通过 SQL，在表 Actor 中选择 FirstName 等于 Jim 而 LastName 等于 Carter 的所有记录的表述正确的是（）。

A.SELECT * FROM Actor WHERE LastName BETWEEN 'Adams' AND 'Carter'

B.SELECT * FROM Actor WHERE LastName>'Adams' AND LastName<'Carter'

C.SELECT LastName>'Adams' AND LastName<'Carter' FROM Actor

D.SELECT * FROM Actor WHERE LastName>'Adams' OR LastName<'Carter'

A.SELECT * FROM Actor WHERE FirstName LIKE 'a%'

B.SELECT * FROM Actor WHERE FirstName='a'

C.SELECT * FROM Actor WHERE FirstName LIKE '%a'

D.SELECT * FROM Actor WHERE FirstName='%a%'

A.SELECT * FROM Actor SORT 'FirstName' DESC

B.SELECT * FROM Actor ORDER BY FirstName DESC

C.SELECT * FROM Actor ORDER FirstName DESC

D.SELECT * FROM Actor SORT BY 'FirstName' DESC

A.select actor.FirstName

B.extract FirstName from actor

C.select FirstName from actor

D.update FirstName from actor

A.SELECT COLUMNS() FROM Actor

B.SELECT COLUMNS(*) FROM Actor

C.SELECT COUNT() FROM Actor

D.SELECT COUNT(*) FROM Actor

A.INSERT ('Jimmy', 'Jackson') INTO Actor

B.INSERT VALUES ('Jimmy', 'Jackson') INTO Actor

C.INSERT INTO Actor VALUES ('Jimmy', 'Jackson')

D.INSERT INTO Actor VALUE ('Jimmy', 'Jackson')

A.如果MAC表中找到目的地址等于D的转发项，且转发端口是y，通过端口y输出该MAC帧。

B.如果MAC表中找不到目的地址等于D的转发项，通过除端口x以外的所有其他端口输出该MAC帧。

C.如果MAC表中找到目的地址等于D的转发项，且转发端口是x，丢弃该MAC帧。

D.如果MAC表中找不到目的地址等于D的转发项，丢弃该MAC帧