Aboriginal （土著居民）is a term ______ to describe the people living in a place from the earliest _______ times or before European arrived .

A．used ; knowing

B．used ; known

C．using ; known

D．using ; knowing

商业银行在需要时可以向中央银行申请借款，商业银行向中央银行借款的途径为( )。

A．仅再贴现一种

B．仅再贷款一种

C．仅同业拆借一种

D．再贴现和再贷款两种