高一英语试题 第一部分英语知识运用（共两节，满分45分） 第一节单项选择（共15小题；每小题1分，满分15分） 1. They say that ______ Chinese language is especially difficult for ______ European. A. the, an B. /, the C. the, a D. /, a 2. Seeing the _____ snake, the girl stood under the tree with a _____ look on her face. A. frightened; frightened B. frightened; frightening C. frightening; frightening D. frightening; frightened 3. Tom ______ having broken the glass and made an apology to the teacher. A. permitted B. avoided C. admitted D. noticed 4. My daddy is lovely and ________, but sometimes he is not ______ me. A. energy; patient with B. energetic; patient to C. energetic; patience with D. energetic; patient with 5. The first time you talk to a stranger, you should try to ______ him about the personal affairs. A. keep asking B. keep to ask C. avoid asking D. avoid to ask 6. A letter _____ today will probably reach her the day after tomorrow. A. will be posted B. posted C. to post D. posting 7. –Would you mind if I _____ here? –______. It’s not allowed. A. smoke; Y es, please B. smoked; Y ou’d better not C. smoke; That’s all right D. smoked; Y ou are welcome 8. This is the third time I ______ Beijing. The second time I ______ here was on National Day last year. A. have visited; came B. have visited; have come C. visited; came D. visited; have come 9. _________ you try, _______ you’ll do in the exam. A. Harder, better B. The harder; the better C. The better; the harder D. Better; harder. 10. There are two buildings, ________ stands nearly a hundred feet high. A. the larger one B. the larger of them C. the larger one that D. the larger of which 11. He fell off the bike ______. A. while he were riding B. while riding C. while he is riding D. while on his bike 12. ---What is Li Ming going to be? ---He'll be an English teacher by the time he ____ twenty four. A. is B. will be C. is going to be D. had been 13. A crowd of local children gathered around, _____us in silence. A. eyed B. eyeing C. seeing D looking 14. I hurried _______ I wouldn’t be late for class. A. since B. so that C. as if D. unless 15. Tom kept quiet about the accident______ lose his job. A. so not as to B. so as not to C .so as to not D. not so as to 第二节完形填空（共20小题；每小题1.5分，满分30分） One night, a poor young artist stood at the gate of the subway station, playing his violin. Many people put some money into the 16 of the young man. The next day, the young artist came again, and put his hat on the ground gracefully. 17 from the day
人教版高一英语必修1单词表 Unit 1 1.survey 调查；测验 2.add up 合计 3.upset adj. 心烦意乱的；不安的，不适的 4.ignore不理睬；忽视 5.calm vt.&vi.（使）平静；（使）镇定adj.平静的；镇定的；沉着的calm...down（使）平静下来 6.have got to 不得不；必须 7.concern（使）担心；涉及；关系到n. 担心；关注；（利害）关系 8.be concerned about 关心；挂念 9.walk the dog 溜狗 10.loose adj 松的；松开的 11.vet 兽医 12.go through 经历；经受 13.Amsterdam 阿姆斯特丹（荷兰首都） 14.Netherlands 荷兰（西欧国家） 15.Jewish 犹太人的；犹太族的 16.German 德国的；德国人的；德语的。 17.Nazi 纳粹党人adj. 纳粹党的 18.set down 记下；放下；登记 19.series 连续，系列 a series of 一连串的；一系列；一套 20.outdoors在户外；在野外 21.spellbind 迷住；疑惑 22.on purpose 故意 23.in order to 为了 24.dusk 黄昏傍晚at dusk 在黄昏时刻 25.thunder vi 打雷雷鸣n. 雷，雷声 26.entire adj. 整个的；完全的；全部的 27.entirely adv. 完全地；全然地；整个地 28.power能力；力量；权力。 29.face to face 面对面地 30.curtain 窗帘；门帘；幕布 31.dusty adj 积满灰尘的 32.no longer /not …any longer 不再 33.partner 伙伴．合作者．合伙人 34.settle 安家；定居；停留vt 使定居；安排；解决 35.suffer vt &遭受；忍受经历suffer from 遭受；患病 36.loneliness 孤单寂寞 37.highway公路 38.recover痊愈；恢复 39.get/be tired of 对…厌烦 40.pack捆扎；包装打行李n 小包；包裹pack （sth ）up 将（东西）装箱打包
功放与音箱匹配技巧与注意事项 对功放与音响之间的匹配问题，除了音色软搭配之外（音色搭配常说软硬之分，是根据设计者对音色走向的设计和用料，而具有的特征和个性）还有一些技术指标上的硬搭配。软搭配是经验积累和个人爱好以实际感受为主，硬搭配则以数据和基本技术常识来定夺，下列就来简述硬搭配有关方面的问题。 阻抗匹配 1. 真空管功放（胆机）与音箱匹配时，放大器的输出阻抗应与音箱阻抗相等，否则会出现降低输出功率和增大失真等现象。好在大都胆机都有可变输出阻抗匹配接口如4-8-16欧，与音箱阻抗匹配已趋简单。 2. 对于晶体管功放（石机）与音箱阻抗的匹配 A) 音箱阻抗比功放输出阻抗高时，除了输出功率不同程度的降低外，无其它影响。 B) 音箱阻抗比功放输出阻抗低时，输出功率相应成比例增加，失真度一般不会增加或增加一点点可忽略。但匹配时音箱阻抗不能太低，如低至2奥姆（指2只4奥姆音箱并联时），此时只有功放功率富裕量大，并使用性能良好的大功率管和多管并联推挽，一般对这样的功放无影响。反之，一般普通功放富裕量不大，而功放管的pcm、lcm不大，当音量又开得很大时，这时失真会明显增大，严重时机毁箱亡，切切注意。 功率匹配
1、从原则上来讲，音箱额定功率与功放额定功率不一致时，对于功放来说，它的功率大小只与音箱阻抗有关，而与音箱额定功率无关。无论音箱功率与功放功率是否相同，对功放工作无影响，只是对音箱本身安全有关。 2、如果音箱阻抗符合匹配要求，而承受功率比功放功率小，则推动功率充足，听起来很舒服。这就是常说的功放储备功率要大，才能充分地表现出音乐全部内涵，尤其是音乐中的低频部分，表现更为生动、有力。这是一种较好的匹配。 3、如果音箱的额定阻抗大于功放的额定功率，虽然二者都能安全的工作，但这时功率放大器推动功率显得不够，会觉得响度不足，往往出现已经开到饱和状态，失真加剧，仍感到力不从心。这是一种较差的匹配。 按阻尼系数匹配
高一年级英语笔答试卷 （满分：140分时间：110分钟） 一、选择题（共75 分） 第一部分：听力（共20小题，满分 20 分） 第一节：共5小题 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 1. What is Agatha Christie? A. A writer. B. A bookseller. C. A detective. 2. Why does the man stay at home? A. He doesn’t like playing football. B. He likes staying at home. C. He got hurt. 3. What’s wrong with Li Hua? A. He has got a heada che. B. He has got a backa che C. He has got a tooth ache 4. What will the speakers discuss? A. A report. B. A computer. C. A report on compute r. 5. At what time will the speakers get to Beijing? A. 11:00. B. 12:30. C. 12:45. 第二节 听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中 选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有时间阅读各个小题， 每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。 听第6段材料，回答第6至7题。 6. How much does the green bike cost? A. 116 pounds. B. 163 pounds. C. 283 pounds. 7. Which bike do you think the man will buy? A. The green one. B. The red one. C. Either. 听第7段材料，回答第8至9题. 8. What is Tom’s favorite sport in summer? A. Football. B. Basketball. C. Tennis and swimming. 9. What do you know about Bob? A. He doesn’t like watching football on TV. B. He likes playing football. C. He likes weightlifting 听第8段材料，回答第10至12小题. 10. What are they talking about? A. The students. B. A new job. C. The pay. 11. What does the man ask the woman to do? A. To help get a new B. To help get more mon C. To help make a decis
Unit 1 Friendship 知识点总结： 1.add up 合计，把…加起来 add up to 合计达到… add to 增加，增添 add A to B 把…加进…里面，把…和…相加 eg. Please add these figures up. These figures add up to 900. The bad weather added to our difficulities. Please add some salt to the water. If you add three to four, you get seven. Add three to four and you get seven. Three added to four is seven. add vt. 补充说（后接that从句或者直接引语） Eg. He added that they would return in a week. “And don’t be late,”she added. 词组辨析： 1). The time I spend in commuting every day _________ two and a half hours. 2). Colorful balloons can _____ the festival atmosphere. 3). To make sure the result was correct，she ________ the figures again and again. 高考链接： There have been several new events to the program for 2008 Beijing Olympic Games. A. add B. to add C. adding D. added 2.Your friend comes to school very upset. upset 此处为adj. 做主语补足语，用来补充说明主语的情况。 Eg. He went to bed cold and hungry. She got married young. The room was found empty. ▲ upset的用法： (1). adj. 心烦意乱的，不安的，不适的（多做表语） 搭配：be upset about sth. 为某事烦心be upset that… 心烦 eg. She was really upset about losing the money. I was upset that he had left without saying goodbye. (2). vt. 使不安，使心烦(upset, upset) Eg. Don’t upset yourself about it. The bad news upset the boy’s mother. 3.calm down vt./vi. （使）平静下来，（使）镇定下来 eg. The excited girl quickly calmed down. He took a deep breath to calm himself down. ▲calm adj. 平静的，镇静的，沉着的 eg. Keep calm. After the storm, it became calm again. ▲adj. calm, quiet, still, silent辨析： calm 平静的，沉着的（指无风浪或者人的心情不激动） quiet 安静的，宁静的（指没有声音，不吵闹或者心里没有烦恼，忧虑） still 静止的，不动的（指没有运动或者动作的状态） silent 沉默的，不出声的（指没有声音或者不讲话） 【一言辨异】When facing danger, you should keep calm; when taken photos of, you should keep still; when someone else is asleep, you should keep quiet; in class, you shouldn’t keep silent about the teacher’s questions. 4.have got to 不得不，必须= have to eg. I have got to go to a meeting. Have you got to go now? He hasn’t got to come tomorrow. 【说明】: have got to 很少用于过去时态。 have to 可用于各种时态，而且可与情态动词，助动词连用。 have to 强调客观需要“不得不”; must 强调主观愿望“必须” 5. concern （1）vt. (使)担忧，涉及，关系到 eg. She concerns herself about her son’s future. The news concerns your brother. ▲concern 做动词时，更多情况下用过去分词做表语。搭配： ①be concerned about/for sth. 为… 担心，关心，关注，挂念
浅析功放与音箱匹配技巧与注意事项 6月2日报道对功放与音响之间的匹配问题，除了音色软搭配之外（音色搭配常说软硬之分，是根据设计者对音色走向的设计和用料，而具有的特征和个性）还有一些技术指标上的硬搭配。软搭配是经验积累和个人爱好以实际感受为主，硬搭配则以数据和基本技术常识来定夺，下列就来简述硬搭配有关方面的问题。 一、阻抗匹配 1、电子管功放（胆机）与音箱匹配时，放大器的输出阻抗应与音箱阻抗相等，否则会出现降低输出功率和增大失真等现象。好在大都胆机都有可变输出阻抗匹配接口如4-8-16欧，与音箱阻抗匹配已趋简单。 2、对于晶体管功放（石机）与音箱阻抗的匹配 ①音箱阻抗比功放输出阻抗高时，除了输出功率不同程度的降低外，无其它影响。 ②音箱阻抗比功放输出阻抗低时，输出功率相应成比例增加，失真度一般不会增加或增加一点点可忽略。但匹配时音箱阻抗不能太低，如低至2欧（指2只4欧音箱并联时），此时只有功放功率富裕量大，并使用性能良好的大功率管和多管并联推挽，一般对这样的功放无影响。反之，一般普通功放富裕量不大，而功放管的pcm、lcm不大，当音量又开得很大时，这时失真会明显增大，严重时机毁箱亡，切切注意。 二、功率匹配 1、从原则上来讲，音箱额定功率与功放额定功率不一致时，对于功放来说，它的功率大小只与音箱阻抗有关，而与音箱额定功率无关。无论音箱功率与功放功率是否相同，对功放工作无影响，只是对音箱本身安全有关。 2、如果音箱阻抗符合匹配要求，而承受功率比功放功率小，则推动功率充足，听起来很舒服。这就是常说的功放储备功率要大，才能充分地表现出音乐全部内涵，尤其是音乐中的低频部分，表现更为生动、有力。这是一种较好的匹配。 3、如果音箱的额定阻抗大于功放的额定功率，虽然二者都能安全的工作，但这时功率放大器推动功率显得不够，会觉得响度不足，往往出现已经开到饱和状态，失真加剧，仍感到力不从心。这是一种较差的匹配。 三、按阻尼系数匹配 对于选一对hi-fi音箱来讲，应有最佳的特定的电阻尼要求（负责任的音箱厂家应该提供此数据，指的是对功放阻尼系数的要求。说清楚点就是如要配此音箱，要求所配的功放阻尼系数要达到多少）。一般情况下，功放的阻尼系数高一点为好，低档功放阻尼系数小于10时，音箱的低频特征，输出特征，高次谐波特征等都会变坏。（家用功放的阻尼数一般在几十至几百之间。） 四、线材的匹配。 进口发烧线、神经线林林总总，贵至万余元，次之也要千元至数千元，（当然也有百元以下的），使用效果那是见仁见智的事。好的线材一般情况下都会改善音响器材中某系不足。它的传输理论说起来太复杂，只能简述了。传输线的材料与结构，决定了三个重要参数，即电阻、电容、电感（还有电磁效应、集肤效应、近接效应、电抗等）别看这些参数微小的差距，会直接影响到音响系统频率特征，阻尼特征,信号速率，相位精度，也及音色取向和声场定位等。它的主要作用是，高速传输（尽可能减小信号损失）、抗震动、防杂讯、抗干扰（主要是无线电波rf1射频干扰和em1电磁波干扰等） 音箱功放匹配原则（摘自网络） 功放与音箱配接四要素功放与音箱配接讲究冷暖相宜、软硬适中，以实现整套器材还原音色
成都外国语学校2016-2017学年度上期期末考试 高一英语笔试试卷 第Ｉ卷（选择题共70分） 第一部分阅读理解（共两节，满分40分） 第一节（共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的四个选项（A、B、C和D）中选出最佳选项，并在答题卡上将该项涂黑。 A The strange world of bugs Saturday, April 18, 2 pm Discover the amazing group of shapes, sizes, and behaviors in the insect world, and learn how insects have influence on our lives for better and for worse--from helpful pollinators to annoying bloodsuckers ! Kids can meet live bugs. Sun powered houses Saturday, April 25, 2 pm Find out how the Cornell University Solar team will design, build and operate an energy-efficient, solar-powered house as part of a national competition. Families will learn about the advantages of solar energy and take part in a fun, practical activity. Special school vacation week program Monday, April 13-Friday, April 17, 2 pm Learn how seeds grow into plants. Kids can cut up a seed to find all its parts, make a special book showing the parts of a bean seed, and plant flower and vegetable seeds to take home. This program will be offered at 2 pm every afternoon, Monday--Friday, during school vacation week. Spring into science Saturday, March 21, 2 pm Spring into science with Sciencenter educator John Alvarez del Cas tillo. Find out how
必修1 第一单元Reading 阅读ANNE’S BEST FRIEND Do you want a friend whom you could tell everything to, like your deepest feel ings and thoughts? Or are you afraid that your friend would laugh at you, or would not understand what you are going through? Anne Frank wanted the first kind, so she made her diary her best friend. 安妮最好的朋友 你想不想有一位无话不谈能推心置腹的朋友？或者你会不会担心你的朋友会嘲笑你，会不理解你目前的困境呢？安妮?弗兰克想要的是第一种类型的朋友，所以她把的日记视为自己最好的朋友。 Anne lived in Amsterdam in the Netherlands during World War II. Her family w as Jewish so the had to hide or they would be caught by the German Nazis. She and her family hide away for two years before they were discovered. During that t ime the only true friend was her diary. She said, “I don’t want to set down a serie s of facts in a diary as most people do, but I want this diary itself to be my friend, and I shall call my friend Kitty.” Now read how she felt after being in the hiding p lace since July 1942. 在第二次世界大战期间，安妮住在荷兰的阿姆斯特丹。她一家人都是犹太人，所以他们不得不躲藏起来，否则就会被德国的纳粹分子抓去。她和她的家人躲藏了25个月之后才被发现。在那段时期，她的日记成了她唯一忠实的朋友。她说：“我不愿像大多数人那样在日记中记流水账。我要把我的日记当作自己的朋友，我把我的这个朋友叫做基蒂。”现在，来看看安妮自1942年7月起躲进藏身处后的那种心情吧。 Thursday 15, June, 1944
浅谈音响功放的工作原理 音响中的功放是整个音响设备中的关键部件,所以音响发烧友们都在其上不惜花费人力物力财力进行"摩机",在电源部分,电路的整体布局,用料等方面进行不断改良.本人并不是超级发烧友,充其量算是一位音响爱好者吧,为此在这里我就以一个音响爱好者的身份谈一谈我对音响功放的看法. 功放分胆机与石机,先讨论石机.石机最初的功放为甲类功放,这类功放的功放管的工作点选在管子的线性放大区,所以就算在没有信号输入的情况下,管子也有较大的电流流过,且其负载是一个输出变压器,在信号较强时由于电流大,输出变压器容易出现磁饱和而产生失真,另外为了防止管子进入非线性区,此类放大器往往都加有较深度的负反馈,所以这种功放电路效率低,动态范围小,且频响特性较差.对此人们又推出了一种乙类推挽式功率放大器,这类功放电路其功放管工作在乙类状态,即管子的工作点选在微道通状态,两个放大管分别放大信号的正半周和负半周,然后由输出变压器合成输出.所以流过输出变压器的两组线圈电流方向相反,这就大大地减少了输出变压器的磁饱和现象.另外由于管子工作在乙类状态,这样不仅大大的提高了放大器的效率且也大大的提高了放大器的动态范围,使输出功率大大提高.所以这种功放电路曾流行一时.但人们很快发现,此种功电路由于其功放管工作在乙类工作状态,所以存在小信号交越失真的问题,而且电路需使用两个变压器(一个输出变压器,一个输入变压器),由于变压器是感性负载,所以在整个音频段内,负载特性不均衡,相移失真较严重.为此人们又推出了一种称为OTL的功率放大电路.这种电路的形式其实也是一种推挽电路形式,只不过是去掉了两个变压器,用一个电容器和输出负载进行藕合,这样一来大大的改善了功放的频响特性.晶体管构成的功放电路有了质的飞跃,后来人们又改良了此种电路,推出了OCL和BTL电路,这种电路将输出电容也去掉了,放大器与扬声器采取直接藕合方式,直到现在由晶体管组成的功放电路,其结构基本上是OCL电路或BTL电路.OCL电路与OTL电路不同之处是采取了正负电源供电法,从而能将输出电容取消掉.BTL电路是由两个完全独立的功放模块搭建组成,如图C所示.IC1放大输出的信号一部分通过IC2反相输入端,经IC2反相放大输出,负载(扬声器)则接在两放大器输出之间,这样扬声器就获得由IC1和IC2放大相位相差180度的合成信号了. 不论是OCL或BTL功放电路,由于其去除了输出变压器和输出电容器,使放大器的频响得到展宽。与扬声器配接方面，当功率放大器连接一个标称阻抗低于
深圳外国语学校2015—2016学年度高一第二学期学段（二）考试英语试卷 本试卷分第Ⅰ卷（客观题）和第Ⅱ卷（主观题）两部分。 试卷共11页，卷面满分120分。考试用时120分钟。 注意事项： 1.?答题前，考生务必用黑色字迹的钢笔或签字笔将自己的学校、姓名和准考证号填写 在答题卡上。同时，将条形码贴在答题卡右上角“条形码粘贴处”。 2.?全部答案必须在答题卡上完成，答在本试卷上无效。 3.?选择题每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑；如需改动，用橡皮擦干净后，再选涂其它答案；不能答在试卷上。 4.?非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在另发的答题卷各题目指定区域内的相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案；不准使用铅笔和涂改液。不按以上要求作答的答案无效。 5.?考生必须保持答题卡的整洁。考试结束后，将答题卡交回。? 第Ⅰ卷 第一部分听力（共两节，20小题；每小题1分，满分20分） 第一节：听独白或对话（共15小题；每小题1分，满分15分） 听第1段对话，回答第1～3题。 1. When did she first see them? A. This morning. B. Yesterday. C. Some days ago. 2. What did the man ask the woman to do? A. Describe the item she wanted. B. Check all the kitchenware in stock. C. Have a look at the window display. 3. How might the woman feel in the end? A. Disappointed. B. Excited. C. Surprised. 听第2段对话，回答第4～6题。 4. Why does the man wish to break up with his girlfriend? A. She is not as pretty as she once was. B. They don't get along well. C. He will move soon. 5. What does the woman think of the matter?
必修一 Unit1 Anne’s Best Friend Do you want a friend whom you could tell everything to, like your deepest feelings and thoughts? Or are you afraid that your friend would laugh at you, or would not understand what you are goi ng through? Anne Frank wanted the first kind, so she made her diary her best friend. Anne lived in Amsterdam in the Netherlands during World War Ⅱ. Her family was Jewish so nearl y twenty-five months before they were discovered. During that time the only true friend was her diary. She said, ”I don’t want to set down a series of facts in a diary as most people do, but I want this diary itself to be my friend, and I shall call my friend Kitty.” Now read how she felt after being in the hiding place si nce July 1942. Thursday 15th June, 1944 Dear Kitty, I wonder if i t’s because I haven’t been able to be outdoors for so long that I’ve grown so crazy ab out everything to do with nature. I can well remember that there was a time when a deep blue sk y, the song of the birds, moonlight and flowers could never have kept me spellbound. That’s chan ged since I was here. … For example, one evening when it was so warm, I stayed awake on purpose until half past eleven in order to have a good look at the moon by my self. But as the moon gave far too much light, I di dn’t dare open a window. Another time five months ago, I happened to be upstairs at dusk when the window was open. I didn’t go downstairs until the window bad to be shut. The dark, rainy eve ning, the wind, the thundering clouds held me entirely in their power; it was the first time in a ye ar and a half that I’d seen the night face to face… … Sadly …I am only able to look at nature through dirty curtains hanging before very dusty windows . It’s no pleasure looking through these any longer because nature is one thing that really must be experienced. Yours, Anne 第一单元友谊Reading 安妮最好的朋友 你是不是想有一位无话不谈能推心置腹的朋友呢？或者你是不是担心你的朋友会嘲笑你，会不理解你目前的困境呢？安妮·弗兰克想要的是第一种类型的朋友，于是她就把日记当成了她最好的朋友。安妮在第二次世界大战期间住在荷兰的阿姆斯特丹。她一家人都是犹太人，所以他们不得不躲藏起来，否则他们就会被德国纳粹抓去。她和她的家人躲藏了两年之后才被发现。在这段时间里，她唯一的忠实朋友就是她的日记了。她说，“我不愿像大多数人那样在日记中记流水账。我要把这本日记当作我的朋友，我要把我这个朋友称作基蒂”。安妮自从1942年7月起就躲藏在那儿了，现在，来看看她的心情吧。亲爱的基蒂： 我不知道这是不是因为我长久无法出门的缘故，我变得对一切与大自然有关的事物都无比狂热。我记得非常清楚，以前，湛蓝的天空、鸟儿的歌唱、月光和鲜花，从未令我心迷神往过。自从我来到这里，这一切都变了。 ……比方说，有天晚上天气很暖和，我熬到11点半故意不睡觉，为的是独自好好看看月亮。但是因为月光太亮了，我不敢打开窗户。还有一次，就在五个月以前的一个晚上，我碰巧在
人教版版高中英语电子课本(必修)
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必修1 第一单元Reading 阅读ANNE’S BEST FRIEND Do you want a friend whom you could tell everything to, like your deepest feelings and thought s? Or are you afraid that your friend would laugh at you, or would not understand what you are goi ng through? Anne Frank wanted the first kind, so she made her diary her best friend. 安妮最好的朋友 你想不想有一位无话不谈能推心置腹的朋友？或者你会不会担心你的朋友会嘲笑你，会不理解你目前的困境呢？安妮?弗兰克想要的是第一种类型的朋友，所以她把的日记视为自己最好的朋友。 Anne lived in Amsterdam in the Netherlands during World War II. Her family was Jewish so the had to hide or they would be caught by the German Nazis. She and her family hide away for two years before they were d iscovered. During that time the only true friend was her diary. She said, “I don’t want to set down a series of facts in a diary as most people do, but I want this diary itself t o be my friend, and I shall call my friend Kitty.” Now read how she felt after being in the hiding pla ce since July 1942. 在第二次世界大战期间，安妮住在荷兰的阿姆斯特丹。她一家人都是犹太人，所以他们不得不躲藏起来，否则就会被德国的纳粹分子抓去。她和她的家人躲藏了25个月之后才被发现。在那段时期，她的日记成了她唯一忠实的朋友。她说：“我不愿像大多数人那样在日记中记流水账。我要把我的日记当作自己的朋友，我把我的这个朋友叫做基蒂。”现在，来看看安妮自1942年7月起躲进藏身处后的那种心情吧。 Thursday 15, June, 1944 Dear kitty, I wonder if it’s because I haven’t been able to be outdoors for so long that I’ve grown so crazy about everything to do with nature. I can well remember that there was a time when a deep blue
功放和音箱的接线方法 1、功放分定压式与定阻式： 定压功放一般用于公共场合的公共广播，其特点为单声道输出、高电压低电流输出。 定阻功放多用于专业场合，其特点为立体声输出、低电压高电流输出。 2、我们的功放都是定阻式，下面主要讲定阻功放与音箱。 定阻即是指负载的阻抗要与功放输出阻抗相匹配，所以只要你系统中连接的音箱总电阻与功放一致就行了，不管你的音箱串联、并联或者混联都行。 关于串联和并联的电阻计算公式在初中就学了： 串联时：R=R1+R2 并联时：R=1/(1/R1+1/R2) 比如说， 有2只16Ω的音箱，用我们的CS功放（4Ω/8Ω）去推，可以将音箱并联得到8Ω； 有1台16Ω的功放，要推我们的2只E-8（8Ω），可以将音箱串联得到16Ω； 有1台16Ω功放，要推4只16Ω的音箱，可以将其中两只并联，再将另外两只并联，最后把两组音箱串联得到16Ω； 在我们常用的方案里，1台CS2000功放推4只E-8音箱，就是把E-8两两并联，音箱阻抗变为4Ω，功放自适应为4Ω，功率也相应加大了。 本帖最后由SVSZ 于2011-7-22 16:33 编辑
1、先常规解释功放桥接的定义： 桥接模式(bridge mode)是利用功放内部的两个放大电路相互推挽，从而产生更大输出电压的方式，功放设定为桥接模式后，成为一台单声道放大器，只可以接受一路输入信号进行放大，输出端为两路功放输出的正端之间。 桥接的定义说得很清楚了，设置成桥接模式往往是因为功放的功率不够，而桥接模式下功放的输出功率一般为普通模式下的2-3倍。但是在桥接模式下功放只是单声道输出（推一只音箱，比如常用来推一只低音炮）。 2、桥接方法： 将功放的模式开关调至Bridge，然后把音箱线的正极接到功放左声道的正极，音箱线的负极接到功放右声道的正极，咱们SVS各款功放的桥接开关和接线方法详见下图： （CS系列功放桥接开关，按下状态为桥接模式，弹出状态为立体声模式） （H系列功放桥接开关，从上到下依次为立体声、单声道、桥接模式）
