2022教育周报 英语 5年级 14期答案

12C【解析】因为OA(OB OF1),所以A为BF的中点由题意可设F1(-c,0),得直线AB的方程为y=3(x c),当x=0时,y=√3,所以A(0,3c)设B(x,y),则2×0=x-c,23c=y 0,得x=c,y23c,所以B(c,2√3c),所以12c21=,得b4=12a2c2,即(c2-a2)2=12a2c2,整理可得e-14e2 1=0,即e2=7 43=(2 3)2,解得c=2 √3故选C

写作Dear denny,m lia reporter from our school English newspaper. I' m writing to ask whether youcan meet me for an interview at three this friday afternoon in your office.【高分句型一】(点明书倍目的-采访时间和地点mproving reading ability is very important to us students.【高分句型二】 Some of us havegreat trouble reading english materials, especially famous original works. you know a goodpart of our exam consists of reading and this is where we easily lose marks. We need someadvice on how to improve our reading ability. I'd appreciate it if you could spare some timeand give us some advice.(采访内容)ooking forward to your early reply..(期盼回复Yoursua

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