问题 更新时间2023/4/3 12:59:00 31. (单选题)Our country’s iron and steel industry ( ) very rapidly for about 20 years .(本题1.0分) A、 have been developing B、 has been developing C、 have being developed D、 has being developed 答案 登录 注册 标准答案:B 出自:青书学堂 >> 河南城建学院大学英语四