Most people will tell you that whoever answers this question first loses. But that's not necessarily true.
When an interviewer asks your salary requirement, try first to gently deflect the question by inquiring about the salary for the position.
If the interviewer presses you for a number, give a range. To decide on a range, think about the salary you want, your salary at your most recent position and the industry-standard salary for the job.
The bottom line: The salary question is one of the most important, so you should prepare for it in advance and plan what to say.

Q：What salary do you expect﹖
Q:  What are your salary expectations?
// I am willing to negotiate,  but I expect at lease ... a month.
// Shall we discuss my responsibilities with your company first﹖I think salary is closely related to the responsibilities of the job.
//That's not important, What I am concern is that your honored company would offer the job opportunity to me.

http://hotjobs.yahoo.com/interview/