【判断题】加废钢、兑铁前,先检査废钢(有无爆炸物 ),确认主控室的( 安全门是否关闭 ),并清走炉前平台的人员后,站在安全位置,用标准手势指挥吊车和摇炉工,缓慢地将废钢或铁水兑入炉内
【单选题】The mountain wind _____ as much as three inches of snow overnight.
【单选题】采用低温处理新鲜果蔬作物内的检疫性有害生物时,理想的温度通常在( )之间。
【单选题】It took them three years _____ this road.
【单选题】It ______ them three years ______ the new school. [ ]
【单选题】It took them three years to pay_______the debt.