题目内容

关于疲劳缺口敏感度g的叙述，不正确的是____。

A. .0≤g≤1
B. .g= 0的缺口最不敏感
C. g=1时缺口最敏感
D. 铸铁的g值大于碳钢

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高周疲劳是应力小于，应力循环周数大于的疲劳破坏。

A. σb /106-107
B. σs/ 106-107
C. σb/104-105
D. σs /104-105

低周疲劳是在应力约等于____应力，应力循环周数小于（）的疲劳破坏。

A. σb /106-107
B. σs/ 106-107
C. σb/104-105
D. σs/104-105

静力疲劳应力集中系数Kt=____。

Text APart I (Paras. 1- 3)The president congratulates students on their achievement and reminds students of the fact that their current success was due to _, and that their future is built on ____.