何谓基孔制？
参考答案：
基孔制是指基本偏差为一定孔的公差带，与不同基本偏差的轴的公差带形成的各种配合的一种制度。基孔制中为基准孔，其下偏差为零。
昏迷病人的搬运要点？
—Remember how we met the first time, Dick?
—Of course I do. You _________ to the teachers’ office hurriedly and _________ me.
A．were walking; didn’t notice
B．had walked; weren’t noticing me
C．had been walking; noticed
D．walked; had noticed
