（）是教师职业道德的核心，是教师开展专业活动的基础和前提

A. It is a function used by routing protocols to install routes into routing table
B. It is a function that prevents the advertising of routes over an interface that the router is usingto reach a route
C. Its function is to help avoid routing loops.
D. It is a redistribution technique used by routing protocol

A. 正确
B. 错误

A. 附带认股权证债券与可转换债券的购买者均可获得债券和相应股票的看涨期权
B. 附带认股权证债券与可转换债券的持有人若要执行看涨期权必须放弃债券
C. 可转换债券的底线价值，应当是纯债劵价值和转换价值两者中较低者
D. 附带认股权证债券的权证价值，应当是债券市场价格与纯债券价值的差额