ratio is A. 40 B. 50 C. 70 D. 100