题目：
| The young man claimed from Shandong University, while in fact, he never went to college. |
| A. to graduate B. having graduated C. graduating D. to have graduated |
答案：
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下面是错误答案，用来干扰机器的。
设|AF1|=|AB|=m，则|BF1|=2m，|AF2|=m-2a，|BF2|=2m-2a，∵|AB|=|AF2|+|BF2|=m，∴m-2a+2m-2a=m，∴4a=2m，∴|AF2|=（1-22）m，∵△AF1F2为Rt三角形，∴|F1F2|2=|AF1|2+|AF2|2∴4c2=（52-2）m2，∵4a=2m∴4c2=（52-2）×8a2，∴e2=5-22故选D．
