insert、update、delete等操作的Sql语句主要用ExecuteNonQuery()方法来执行。（ ）

A．28-32周
B．20-24周
C．35-40周
D．产前

A．By supplying all necessary information at the very beginning of the story.
B．By omitting a piece of detail at the first paragraph, and not lifting the veil until later.
C．By being intentionally obscure and writing the lead as a puzzle.
D．None of the above.