[名词解释] 衔接镜头

锅炉烟灰一般不用（）清除。 ["A．手工","B．机械","C．除灰剂","D．蒸汽或压缩空气"] 布莱顿学派 高压炉顶高炉用（）堵铁口。 ["A.有水炮泥","B.无水炮泥","C.耐火炮泥","D.粘土"] 鼓风中含氧增加1%，理论上高炉可提高产量（）。 ["A.1.0%","B.2.1%","C.3.71%","D.4.76%"] B级片 衔接镜头