<p>图示变截面短杆，AB段的压应力<img src="https://file.gaojiufeng.cn/learnAppQuestion/ae/6f/ae6f57425189d7e394338f97a1f65c6e.jpg" style="width: 100%;height: auto;">与BC段压应力<img src="https://file.gaojiufeng.cn/learnAppQuestion/ff/c9/ffc93e5af08d08034067e3b3cd4cba26.jpg" style="width: 100%;height: auto;">的关系是： <img src="https://file.gaojiufeng.cn/learnAppQuestion/52/b8/52b8c2fc0f64bfbca2add18f0eebdb43.jpg" style="width: 100%;height: auto;"></p>