7 判断 ‌在矿山作业当中 主要应用的是萃取设备 通风排水机械 起重机等设备 ‌ ‌ ‌ Crushers cranes extraction equipment ventilation drainage machinery have found wide applications in mine operations ‌ ‌ ‌ 5分 A B

问答题6 判断 ​中国古代 是从炼锌和炼铁开始从事矿冶行为的 ‌ ​ ‌ The earliest mining metallurgy in ancient China started with iron zinc making ‌ ​ ‌ 5分 A B

问答题5 多选 ‏矿冶机械的发展 正朝着下列哪些方向不断前进 ‎ ‏ ‎ Which of the following directions are the development of mining metallurgy machinery moving fward ‎ ‏ ‎ 5分 A 技术先进性 Advanced technology B 安全可靠性 Safet