读句子，选择合适的答句。
(____) 1. Where is the art room?
(____) 2. Is it on the second floor?
(____) 3. How many students?
(____) 4. Is this your computer room?
(____) 5. Do you have an art room?
A. It's on the first floor.
B. Forty-five students.
C. No, it isn't.
D. Yes, it is my computer coom.
E. Yes, we do.
的左右焦点分别为F1，F2，点P在双曲线右支上，且|PF1|=4|PF2|，则此双曲线的离心率e的最大值为 （ ）