难选氧化铜采用酸浸出时,常采用的浸出剂有()。 ["盐酸","磷酸","碳酸","硫酸"]
凸焊类型有()。 ["单点凸焊","多点凸焊","环焊","滚凸焊","双面凸焊"]
测得某组4个标准马歇尔试件的稳定度分别为8.76KN、9.22KN、8.27KN、9.16KN、,流值为1.75mm、1.86mm、2.06mm、2.07mm、,则该组试件的马歇尔稳定度结果为()。 ["8.27KN","8.85KN","9.22KN","8.73KN"]
开展5S活动是改善班组现场管理的基础,所谓5S是指()。 ["整理","整顿","清扫","清洁","素养(保持)"]
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