转炉炼钢硅氧化是()反应。 ["放热","吸热","先吸热后放热","不吸热不放热"]
对检修中的对开式滑动轴承检查时应特别注意哪些情况?
下列海域最容易产生赤潮的是() ["A、杭州湾","B、莱州湾","C、珠江口","D、辽东湾"]
常规极距电除尘器同极距为250~300mm,一般供电电源电压为()左右。 ["70kV;","50kV;","60kV;","40kV。"]
下列河流有凌汛的是() ["A、密西西比河","B、叶尼塞河","C、尼罗河","D、伏尔加河"]
对开式滑动轴承由哪些部件组成,装配时应注意哪些问题?