一轴类零件,在车、磨、铣键槽等多个工序中,始终以两端中心孔作为基准,这种基准使用方法称为()。
A.基准重合原则
B.基准统一原则
C.互为基准原则
D.基准先行原则
参考答案:B
She felt ___ Henry were a member of her own family.
A.so long as
B.as soon as
C.as
D.as if
上胸节的脊髓节段平面为()。
A.椎骨数加1
B.椎骨数加2
C.椎骨数加3
D.T10~T12
E.T12~L1