There is no perfect person, some people have made _____success of themselves in spite of what would appear to be ______ weakness in their professions.

A．/, a

B．a, /

C．a, a

D．/, /

轧制分纵轧和横轧，纵轧即是沿着轧件长度方向轧，而横轧即沿着轧件的横向轧制，在中厚板轧制时，经常用横轧。