转炉炉体构件包括炉壳、（）耳轴和轴承座等金属结构及（）。
参考答案：托圈；转炉倾动机构
启动挤压机、膨胀机润滑油泵前应检查什么内容？
I called you, but nobody answered. Where ________ you? [ ]
A. is
B. are
C. was
D. were
