第二节书面表达【写作思路】根据试题要求,考生需要写一篇记叙文,记述身边一位值得尊敬和爱戴的人。首先考生需要介绍自己最尊敬和爱戴的人是谁,简单地介绍一下他(她)。然后,陈述为什么他(她)值得尊敬和爱戴。最后,可以对前文进行一个总结,使文章结构严谨。本文的写作重点在"尊敬和爱戴的原因",考生可围绕这个要点适当拓展,从性格特点、处事风格等方面展开写作。【范文赏读】The most beloved and respected person around me is my teacher, Ms LiThough she has been teaching English for twenty years, she is still passionateabout teaching. She is kind and considerate towards us just like our dear motherWe all respect her because she always tries new ways to make her classes livelyand interesting. Hardworking and knowledgeable, she is one of the best teachersin our school. When we have a problem, we will turn to her for help. She alwaystalks to us patiently and helps us to find a solution. In our eyes, she is not onlyour teacher, but also our best friend. Those are why she deserves our respect【亮点词句】亮点词汇: beloved, respected, be passionate about, be consideratetowards, turn to sb. for help, in one's eyes亮点句式:Why引导的表语从句( why she deserves our respect)

12.C【解析】如图所示,取AC的中点O,连接PO,OB,由OP⊥AC,OB⊥AC知∠POB为二面角P-AC-B的平面角,故cos∠POB=y6在平面PBO内过点P作BO的垂线交BO的延长线于点D,cos∠POD3OP⊥AC,OB⊥AC得AC⊥平面PBO,所以AC⊥PD,得PD⊥平面ABC,OP=√AP2-OA2=√5-2=√3,所以OD=PCos∠POD=3×6=2,DP=√OP-OD=1,所以OA=OC=OD=OB=√,则四边形ABCD为正方形,从而易联想到将此三棱锥补形成长方体ABCD-EFGP.所以三棱锥P-ABC的外接球即为长方体ABCD-PEFG的外接球,且PB为该外接球的一条直径,又PB=√AD2+CD2+PD2=3,现该外接球的半径R=2,所以该三棱锥的外接球的表面积为S=4R2=4x×=9故选CFP5“---r----------==BD

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