第10题: [单项选择]柱子受偏心压缩时,下列结论中正确的是( )。 A. 若偏心压力作用点位于截面核心内时,中性轴将落在横截面内 B. 若偏心压力作用点位于截面核心的边缘上时,则中性轴将与横截面周边相切 C. 若偏心压力作用点位于截面核心的外部,则中性轴位于横截面之外 D. 若偏心压力作用点位于截面核心的外部,则柱子内不产生拉应力 参考答案:A
第20题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. Keep looking for his wallet. B. Report the theft of the wallet right away. C. Put his wallet in the jacket pocket. D. Be more careful with his wallet. 参考答案:A 答案解析:[听力原文]
M: If I don’t find my wallet pretty soon, I’m going to have it reported stolen.
W: Hold on.