拆卸轴承时应使用推卸器，没有或不能使用推卸器时，可以使用铜棒平衡敲打。
参考答案：对
若集合A={x|x≤2}、B={x|x≥a}满足A∩B={2}，则实数a=______．
When I met him last week, it was the first time we had seen each other _____ we were at school.[ ]
A. for
B. from
C. since
