I must hold（）for any damage which may result from the accidents you have caused. ["your responsible","you responsible","you are responsible","your are responsible"]
Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?（） ["Increased suction head pressure","Decreased feedwater temperature","Pump recirculating line being open too much","Excessive feedwater temperature"]
通过经营租赁，承租人可以取得的优势是（） ["只需支付比较低的租金","不必承担资产所有权上的风险","可以获得维修和保养的服务","可以短期试用一设备"]
脚手架基础上部应安放立杆垫板（金属垫或木板垫），高出基础应大于（）mm，当使用木垫板时必须增设金属底座。 ["30","40","50","60"]
若按气瓶的设计压力分类，气瓶可分为（）气体气瓶等。 ["A.惰性","B.易燃","C.低压","D.有毒"]
简述合用导焦集尘的操作步骤。
