2023英语周报七上7期答案

2023英语周报七上7期答案已经整理完毕，供同学们学习参考，更多英语周报答案，请关注本站。

3【解析】当点P到平面ABC的距离最大时.PA⊥平面ABC.如图.以△ABC为底面,PA为侧棱补成个直三棱柱,则球O是该三棱柱的外接球,球心O到底面△ABC的距离=1PA=1由正弦定理得AB△ABC的外接圆半径r所以球O的半径R=√a2+r2所以球O的表面积为S4RA

局二一轮复习·新咼考第二节One possible versionDear Sir/madamI' m writing to complain about a Kindle that I pur-chased from your website on May i stAfter one week of its purchase, I found it didnt workas expected. The battery didn't last long after beingrecharged, perhaps merely half a day. Worse than that, thewords on the screen were not distinct enough, which i thinkis damaging to my eyesighthave been a devoted customer of your company and: Ihope you will look into the matter seriously and replace thefaulty Kindle with a new one as guaranteed. Thank youYours sincerelyLi Hua

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