【参考范文】One day, Spotty returned from his daily walk with a broken leg. Appearing exhausted, he came to myroom and sat near me, the leg bleeding. I called my mother and she quickly tied a bandage around his leg andgave him food to eat. I was very upset. But the next day, Spotty followed me wherever I went happily asusual though he limped a bit. After this incident my relation with Spotty became more intense. I reallyadmired him a lot for his courageAlmost a year later, one midnight we heard Spotty barking breathlessly. We rushed out and saw himbarking continuously, heading somewhere. After some time Spotty became quiet. I patted him on his backand came inside. The next morning, my heart skipped a beat when I didn't see Spotty. I searched for him ineach and every corner but in vain. And this time he had gone and would never come back. I cried and waitedfor him. But there were no signs of him and I only say him looking at me with his sparking eyes in my dream

7.D【解析】过点F作FO⊥平面ABCD,垂足为O,取BC的中点P,连接PF,OP,过点F作FQ⊥AB,垂足为Q,连接OQ.∵△ADE和△BCF都是边长为2的等边三角形,OP1(AB-EF)=1,PF=√3,OQ=1,∴OF=√PF-OP=√2,FQ=√3,∴S根形EFBA=S形ECD=支×(2+4)X3=3√3,又S△BF=S,S矩形ABCD=4×2=8,∴该几何体的表面积为33×2+√3×2+8=8+83.故选D.D

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