营养干预过程评价的方法有()。 ["观察法","会议交流法","调查法","追踪调查法","比较法"]
距地面()米以上为高空作业。 ["2米","3米","4米","5米"]
关于钢斜梯使用正确的要求有() ["长度不宜大于15m","扶手高度宜为0.9m","踏步高度不宜大于1.2m","梯宽宜为0.6m-1.1m","长度大于15m的应设梯间平台,并连续设梯"]
高炉用水占整个钢铁工业用水量的()。 ["10%~15%","20%~25%","25%~30%","30%~35%"]
关于钢直梯使用正确的要求有() ["攀登高度不宜大于8m","踏棍间距宜为0.3m,梯宽宜为0.6m-1.1m","高度大于2m应设护笼","护笼间距宜为1.5m,直径宜为0.75m,并设横向连接","高度大于15m应设一梯间平台,平台应设防护栏杆"]
行业品牌