PRIVATE ENGLISH LESSONS

    An experienced teacher is offering private lessons in English．

Please email me at the address below and tell me．

    ·Your age

    ·Reasons for learning English

    ·Your level of English

    ·Areas that you need to focus on--grammar，listening，speaking，reading，writing，etc．

     Mrs Daniels(daniels@mail．corn)

Dear Mrs Daniels，

         I recently saw your advertisement on the university website offering private English lessons．I'm very interested in your private lessons and would like some more information．I am a student at Aston College here in Hong Kong studying English，so my language level is already quite good．

     However，I feel that I need to improve my listening and speaking skills．This is because I'm planning to study at London University in England next year and I think your lessons will help me to live and study abroad．

     Could you send me some more information about the lessons offered，such as where and when they will be held and how much they cost? Also，I would like to know whether you teach students in groups or one-on-one．

     I would be glad to supply any further information you might need．

                                                                                                                                 Regards，

                                                                                                                                                                 Li Hua

黄铜是常见的合金．为了测定某黄铜（成分为铜和锌）中锌的质量分数，某化学兴趣小组的同学进行了以下实验：取100g黄铜的样品，粉碎后加入装有245g足量稀硫酸的烧杯中，反应过程中测得烧杯内所盛物质的质量与相应时间记录如图：

请回答下列问题并计算：

已知直线a和两个平面$\alpha ,\beta$，给出下列两个命题：
命题p：若a∥$\alpha$,a⊥$\beta$，则$\alpha$⊥$\beta$；
命题q：若a∥$\alpha$, a∥$\beta$,则$\alpha$∥$\beta$。
那么下列判断正确的是（   ）

                                                                                                             李密传
      李密，字令伯，犍为武阳人也，一名虔。父早亡，母何氏改醮^①。密时年数岁，烝烝^②之性，遂以成疾。祖母刘氏，躬自抚养。密奉事以孝谨闻，刘氏有疾，则涕泣侧息，未尝解衣，饮膳汤药必先尝后进。
      少仕蜀，为郎。数使吴，有才辩，吴人称之。蜀平，泰始初，诏征为太子洗马。密以祖母年高，无人奉养，遂不应命。帝闻之曰：“士之有名，不虚然哉！”乃停召。
      后刘终，服阕，复以洗马征至洛。司空张华问之曰：“安乐公何如？”密曰:“可次齐桓。”华问其故，对曰：“齐桓得管仲而霸，用竖刁而虫流。安乐公得诸葛亮而抗魏，任黄皓而丧国，是知成败一也。”次问:“孔明言教何碎？”密曰:“昔舜、禹、皋陶相与语，故得简雅；《大诰》与凡人言，宜碎。孔明与言者无己敌，言教是以碎耳。”华善之。
      出为温令，而憎疾从事，尝与人书曰：“庆父不死，,鲁难未已。”从事白其书司隶，司隶以密在县清慎，弗之劾也。密有才能，常望内转，而朝廷无援，乃迁汉中太守，自以失分怀怨。及赐饯东堂，诏密令赋诗，末章曰：“人亦有言，有因有缘。官无中人，不如归田。明明^③在上，斯语岂然！”武帝忿之，于是都官从事奏免密官。后卒于家。
                                                                                                                                                                           （有删改）
     【注】：①醮：改嫁。  ②烝烝：热切的样子，形容李密对母亲思念之深。  ③明明，这里指圣明的皇帝。