若关于x的分式方程xx-3-m=m2x-3无解，则m的值为______．

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。选项中有两项多余选项。（共5小题；每小题2分，共10分）
W: NET Company. Good morning. May I help you?
M: I am making the phone call to complain about the digital camera of your company.
W:  小题1: 
M: The screen always gets black.
W: Could you tell me how long this has been happening?
M:  小题2: 
W: Then is the camera still under guarantee?
M:  小题3: 
W: You can bring it to our repair center to have it checked on first.  小题4: 
M: Then where is your repair center?
W: It’s on the 7th Floor, 1553 Palace Street.  小题5: 

A. It happened about a week ago. B. Yes, I bought it only a month ago. C. What seems to be the problem? D. What can I do for you? E. If there is any problem with the camera itself, you can have it replaced. F. I’m not sure. G. We apologize for causing you inconvenience.