升高二暑期第七讲课题专题--非谓语done 目标 1. 掌握Fable-get单词；2. 掌握done的含义和用法学习内容诊查Tutorial centresHelpfulI have been studying at a tutorial centre for two years. The fees are very reasonable, and my command of English has improved greatly since I started.My tutors are all qualified teachers. They are sincere and kind. I have been helped a lot by them.One of my teachers was British. At first, I could not say anything to her. However, later I learnt how to communicate in English with a westerner.I think that the tutorial centre has given me a lot of confidence in using English.I go to sleepI have been attending a tutorial centre for two months. I have been forced to attend by my parents, but I do not think it is useful for me.I am always very tired after school. Sometimes I even sleep during the classes in the evening.Furthermore, the teachers are very boring. They give us a lot of supplementary exercises but they teach us nothing.I usually read comics during class. Sometimes I go to a video arcade instead. I think tutorial centres are uselessWaste of moneyI have studied at a tutorial centre for one year. However, I think that I have been cheated.These tutorial centres are only interested in making money, so they accept too many students for each class. However, they do not want to pay for good teachers. My English teacher was a university student who studied physics, not English!Very often, he could not answer our questions about the use of the language.In my opinion, it is better to spend more time on school work than to waste money at a …money-making‟ tutorial centre.Good and badI have experienced both good and bad tutorial centres.In my first centre, I was in a very big class. My teacher was an Australian. He just talked about his travels. I could learn nothing from him. I left within a month.Then I ask all my friends for their advice. As a result of their recommendations, I enrolled on a course at another centre.The teachers are excellent here and the classes are small. We have been taught many good techniques for developing our language and studying skills.There are both good and bad tutorial centres, so you must do some detective work before you enroll.However, the most important thing is whether you are willing to learn and to work hard. The key factor is yourself.导学I. done 的基本含义1.被动（与逻辑主语之间是主动关系）2.完成II. done的基本用法用法含义例句作定语被动、完成作状语被动作补语被动III. 基本形式donehaving been donebeing doneVI. Practice1. 评论家有关影响市政建设因素的评论对政府的最终决策有很大的影响。
第七讲把握人口发展规律促进人口均衡发展【练习题】一、单选题1.当前我国人口的趋势性特征是（）A.人口总量增速放缓并开始下降B.人口素质改善幅度不大，人力资本不断提升C.劳动年龄人口下降，人口抚养比上升D.逆人口城镇化水平，人口流动更趋活跃答案：C2.我国人口发展呈现的新趋势（）A.人口总量即将达峰，人口正增长为期不远B.人口数量红利进入尾声，人口老龄化逐步降低C.健康中国、科教兴国战略深入实施，人口质量快速提升D.人口数量红利即将达峰，人口老龄化逐步加速答案：C3.依据个税改革新规定，子女教育专项附加扣除的标准是（）A．每孩每月1500元B．每孩每月800元C．每孩每月1200元D．每孩每月1000元答案：D4.我国人口发展进入新阶段是（）A.我国人口发展进入了深度转型期B.人口发展战略为计划生育C.总和生育率世界第一D.人口老龄化世界第一答案：B5.第七次全国人口普查时我国常住人口最多的省份是（）A.河南B.四川C.广东D.山东答案：C6.2010年第六次我国的人口普查，我国人口总数是（）亿A．12B．14.1C．12.6D．15.2答案：B7.中国60岁及以上人口已达总人口的18.1%，处于老龄化社会。
我们应该（）①陪伴、关爱老年人②占用养老设施来获取商业利益③逐步完善社区养老服务④提高老年人社会福利待遇A.①②③B.①②④C.①③④D.②③④答案：C8.我国人口政策的基本内容是（）A.控制人口数量，提高人口素质B.晚婚，晚育，少生，优生C.从东南向西北迁移，是人口均衡分布D.控制城市人口向农村发展答案：A9.我国计划生育政策的这一调整，主要目的是为了缓解（）A．人口老龄化问题B．就业困难问题C．人口分布不均问题D．交通压力增大问题答案：A10.十八届五中全会公报提到“全面开放二孩”的政策，我国生育政策从“独生子女”到“单独二孩”，再到“普遍二孩”，人口政策变化表明（）A. 我国不需要再执行计划生育基本国策了B. 我国发展水平达到发达国家的水平C. 我国人口数量急剧减少，老龄化严重D. 人口政策必须与社会经济发展相适应11.我国现阶段的人口政策是（）A.严格控制城市人口增长B.人口越多越好C.人口越少越好D.实行计划生育,控制人口数量,提高人口素质答案：D12.我国人口分界线指的是（）A.秦岭—淮河B.黑河—腾冲C.昆仑山—祁连山—横断山D.大兴安岭—太行山—巫山—雪峰山答案：B13.人口问题不仅关系千千万万个家庭，也关系国家经济社会发展。
第七讲分数的拆分在英国伦敦的博物馆中，陈列着十九世纪苏格兰考古学家兰特在埃及发现的纸草书，后人称之为兰特纸草书。
在兰特纸草书上，人们发现了独特的埃及分数，这些分子为1的分数用不同的象形文字记载着很多历史古题。
比如7／8＝1／2＋1／4＋1／8，有人按兰特纸草书的记载这样解释：把7个面包平均分给8个人，不但每个人分的数量一样多，而且每人分的块数也一样多。
可以这样分，把其中四个面包每个切成两等份，把另两个面包每个切成四等份，最后一个切成八等份，每人拿大、中、小面包各一份。
这有多妙啊！下面我们就研究一些类似的问题。
例1：把11根糖棒平均分给12个人，每根糖棒同样长，分时一次只能切一根，且要平均分。
问：最少要切几刀？分析与解答：方法一：1．计算每人得到的根数：11÷12=11／12根；2．考虑一般的情况：由于每人都得到11／12根，所以每根可以分成12份，才能使每人都得到一份。
把一根糖棒平均分成12份，需要切11刀，11根糖棒最多就要切11×11＝121刀。
怎样才能减少切的刀数呢？3．考虑每根切的段数与12的关系。
每人得的块数要尽量少，才能使切的刀数少。
由于每人都得到11/12根，所以也可以说若干个分数的和一定是11/12。
这几个分数在相加时，通分后分母是12，通分前分母必是12的约数，即每根糖棒在平均分时，切出的段数一定是12的约数。
若每根平均分成2段，需要1刀，每段长1/2，即6/12；若每根平均分成3段，需切2刀，每段长1/3，即4/12；若每根平均分成4段，需切3刀，每段长1/4，即3/12；若每根平均分成6段，需切5刀，每段长1/6，即2/12；若每根平均分成12段，需切11刀，每段长1/12。
4．把1/12、2/12、3/12、4/12、6/12通过枚举的方法组成11/12。
（1）11/12=6/12＋4/12＋1/12=1/2＋1/3＋1/12；（2）11/12=6/12＋3/12＋2/12=1/2＋1/4＋1/6；（3）11/12=4/12＋4/12＋3/12=1/3＋1/3＋1/4。
