band 2

合集下载

蓝牙2协议

蓝牙2协议

蓝牙2协议
蓝牙2.0是蓝牙技术的一个重要版本,它在蓝牙1.2的基础上进行了一系列的
改进和优化,为用户提供了更加稳定、高效的无线通信体验。

蓝牙2.0协议在数据
传输速率、安全性、功耗等方面都有所提升,使得蓝牙技术在各种应用场景下得到了更广泛的应用。

首先,蓝牙2.0在数据传输速率方面进行了显著的提升。

相比于蓝牙1.2的
3Mbps的数据传输速率,蓝牙2.0将数据传输速率提升到了3Mbps的高速传输模式和24Mbps的增强数据速率模式。

这使得蓝牙2.0可以更快地传输大容量的数据,
例如音频、视频等,满足了用户对于高速数据传输的需求。

其次,蓝牙2.0在安全性方面进行了改进。

引入了更加安全的加密算法,提高
了数据传输的安全性,防止了数据被非法窃取或篡改的风险。

同时,蓝牙2.0还引
入了自动重新连接功能,当设备之间的连接意外中断时,可以自动重新建立连接,提高了通信的稳定性和可靠性。

此外,蓝牙2.0还在功耗方面进行了优化。

引入了高效的低功耗模式,延长了
设备的电池续航时间,使得蓝牙设备可以更加持久地工作,减少了用户的充电频率,提高了使用的便利性。

总的来说,蓝牙2.0协议在数据传输速率、安全性、功耗等方面都进行了重要
的改进和优化,为用户提供了更加稳定、高效的无线通信体验。

随着蓝牙技术的不断发展,相信蓝牙在未来会有更广阔的应用前景,为人们的生活带来更多的便利和乐趣。

小米手环2使用技巧

小米手环2使用技巧

小米手环2使用技巧小米手环2是一款功能强大、性价比高的智能手环。

它集合了多项实用功能,能够帮助用户更好地管理自己的健康和生活。

接下来,我将为大家介绍一些小米手环2的使用技巧。

首先,小米手环2具备智能心率监测的功能。

用户只需要将手环佩戴在手腕上,并打开心率监测功能,就可以实时监测自己的心率。

这对于日常健康管理非常有用。

在进行运动时,心率的变化能够帮助用户更好地控制运动强度,避免过度劳累。

此外,在休息时,心率的监测也能够帮助用户判断自己的身体状况。

其次,小米手环2具备多种运动模式的识别功能。

它能够自动识别用户的运动类型,例如步行、跑步、骑行等。

用户只需选择相应的运动模式,就能记录运动过程中的步数、距离、消耗的卡路里等相关信息。

同时,手环还会根据用户的运动情况提醒用户适当休息,避免运动过度。

这对于爱好运动的用户来说,非常有帮助。

另外,小米手环2还具备睡眠监测的功能。

用户只需将手环佩戴在手腕上并打开睡眠监测功能,就能记录自己的睡眠时间和质量。

手环会根据用户的睡眠情况,给出相应的睡眠建议,帮助用户改善睡眠质量。

此外,手环还可以设定起床闹钟,根据用户的睡眠周期,选择合适的时间进行提醒。

让用户能够在舒适的状态下醒来。

小米手环2还支持消息提醒和来电提醒的功能。

用户只需将手环绑定到手机上,就能在手环上收到来自手机的短信、微信等各种消息提醒。

而且,当手机有来电或短信时,手环还能通过振动提醒用户。

这个功能不仅方便用户随时查看手机上的消息,而且在不方便拿出手机时,也能及时获得重要的消息。

最后,小米手环2还能记录用户每日的运动步数,并提供给用户相应的运动建议。

用户只需将手环佩戴在手腕上,手环会自动记录每天的运动数据。

通过手机App,用户还能查看每天的运动记录和趋势,帮助用户更好地了解自己的运动情况,并制定合理的运动计划。

总之,小米手环2集合了多项实用功能,给用户带来了很大的便捷和帮助。

用户只需简单的设置和操作,就能充分利用手环的各项功能。

VDA_Band_2_2004_en

VDA_Band_2_2004_en
The third edition in 1998 was adjusted to and aligned with the international quality management standards in the automotive industry. In addition, the volume was streamlined and contents that have already been presented in detail in other VDA volumes were no longer included.
4. Edition 2004
Quality Assurance of Supplies
Supplier selection Quality assurance agreements Production process and product approval Quality performance in series production Declaration of constituents
In this edition, new descriptions have been provided of major sections of the manufacturing process and product approval procedures (first sample testing). An additional chapter provides information on the declaration of constituents and materials. All of the chapters were revised. The aim is to promote and advance the utilization of process oriented quality management systems. Additional suggestions and feedback from the automotive industry have been included.

GSM1900和WCDMA BAND2 共RX接收通路,接收灵敏度存在1.5 dB差异

GSM1900和WCDMA BAND2 共RX接收通路,接收灵敏度存在1.5 dB差异

Q. 最近遇到案子,GSM1900和WCDMA BAND2 共RX接收通路,接收灵敏度存在1.5dB的差异,怎么解释?W BAND2 灵敏度能达到-109,-109.5,-109;可是GSM只能到-107.5,-108,-107.5,这个是怎么解释的?先说结论无De-sense现象这是正常现象假设Block Diagram如下:灵敏度公式:Sen(dBm)=-174+10log(BW)+ Loss_FE+NF_WTR+SNRminNF_WTR是Transceiver的NF 以WTR3925为例其NF为2.3 dB Loss_FE是天线头到Transceiver的射频前端(Front-End)的Loss总和既然PCS 1900跟WCDMA B2共路那表示Loss_FE是一样的(由图可看出即便PCS1900是TDD 一样会经过双工器)你W BAND2(BW = 3.84 MHz)灵敏度能达到-109.5 那就来反推其Loss_FE 反推如下:-109.5 = -174 +10log(3.84 MHz) + 2.3 + Loss_FE + (-9.5)反推出来其Loss_FE 约为6 dB再来计算PCS1900(BW = 200 KHz)理论上的灵敏度Sen(dBm) = -174 + 10log(200 KHz)+2.3+6+4.75=-108跟你量出来的差不多啊最好也就-108了所以理论上无De-sense现象由灵敏度公式可知WCDMA B2跟PCS 1900差别在于10log(BW)跟SNRminWCDMA : 10log(3.84 MHz) = 65.84SNRmin = -9.5所以65.84+(-9.5) = 56.34PCS : 10log(200 KHz) = 53SNRmin = 4.75所以53+4.75 = 57.75计算10log(BW)跟SNRmin相加结果WCDMA大概少了1.5 dB 所以灵敏度当然会比PCS好1.5 dBWCDMA虽然带宽较宽理论上灵敏度要较差但它是展频通讯解调后有25 dB的Process Gain所以SNRmin可以是负的这样一算当然灵敏度较低3GPP也知道这点所以灵敏度规范普遍比GSM的-102 dBm严格以WCDMA B2为例其Spec为-104 dBm再谈De-sense 如果GSM有De-sense 但WCDMA无那多半是外来Noise 例如高速数字讯号或是Clock讯号因为GSM带宽较窄容易受干扰WCDMA带宽较宽较不易受干扰但若这种状况多半是某几根Channel受干扰且受干扰的Channel间隔会有规律性例如19.2 MHz 那就是受晶振谐波干扰不太会是全面性所有Channel都受干扰若是全面性所有Channel都受干扰那一般比较有可能是电源问题但倘若是电源问题理论上PCS1900跟WCDMA B2都会受干扰因为同一路不太可能GSM有事WCDMA没事所以同时由这样分析也得知单单只有PCS1900灵敏度差但WCDMA B2灵敏度很好的现象不太会是De-sense造成至于你会说以前2G的灵敏度都可以到-108, -109怎么这个平台这么烂?那是因为现在的平台频率相近都会做同一路以该Case为例WCDMA B2跟PCS 1900就作同一路WCDMA是FDD 会需要双工器既然WCDMA B2跟PCS 1900同一路那么PCS 1900路径上也会有双工器其Loss会使灵敏度变差而早期平台例如RTR6285A其WCDMA B2跟PCS 1900是分开不同路的而PCS 1900是TDD 本来就不需要双工器少了双工器的Loss 其灵敏度当然较佳。

Landsat陆地卫星系列遥感数据介绍

Landsat陆地卫星系列遥感数据介绍

Landsat陆地卫星遥感影像数据1.美国陆地卫星计划“地球资源技术卫星”计划最早始于1967年,美国国家航空与航天局(NASA)受早期气象卫星和载人宇宙飞船所提供的地球资源观测的鼓舞,开始在理论上进行地球资源技术卫星系列的可行性研究。

美国陆地卫星(Landsat)系列卫星由美国航空航天局(NASA)和美国地质调查局(USGS)共同管理。

陆地卫星是美国用于探测地球资源与环境的系列地球观测卫星系统,曾称作地球资源技术卫星(ERTS)。

陆地卫星的主要任务是调查地下矿藏、海洋资源和地下水资源,监视和协助管理农、林、畜牧业和水利资源的合理使用,预报农作物的收成,研究自然植物的生长和地貌,考察和预报各种严重的自然灾害(如地震)和环境污染,拍摄各种目标的图像,以及绘制各种专题图(如地质图、地貌图、水文图)等。

1972年7月23日,第一颗陆地卫星(Landsat1)成功发射,后来发射的这一系列卫星都带有陆地卫星(Landsat)的名称。

到1999年4月15日,共成功发射了六颗陆地卫星,它们分别命名为陆地卫星1到陆地卫星5(Landsat1—landsat5)以及陆地卫星7(Landsat7),其中陆地卫星6的发射失败了。

时隔24年,2013年2月11日Landsat 系列卫星Landsat8发射升空,经过100天的测试运行后开始获取影像。

2.陆地卫星的轨道参数陆地卫星的轨道设计为与太阳同步的近极地圆形轨道,以确保北半球中纬度地区获得中等太阳高度角(25°一30°)的上午成像,而且卫星以同一地方时、同一方向通过同一地点.保证遥感观测条件的基本一致,利于图像的对比。

如Landsat 4、5轨道高度705km.轨道倾角98.2°,卫星由北向南运行,地球自西向东旋转,卫星每天绕地球14.5圈,每天在赤道西移159km,每16天重复覆盖一次,穿过赤道的地方时为9点45分,覆盖地球范围N81°—S81.5°。

Landsat数据介绍

Landsat数据介绍

Landsat数据介绍LANDSAT是美国NASA的陆地卫星计划(1975年前称“地球资源技术卫星-ERTS”),从1972年开始发射第一颗卫星LANDSAT-1,已发射7颗。

目前,在役服务的是Landsat5。

Landsat5搭载MSS(Multi Spectral Scanner)四波段光-机扫描仪和TM(Thematic Mapper)多光谱扫描仪。

在2003年出现故障的Landsat7于1999年发射,搭载Enhanced Thematic Mapper Plus(ETM+)多光谱扫描仪,ETM+除有TM 7个波段外,增加了一个全色波段,空间分辨率为15米,同时热红外波段空间分辨率也提高到了60m。

Landsat系列卫星参数一览表陆地卫星的MSS、TM在波段的选择上,均考虑到在各自的条件下最大限度地区分和监测不同类型的地球资源。

MSS选用可见光-近红外(0.5~1.1μm)谱段,共分4个波段。

TM选用可见光-热红外(0.45~0.55μm)谱段,共分7个波段。

Landsat各个传感器波段设计1.MSS2.MSS3.TM4.ETM+数据解压后将得到7(TM)个波段文件,1个控制点文件(GCP.txt),1个头文件(MTL.txt). 定标,打包都可以通过头文件来完成。

landsat8表1:OLI陆地成像仪OLIOLI陆地成像仪ETM+序号波段(μm)空间分辨率(m)序号波段(μm)空间分辨率(m)1 0.433–0.453 302 0.450–0.515 30 1 0.450–0.515 303 0.525–0.600 30 2 0.525–0.605 304 0.630–0.680 30 3 0.630–0.690 305 0.845–0.885 30 4 0.775–0.900 306 1.560–1.660 30 5 1.550–1.750 30常用的合成方法:321:真彩合成。

与肉眼所见接近;仅使用反射的可见光,受大气、云雾、阴影、散射的影响较大,通常对比度不高,感觉模糊(蓝色光散射严重);对于海岸区域研究特别有用,因为可见光可穿透水面,观察到海底。

华为banda2使用技巧

华为banda2使用技巧

华为banda2使用技巧华为Band 2是一款功能强大的智能手环,它不仅具备传统的计步、心率监测等基本功能,还拥有睡眠监测、运动记录等更加智能化的特色功能。

今天,我将为大家介绍一些华为Band 2的使用技巧,帮助大家更好地使用这款智能手环。

首先,华为Band 2的心率监测功能非常重要。

要使用这个功能,您只需要将手环佩戴在腕部,并打开手环上的心率监测开关。

然后,您可以打开华为Health应用,在“心率”选项中查看您的心率数据。

此外,您还可以在手环上设置“心率警报”,当您的心率超过或低于设定的阈值时,手环会自动发出警报。

其次,华为Band 2还具备睡眠监测功能。

这个功能可以帮助您了解自己的睡眠质量。

要使用这个功能,您需要在睡觉前将手环佩戴在腕部,并通过华为Health应用设置手环进入睡眠监测模式。

第二天早上醒来后,您可以在应用中查看您的睡眠数据,包括深睡眠、浅睡眠和清醒时长等信息。

如果您发现自己的睡眠质量不佳,可以根据手环提供的建议调整作息时间和环境,改善睡眠质量。

在使用华为Band 2进行运动时,您可以通过手环上的“运动”选项记录您的运动数据。

手环可以自动识别您的运动类型,并为您记录相关的运动数据,如步数、卡路里消耗等。

此外,您还可以设置运动目标,在达到目标后,手环会自动提醒您。

在运动结束后,您可以通过华为Health应用查看更加详细的运动数据,并与好友进行比较和竞争。

华为Band 2还支持消息提醒功能。

当您的手机收到短信、电话和社交媒体消息时,手环会通过震动和屏幕显示进行提示。

您可以通过华为Health应用设置手环显示的消息类型和优先级,并自定义来电拒接、久坐提醒等功能。

最后,华为Band 2还具备防水功能。

您可以佩戴手环进行洗手、游泳等一系列水中活动,而不用担心手环受损。

不过,请注意,尽量避免长时间浸泡在水中,以免影响手环的使用寿命。

总的来说,华为Band 2是一款非常实用的智能手环,它不仅具备基本的计步、心率监测等功能,还拥有睡眠监测、运动记录等更加智能化的特色功能。

中药化学教学课件6-2检识与结构鉴定

中药化学教学课件6-2检识与结构鉴定

6.88(1H,H-8)
7.92(1H,dd, J=1.0,8.0Hz,H-5)
6.90(1H, dd,H-6),
四、黄酮类化合物的氢谱
B环上的芳氢
HO
O
3' OR
2' 5'
6'
OH OH O
B环上的芳氢(H-3’,5’ 较为高场): H-3’, 5’ :δ 6.5-7.1(2H,d, J≈8.5 ) H-2’, 6’:δ 6.5-7.9( 2H,d, J≈8.5 )
四、1H-NMR的应用: ——是分析黄酮结构的重要方法
测定黄酮溶剂:氘代溶剂
氘代溶剂
CDCl3 DMSO-d6:溶解范围广,信号分辨力强,可以
鉴别黄酮母核上酚OH
12.40 ppm (5-OH) 10.93 ppm (7-OH)
9.70 ppm (3-OH)
加入D2O消失
氘代吡啶 CCl4 :三甲基硅醚衍生物
依次为:苷元>单糖苷>双糖苷。
练习题
B﹥D﹥A﹥C﹥E﹥F。
1.下列化合物进行PC,以BAW系统(4:1:5, 上层)展开,判断其Rf值大小。
A.木犀草素(5,7,3′,4′-四OH黄酮) B.刺槐素(5,7-二OH ,4′-OCH3黄酮) C.槲皮素(5个OH) D.芹菜素(3个OH) E.槲皮苷(槲皮素-3-O-鼠李糖苷) F、芦丁(槲皮素-3-O-芸香糖苷)
7.54(1H,dd,J=8. 5,2.5Hz,H-6')
7.68(1H,d,J= 2.5Hz,H-2')
6.87(1H,d, J=8.0Hz,H-5')
化合物结构式:
HO
O
OH OH
-31邻二
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

Short Answer QuestionsDirections: In this part there is a short passage with five questions or incomplete statements. Read the passage carefully. The answer the questions or complete the statements in the fewest possible words.1Tea is another popular drink. Whether it is black tea, or some kind of social tea, tea is drunk by millions of people each day. Tea drinking first began in China. The plants were discovered in central China in the province of Sichuan, and as tea drinking became fashionable, large areas of Sichuan were used for growing tea. Later, tea drinking spread to India and Japan as Chinese culture began to interact with Indian and Japanese culture. There appears to be direst connection between the spread of Buddhism and the spread of tea drinking. Buddhist monks were tea drinkers. As Buddhism spread, the people in India and Japan took up tea drinking, along with other Buddhist practices.Questions:1. According to the speaker, how many people drink tea every day?2. In which country did tea drinking begin?3. Where were the tea plants first discovered in China?4. When did tea drinking spread to India and Japan?5. What made tea drinking popular in India and Japan?Answers(答案)1. It is drunk by millions of people.2. Tea drinking began in China.3. They were first discovered in central Sichuan.4. When Chinese culture began to interact with theirs.5. The Buddhism spread.2Money is a big problem. Bill does not earn a very good salary, and their income is hardly enough for three people to live on, so they have to be very careful about what they spend. They can not really afford to keep the car, and will have to get rid of it soon, but they have decided to put off selling it until Sally id old enough to go to school by bus. They are just not able to save money, and they are extremely worried about their old age. Sally wants to be a teacher when she grows up, but Ann and Bill hope she will do something where she can earn enough money to live a better life than her parents.Questions:1. How many people does the author mention in the passage?2. What is the relationship between Ann and Bill?3. How does Sally go to school?4. What will Sally want to be in the future?5. Does Bill earn a lot of money?答案:1. The author mentions three people.2. They are wife and husband.3. Sally goes to school by car.4. She wants to be a teacher.5. No.3I did not use to be a very tidy person, but my mother was. So she was always telling me to pick thing up and put them away, and do this and do that. My father was not like that at all. He let me do what I wanted. When he was free, he would take us out for walks, picnics and going for rides ion Sunday afternoons. Every Friday, when he came home from work, he bought pleasure to each of us. My mother used to say he was spoiling us, but why not? It did not do us any harm.1. What kind of person was my mother?2. Who let me do what I wanted?3. What did my father use to do when I was free?4. What did my father bring home on Fridays?5. Which way was thought better, the mother‘s or the father‘s?答案:1. My mother was a very tidy person.2. My father let me do what I wanted.3. He used to take us out for walks, picnics or rides.4. He bought home pleasure to each of us.5. The father‘s way was thought better.4I studied economics at university, and then I was lucky because I got a job very quickly as an accountant in a local department store. It was not exactly what I wanted, but you know it was a first job. I stayed there for four years altogether. After three years I was promoted to accounts manager, and I stayed in that job for a year, but then I really got bored, so I decided to leave and I applied for other jobs in the area. But I had no luck getting a second job at all, and I was very short of money, so in the end I had to get a job working as a waitress in a restaurant.1. Where did the girl get the first job?2. How long had the girl kept the first job?3. Why did the girl leave the position?4. Where did the girl want to get a second job?5. What was the second job the girl had to get?答案:1. She got the first job in a local department store.2. She had kept the job for 4 years.3. Because she thought that the job was very boring.4. She wanted to gat the second job in the area.5. The second job the girl had to get was a waitress in a restaurant.5Professor Carson lived alone and was very absent-minded. He often arrived at the college to give a lecture and find he had forgotten to bring his teaching notes and did not know what to say. Or he would lose his glasses and be unable to see the blackboard or his students. If he did not forget his notes and could give lectures, he would often forget the time and keep on talking for hours because he had left his watch at home. But the most interesting thing about him was his appearance. His coat was rarely buttoned, as most of the buttons were missing. He must have lost his comb as well because his hair was always standing on end when he took off his old hat. His trousers were held up by an old tie instead of a belt.1. What happened when Professor Carson had forgotten to bring his teaching notes?2. Why was he unable to see the blackboard or his students sometimes?3. What would Professor Carson do when he had no watch?4. Why did Professor Carson rarely button his coat?5. What was used to hold up his trousers?答案:1. He would be unable to give a lecture.2. Because he had lost his glasses.3. He would keep on talking for hours.4. Because most of the buttons were missing.5. His trousers were held up by an old tie (instead of a belt).6Sam Taylor lives in London. He is married and has two small children. He teaches in a secondary school. He gets up at half past six in the morning and has breakfast at seven o‘clock. He starts work at eight o‘clock and leaves work at four o‘clock. He likes his job because he likes teaching children. But he does not teach every day. On Tuesdays and Thursdays he stays at home with his children. He likes reading and watching television. At weekends he goes shopping and visits his friends.1. Where does Sam live?2. What is he?3. When does he get up?4. Why does he like his job?5. What does he do at weekends?答案:1. He lives in London.2. He is a teacher.3. He gets up at half past six.4. Because he likes teaching children.5. At weekends he goes shopping and visits his friends.7The best—almost the only—place to hear the original jazz is in a small building in the center of one of the city. There, seven different bands, made up mostly of very old men, play the old music for four-and-a-half hours each evening. Some of the people in the audience are tourists, bus most are serious music lovers who are willing to spend time sitting on wooden chairs and benches, and even on the floor. The musicians play the music they want to play, but people in the audience can make special requests if they are willing to pay for them. Traditional songs cost one dollar and all others cost two—except the most traditional song of all, ―The Saints‖. The musicians are so tired of playing it that it costs five dollars.1. Why do people go to the small building?2. How many hours do the musicians play each evening?3. What costs one dollar?4. What costs five dollars?5. Why do the musicians want five dollars for playing ―The Saints‖?答案:1. People go to the small building to listen to the best, original jazz.2. Each evening, the musicians play four and a half hours.3. A traditional song costs one dollar.4. The most traditional song (The Saints) costs five dollars.5. Because they are tired of playing it.8The US bought Alaska from Russia about 100 years ago. Alaska is more than twice as big as Texas. It has many different kinds of weather. In some areas the temperature can go as low as 57℃below zero. It can also go as high as 38℃above zero. Alaska has a longer coastline than all the other states together. The there is still owned by the US government, not by people or businesses.Alaska is the biggest state, but it has the fewest people. Towns are far apart. Long roads cost a lot to build in such wild country. So there are not very many roads. Many people use planes to travel in the state. Others travel in boats along the coast. Rivers freeze in winter, but boats travel on them when summer comes.1. In which century did the US buy Alaska from Russia?The US bought it from____________________________________________________________.2. Which state is Alaska compared with in size?______________________________________________________________________________.3. What can we learn about the location of Alaska from the first paragraph?It must be located_______________________________________________________________.4. What is the problem to build long roads in Alaska?To build long roads there__________________________________________________________.5. What are the major means of transportation in Alaska?The means of transportation there are__________________________________________答案:1. in the nineteenth century2. Texas3. at the seaside, the longest coastline in the US4. would coast a lot5. planes and boats9Do you ever wonder whether we can foresee(预见) the future? I once read a story which almost made me think that at least some people can foresee the future.A man who lived on his own in a small flat was sitting reading one evening when he suddenly smelled smoke coming off somewhere in the flat. He immediately got up and went to the kitchen when he thought he must have left something on the gas. There was certainly a smell of smoke, but there was nothing burning. Then he got in the hall and bathroom, but he still could not find anything burning. When he went outside the flat, there was no smell of burning, so, thinking it must be his imagination, he went back to his reading.A month later, he returned from a business trip to find firemen putting out fire in his flat. They told him that some electric wires had short-circuited(短路) and caused the fire and that he should have had the flat rewired(重装电线) a long time ago. So was it simply that the wire had started burning slowly a month before when he smelled smoke, or had he in fact ‖seen into the future‖?1. What happened to the man one evening?He ____________________________ in the flat while reading.2. Why did he go to the kitchen?Because he thought he ________________________________.3. What did he think when he failed to find anything burning?He thought that it _____________________________________.4. What is the cause of the fire?The fire was caused by _________________________________.5. What does the author intend to show in the passage?The author intends to show that_________________________________.答案:1. smelled smoke coming off somewhere2. must have left something on the gas3. must be his imagination4.short-circuiting5. at least some people can foresee the future10With the help of a computer, Paul feeds his herd of seventy cows. Each of Paul‘s cows wears an electronic device called transponder(应答器) on chain around her neck. Paul programs into the computer how many pounds of grain each cow needs. In the feeding stall(厩), an identifier can tell from the transponder which cow is approaching the feeder. It then releases the exact amount of grain that cow is approaching the feeder. It then release the exact amount of grain that cow issupposed to have.Once a day, the computer gives Paul a printout that tells him how much feed each cow ate. This is important to know, because if a cow is getting sick, she doesn‘t eat much. Then Paul makes sure she gets the treatment she needs.1. How does Paul feed his cows?________________________________________________________________________2. What‘s the function of the transponder?________________________________________________________________________3. What does a printout help Paul to know?________________________________________________________________________4. If a cow eats, what has happened to it?________________________________________________________________________5. What can we infer from this passage?答案:1. He feeds his cows with the help of a computer.2. It can tell how much feed a cow needs.3. How much a cow eats.4. It gets sick.5. Computers can help farmers work more efficiently.11One of the difficulties with recognizing an alcohol problem is that moderate drinking is acceptable social behavior. More than 60 percent of American women and nearly 80 percent of American men are drinkers. It‘s easy to hide the beginning of a drinking problem from your friends and from yourself.American attitudes about alcohol are complicated and confusing. Full-color magazine ads show rich, beautiful, and happy people socializing over martins, champagne, or whatever the ad is promoting. It‘s supposed to be manly, as well.Some people think of alcohol as a magic formula. It cheers you up and it calms you down. It helps you get to sleep; it‘s an ―eye opener‖; and it gives you the courage to face the boss. It makes problems disappear, and in social situations it makes you feel you‘re the world‘s most fascinating conversationalist.1. Why is it difficult to cope with alcohol problems?_________________________________________________________________________ 2. In what way is alcohol advertised according to the passage?________________________________________________________________________3. What do Americans think of male drinkers?________________________________________________________________________4. What could you infer from the last sentence?________________________________________________________________________5. What conclusion can we draw from the passage?答案:1. Because drinking is acceptable social; behavior.2. In full-color magazines.3. They look manly.4. Alcohol can make some people very talkative.5. It is not easy to solve alcohol problems in America.12Meteor-psychologists are also studying other factors. They are trying to determine how and how much temperature changes and air pressure changes can affect people. Temperature change is relatively easy to understand. When temperatures go up or down, people‘s attitude and behavior change. In general, people tend to feel more hopeful when winter is over and temperatures being to rise, and slightly sad as winter comes.Air pressure also affects people. About one or two days before a storm, the air pressure falls. When this occurs, people are more likely to feel uncomfortable and a little depressed. During these times of discomfort, people are less likely to be able to concentrate. People are less careful and less alert. As a consequence, accidents are more likely to occur. In several factories that have been studied, it appears that more injuries and accidents have happened when the air pressure was low. Some factory managers are now trying to develop work systems which will allow employees to take a day off or change to less dangerous work actives on days when there is a greater chance to less dangerous work actives on days when there is a greater chance that accidents will occur because of the air pressure.1. Why are meteor-psychologists interested in studying weather factors?They want to know_____________________________________________________________.2. How do people feel about the coming of spring?They feel____________________________________________________________________.3. What will happen to man if the air pressure falls?He__________________________________________________________________________.4. When are accidents more likely to take place?They are_____________________________________________________________________.5. Why do some factory managers develop some new work system?They want to_________________________________________________________________. 答案:1. how weather factors affect people2. hopeful3. feels uncomfortable and a little dressed4. more likely to occur when the air pressure is low5. avoid chance when accidents are likely to occur13Hobbies are things people like to do in their spare time. When they are free, people raise pets, build model ships, weave baskets, or carve soap figures. They watch birds, hunt animals, climb mountains, raise flowers, fish, ski, skate, and swim. They also paint pictures, attend concerts and plays, and perform on musical instruments. They collect everything from books to butterflies, andfrom stones to stamps.People take up hobbies because these actives offer enjoyment, friendship, knowledge and relaxation. Sometimes they yield financial profits. Hobbies help people relax after periods of hard work, and provide a balance between work and play. Hobbies also offer interesting activities for people who have retired. Anyone, rich or poor, old or young, sick or well, can follow a satisfying hobby, regardless of his age, position, or income.Hobbies can help a person‘s mental and physical health. Doctors have found that hobbies are valuable in helping patients recover from physical or mental illness. Hobbies give patients something to do and provide interests that keep them from thinking about themselves. Many hospitals treat patients by having them take up interesting hobbies or pastimes.1. What are hobbies?2. Tom is a gardener in our school. Does he raise flowers as a hobby?3. Why do people take up hobbies?4. What kinds of people can have a hobby?5. In what way can hobbies help patients?答案:1. Hobbies are things that people like to do in their spare time.2. No, he doesn‘t.3. Because these activities offer enjoyment, friendship, knowledge and relaxation.4. Anyone can.5. Hobbies give them something to do and provide interests to keep them from thinking themselves.14When you first arrive at a large party, the host or hostess may introduce you to tow or three people nearby, but if others are still arriving, he or she may then return to greet new comers, expecting you to go on by yourself, moving from group to group. If this feels too uncomfortable and frightening, it is quite all right to say to someone, ―I am a stranger here and know no one. Could you introduce me to some of the people?‖ Almost anyone will feel good that you turn to him for help and will gladly introduce you and make you feel easy.1. What may the host or hostess do to you at a big party?2. Why do they leave you to go by yourself?3. What will you do when you feel uncomfortable?4. How could other people feel when you turn to him?5. What will they do?答案:1. The host and hostess may introduce you to two or three people.2. Because they have to greet new comers.3. To ask someone to introduce you to some of the people.4. They would feel glad.5. They will introduce you and make you feel easy.15What‘s the best way to carry money safely while you‘re traveling? There are three possibilities-personal checks from your country, travelers check and cards. Some American banks accept foreign checks but the problem is that those banks dealing with foreigners are not many.It may be more convenient to carry travelers checks in dollars. If your checks aren‘t in dollars, it may take you a long time to find a bank that will change them. You can use travelers checks almost anywhere-in restaurants, stores or ticket offices-without having to go to a bank.Americans would say the best way to carry money is to have a major credit card like Visa, Master Card or American Express. Because they are widely accepted in the US, it is easy to use them to pay for hotels, transportation, meals and things you want to buy from larger stores.Of course you can‘t get along without cash, but you don‘t need to carry much with you.1. What is the trouble to carry foreign personal checks while traveling in the US?2. Why should the travelers checks be in dollars?3. What would American do with their money if they go traveling?4. What would be probably used to pay to buy a newspaper?5. Whom does the author most probably write this passage for?答案:1. Many banks there will not accept foreign personal checks.2. One can use them directly without exchanging them in a bank.3. They would carry a major credit card.4. One would pay cash to buy a newspaper.5. He writes it for foreigners traveling in the US.Short Answer QuestionsDirections: In this part there is a short passage with five questions or incomplete statements. Read the passage carefully. The answer the questions or complete the statements in the fewest possible words.1As researchers learn more about how children‘s intelligence dev elops they are increasingly surprised by the power of parents. The power of the school has been replaced by the home. To begin with all the factors which are part of intelligence—the child‘s understanding of language learning patterns curiosity—are established well before the child enters school at the age of six. Study after study has shown that even after school begins children‘s achievements have been far more influenced by parents than by teachers. This is particularly true about learning that is language-related. The school rather than the home is given credit for variations in achievement in subjects such as science.In view of their power it‘s sad to see so many parents not making the most of their child‘s intelligence. Until recently parents had been warned by educators who asked them not to educate their children. Many teachers now realize that children cannot be educated only at school and parents are being asked to contribute both before and after the children enter school.Parents have be en particularly afraid to teach reading at home. Of course children shouldn‘t be pushed to read by their parents but educators have discovered that reading is best taught individually—and the easiest place to do this is at home. Many four and five-year-old who have been shown a few letters and taught their sounds will compose single words of their own withthem even before they have been taught to read.1. What have researchers found out about the influence of parents and the school on children‘s intelligence﹖2. What do researchers conclude about children‘s learning patterns﹖3. In which area may school play a more important role﹖4. Why did many parents fail to make the most of their children‘s intelligence﹖5. The author suggests in the last paragraph that parents should be encouraged to____.答案:1. Parents have greater influence than the school.或Parent‘s influence is greater than the school‘s.2. They are established well before the age of six.3. In science subjects.4. They were told not to educate their children5. Teach reading at home.2We commonly think of sportsmanship in connection with athletic contests, but it also applies to individual outdoor sports. Not everyone who picks up a fishing rod or goes out with a gun is a sportsman. The sportsman first of all obeys the fish and game laws, not because he is liable to be punished as a violator, but because he know that in the main these laws are made for his best interests.The following are some of the things that those who would qualify for membership in the sportsmanship fraternity (圈内人) will do.1. Take no more game than the bag limit provided for by the fish and game laws. The person who comes back from a trip boasting about the large number of fish or game taken is not a sportsman but a game hog (贪得无厌的捕猎者) .2. Observe the unwritten rules of fair play. This means shooting game birds only when the birds are ―on the wing‖. For the same reason, do not use a shotgun to shoot a rabbit or similar animal while it is sitting or standing still.3. Be careful in removing illegal or undersized fish from the hook. This should be done only after wetting the hand. This is necessary because the body of the fish is covered with a thin, protective film which will stick to your dry hands. If the hands are dry when the fish is handled, the film is torn from the body of the fish. Without the protective film, the fish is more easily attacked by diseases. If you wish to release a fish that is hooked in such a way that it will be impossible to closed to the hook as convenient. In a remarkably short time, the hook will break down and the fish will remain almost unharmed. Fish have been known to feed successfully while hooks were still in their lips.4. Be sure of the identity of your target before you shoot. Many useful and harmless species of wildlife are thoughtlessly killed by the uninformed person who is out with a gun to kill whatever flies within range.1. In what respect does the author think individual outdoor sports are similar to athletic contests?2. What are people called when they break the bag limit and boast about their big catch?3. A true sportsman will not shoot an animal which is not ______4. What are people advised to do before they remove illegal or undersized fish from the hook?5. What should sportsman do to avoid killing rare species of wildlife?答案:1. Both of them are in common with sportsmanship2. A game hog.3. moving4. To wet their hands.5. They should know the identity of the target.3Sports is one of the world‘s largest industries, and most athletes are professionals w ho are paid for their efforts. Because an athlete succeeds by achievement only—not by economic background or family connections—sports can be a fast route to wealth, and many athletes play only for money than for love.This has not always been true. In the ancient Olympics the winner got only a wreath of olive leaves (橄榄叶花环). Even though the winners became national heroes, the games remained amateur for centuries. Athletes won fame, but no money. As time passed, however, the contests became increasingly less amateur and cities began to hire athletes to represent them. By the fourth century A.D., the Olympics were ruined, and they were soon ended.In 1896, the Olympic games were revived (使再度兴起)with the same goal of pure amateur competition. The rules bar athletes who have ever received a $50 prize or an athletic scholars or who have spent four weeks in a training camp. At least one competitor in the 1896 games met these qualifications. He was Spiridon Loues, a water carrier who won the marathon race, After race, a rich Athenian offered him anything he wanted. A true amateur, Loues accepted only a cart and a horse. Then he gave up running forever. But Loues was an exception and now, as the Chairman of the German Olympic Committee said, ―Nobody pays any attention to these rules.‖ Many countries pay their athletes to train year-round, and Olympic athletes are eager to sell their names to companies that make everything from ski equipment to fast food.Even the games themselves have become a huge business. Countries fight to hold the Olympics not only for honor, but for money. The 1972 games in Munich cost the Germans 545 million dollars, but by selling medal symbols, TV rights, food, drink ,hotel rooms, and souvenirs (纪念品), they managed to make a profit. Appropriately, the symbol of victory in the Olympic Games is no longer a simple olive wreath—it is a gold medal.1. To many people, sports today is nothing but___________.2. What do most athletes of today go after?________.3. What reward could an ancient Greek athlete expect?4. When the Olympic Games were revived in 1896, athletes who had received specialtraining in camps would be_____.5. What did Spiridon Loues do after he accepted the Athenian‘s gift?答案:1. a fast route to wealth。

相关文档
最新文档