The speaker, Professor Davie, __________ for his impressive achievements in physics, was warmly received by all the students in our school.

A．being known

B．known

C．having known

D．to know

接受风险包括风险自担和风险自保两种。风险自担，是指企业预留一笔风险金或随着生产经营的进行，有计划地计提资产减值准备等。风险自保，是指损失发生时，直接将损失摊入成本费用，或冲减利润。 ( )