You're welcome, VpUser,
1. May i know what different between CONTAINS and FREETEXT?
A. CONTAINS and CONTAINSTABLE will return rows that contain the exact word
that you are searching for while FREETEXT or FREETEXTTABLE will return the
exact word and if present, words that "match the meaning and not the exact
wording of the words in the search condition" (from SQL 2000 BOL). So while
in the small table pub_info, the results would be the same for your search
word booktitle, while in larger tables with more diverse text, FREETEXT
would often return more rows than CONTAINS when searching for the same word.

2. The correct sntax for the table pub_info than does not have a column
called "title", would be:
select * from pub_info where CONTAINS(*,'book and title')

When I execute the above query on Win2003, it returns 0 rows and no errors.
However, if I change title in the search condition, to "between" a
US_English noise word:

select * from pub_info where CONTAINS(*,'book and between')

This returns error  Msg 7619 ".. A clause of the query contained only
ignored words". This can be avoided by removing "between" from the
US_English noise word file noise.enu that is located under
\FTDATA\SQLServer\Config where you have SQL Server 2000 installed. You can
open and edit this file with notepad.exe, but to save it you will need to
stop the "Microsoft Search" service and then run a Full Population.
Additionally, you can alter the query using quotes or parse the noise word
out via pre-processing before passing it to a SQL Server contains query. I'd
recommend that you review SQL Server 2000 BOL title "Full-text Search
Recommendations" as well as KB article 246800 (Q246800) "INF: Correctly
Parsing Quotation Marks in FTS Queries" at:
http://support.microsoft.com//default.aspx?scid=kb;EN-US;246800

3. May i enter noisy word in the search? how do i know the noisy word by
using SQL statement(not from text file).
A. Yes, but you will need to parse the noise word into phrases or remove it
to avoid the error. You can also use BULK INSERT and import the noise word
file (noise.enu text file) into a SQL table and then use that table as a
lookup table to determine if the searcher enters a noise word.

Regards,
John