问题:人工呼吸主要有()。A、口对口吹气法B、仰卧压胸法C、俯卧压背法D、侧卧吹气法
Wednesday, September 14, 2022
Thursday, September 15, 2022
Wednesday, September 14, 2022
Thursday, September 15, 2022
问题:一次格子型球磨机球介质充填为()。A、40-45%B、35-40%C、30-35%
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:水的硬度是指水中含()粒子的多少。A、钙、镁B、钠C、铁
Wednesday, September 14, 2022
Monday, September 12, 2022
Wednesday, September 14, 2022
问题:如人员被困地点有压风管,应打开压风管给被困人员输送(),并稀释被堵空间的瓦斯浓度,但要注意保暖。A、氧气B、新鲜风流C、排放瓦斯
Wednesday, September 14, 2022
Tuesday, October 3, 2023
Wednesday, September 14, 2022
Wednesday, September 14, 2022
Friday, July 14, 2023
问题:破碎机型号:PEX—150×750,进料口尺寸:(长×宽)150×750mm;最大进料粒度:()。
Wednesday, September 14, 2022
问题:含有80%游离二氧化矽的粉尘最高允度为()毫克每立方米。A、4B、3C、1
Wednesday, September 14, 2022
Thursday, September 15, 2022
问题:圆锥破碎机规格型号:()短头型。给矿口宽度:50mm;给矿块最大尺寸:40mm;排矿口宽度:3~13mm。
Thursday, December 14, 2023
Thursday, September 15, 2022
Thursday, September 15, 2022