In the Oracle system, sets of SQL statements and control flow statements that have been named, compiled, and stored in the database are referred to as stored（）。

A、 PL/SQL

B、 procedures

C、 triggers

D、 transactions

在五笔字型输入法中，不属于五个基本笔划的是( )。

A．点
B．横
C．竖
D．撇