题目4单选题
计算梁的抗弯强度<img src="https://tihai-oss-cloud.itihey.com/img/cf9706474d86eaf1f4954fc43de91434.gif">,与此相应的翼缘外伸肢宽厚比不应超过( )A. <img src="https://tihai-oss-cloud.itihey.com/img/426e2218e1ee891d67c2ff7db2069489.gif">B. <img src="https://tihai-oss-cloud.itihey.com/img/3c4b9e07d3612018d38932844475eda6.gif">C. <img src="https://tihai-oss-cloud.itihey.com/img/def2330d32e0a71c60a5707152069c09.gif">D. <img src="https://tihai-oss-cloud.itihey.com/img/63743fcc2a1c8a71668394f53c6643e0.gif">