练习10

基本逻辑门电路典型练习题101．监控系统控制电路如图所示，电键S闭合时，系统白天和晚上都工作；电键S断开时，系统仅晚上工作．在电路中虚框处分别接入光敏电阻（受光照时阻值减小）和定值电阻，则电路中，C是____________（选填“与门”、“或门”或“非门”），光敏电阻是__________（选填“A”或“B”）【答案】或门B【详解】由题意可知：S断开时监控系统晚上光线较暗时自动开始工作，白天光线不暗时不工作，所以滑动变阻器与光敏电阻相连，即光敏电阻是B；S闭合时，监控系统白天和晚上都能工作，所以电键S应与定值电阻相连，C中两个条件有一个满足就工作，所以C是或门.考点：逻辑电路.2．如图是一个应用某逻辑电路制作的简单车门报警电路图．图中的两个按钮S1、S2分别装在汽车的两道门上．只要其中任何一个开关处于开路状态，发光二极管（报警灯）就发光．则该逻辑电路是___门电路，并在图中画出这种门电路的符号；当S1、S2都闭合时，A、B的输入都为___，Y端输出为____；当S1断开时，___端的输入为1，Y端输出为____．（门电路有输入电压或有输出电压都记为1，无输入电压或无输出电压都记为0）【答案】或00A1【详解】驾驶员离开汽车后，两个车门均处于关闭状态，与两个车门对应的开关S1和S2均闭合，这时发光二极管不会发光报警.因为S1和S2闭合后，电流不通过发光二极管.当有其他人打开了某一个门时，S1或S2就处于断开状态，这时就有电流通过发光二极管，使其发光报警.可见，这一装置实际上是一个“或”门电路.. 当S1、S2都闭合时，A、B的输入都为0时，，Y端输出为0，当S1断开时，A端的输入为1，Y端输出为1考点：考查了逻辑电路的应用点评：关键是理解或门逻辑电路的特点3．逻辑电路在电子线路中有着重要的应用.某词学利用“非”门电路设计了一个路灯自动控制R，是一个光敏电阻，门电路.天黑了，让路灯自动接通；天亮了，让路灯自动熄灭，图中G与有光线照射时，光敏电阻的阻值会显着减小，R是可调电阻，起分压作用.“非”门电路能将输入的商电平转变为低电平，或将低电平转变为高电平，J为路灯总开关控制继电器，它在获得高电压时才启动（图中未画路灯电路）（1）当天黑时，G R变大还是变小？“非”门电路获得高电平还是低电平？J得到高电压还是低电压？（2）如果路灯的开关自动接通时天色还比较亮，现要调节自动控制装置，使得它在天色较黑时才会自动接通开关，应将R调大一些还是调小一些？【答案】(1)大，低，高(2)大【详解】（1）天黑时，光线减弱，光敏电阻RG变大，A端输入低电压，Y端输出高压信号，J得到高压，开始控制路灯工作。

京东考试练习题10问题1:问：下列关于小智开启说法错误的是？答案：客服下班后，需要手动开启京东小智问题2:问：京挑客的通用计划可以暂停，可以修改佣金比例？答案：错误问题3:问：京东商品主图的数量有多少？答案：1--10张问题4:问：京东物流体系拥有几大物流网？答案：6大问题5:问：京东直播是否可以直播原石答案：不可以，一经发现永久封号问题6:问：哪个渠道依附于搜索端的展示内容渠道？答案：京挑细选问题7:问：商家在参加京东开放平台的促销活动前答案：不可以问题8:问：客户退货后，退回京东余额的时效是多久？答案：2-3个工作日问题9:问：哪个渠道依附于搜索的展示内容渠道？答案：京挑细选问题10:问：京东商城是否接受个体工商户的入驻申请？答案：不接受问题11:问：商家是否可以申请京东介入？答案：可以问题12:问：京腾魔方标签人群生效时间为几分钟？答案：3分钟问题13:问：违规商家接受国家法律法规的处罚后，是否可以免除京东开放平台对其违规行为的处理？.答案：否问题14:问：京东新业态展示包括？答案：京东到家问题15:问：消费者发起纠纷单后，纠纷单流转至商家端，如商家（）小时未回复，则系统自动京东介入。

.答案：36问题16:问：商家未能按照《京东开放平台商家售后服务管理规则》的规定在有效时间内响应及处理消费者提交的售后服务申请的，每次扣多少分？答案：1分问题17:问：京东搜索的排名是基于?答案：SKU问题18:问：京东直投-腾讯资源-高级定向-用户行为兴趣定向—用户兴趣定向可以选择哪些？答案：类目问题19:问：下列哪种刀具不属于《京东禁发商品及信息管理规范》中禁止发布的商品？答案：B.未开刃的用于摆设装饰的工艺刀类问题20:问：品牌聚效账户搭建流程-京选店铺在计划中，设置计划类型为？答案：京选店铺问题21:问：王先生跟京东商城合作半年，但是由于个人原因不想跟京东商城继续合作，终止协议后王先生的平台使用费是否可以退回？答案：不可以问题22:问：选项中关于京豆使用用途描述错误的是？答案：京豆可用于购买超值商品：只使用京豆购买热销商品问题23:问：京小贷最长贷款期限是多久？答案：12个月问题24:问：下列关于保证金的说法，正确的是？答案：当卖家发生违约、违规行为时，京东可以依照与卖家签署的协议中相关约定及京东开放平台规则扣除相应金额的保证金作为违约金或给予买家的赔偿问题25:问：下列关于小智开启说法错误的是哪一个？答案：客服下班后，需要手动开启京东小智问题26:问：以下不属于京券使用要求的选项是？答案：全部商品都能使用问题27:问：哪种类型的商家投放京挑客时需要预充值？答案：POP问题28:问：如果商家对纠纷仲裁结果不满意，京东仲裁判责完成后（）天内，商家可以提起申诉，超过（）天，将无法提起申诉。

六年级语文阅读理解练习题阅读短文，回答问题。

群众也在淋雨1965年夏季的一天,三千多名手持鲜花的群众聚集在上海机场,他们是来欢送一位外国元首的。

这时,周总理陪同外宾健步走来,人群中立即响起了一片欢呼声。

总理不时抬起那负过伤的右臂,向欢呼的人群招手致意。

那慈祥的目光,那亲切的微笑,那文明的举止,使人难以忘怀。

突然,乌云蔽日,雷声隆隆,刚刚还是晴朗的天空霎时变了脸。

客人刚刚登机,大雨就倾盆而下,人群出现了小小的骚动。

“看,我们的总理!”突然,有人喊了起来。

显然是由于激动,声音有些发颤(chàn zhàn)。

人们不由得把目光投向周总理。

只见他还是彬彬有礼地站在原地,向飞机上的外宾招手致意。

群众看见了,也很有礼貌地站在原地。

工作人员怕把总理淋病了,为总理撑起了雨伞。

周总理轻轻地摆摆手,谢绝了。

又一位工作人员再次上前为总理撑起了雨伞,并恳求道:“总理,您就挡挡雨吧!”周总理转过头:“你看,群众也在淋雨,我怎么不能呢?”外宾的专机起飞后,周总理浑身都湿透了,雨水顺着脸颊不停地往下淌。

工作人员又心疼,又着(zhuózháo)急,忙递上一条毛巾:“总理,您擦把脸吧!”周总理接过毛巾,却没有忙着擦脸上的雨水,而是对工作人员说:“赶紧告诉有关同志,动员机场和附近单位的食堂烧些姜汤,给挨雨淋的群众驱驱寒,暖暖身子。

”在括号里正确的读音上面打“√”。

2.照样子,写词语。

雷声隆隆:彬彬有礼:3.把句子改写成带有“说”的句式。

周总理转过头:“你看,群众也在淋雨,我怎么不能呢?”4.读文中画线的句子,注意加点的词语,说说你从中体会到了什么?5.第2自然段写雨中送行的场面,既关注了送行的群体,又关注了送行的个人,这样写有什么好处?6.“群众也在淋雨”是谁说的话?用这句话作为文章题目,有什么作用?六年级答案：2.风尘仆仆小心翼翼步步为营津津有味3.周总理转过头,说:“你看,群众也在淋雨,我怎么不能呢?”4.强调“负过伤”,说明周总理右手不便,而他不时抬起的恰恰是他“负过伤的右臂”,表现了周总理对人民群众的礼遇与尊重。

高中英语语法填空专项练习10篇一It's almost a common belief that the best food you can find in a place is notin the fancy restaurants, 1 in the backstreets.These spots are usually away from popular tourist attractions, which means that to find them you'll need the spirit of an 2 (explore)．That's how I came across roujiamo when I was exploring Beijing. I found 3 restaurant that sold dishes from Xi'an when I explored the area around 4 (I) office one day.I decided to try it out.My roujiamo 5 (make) fresh, so the bread was still warm.It was soft when Ibit into it, and the meat inside was delicious and tender.In fact, I enjoyed it somuch that I ordered more to take home with me. Though it's just a snack, it's still quite filling and can 6 (easy) satisfy your appetite., as the bread is There are a 7 (various) of things you can put inside the “mo”called. For example, in certain areas in Xi'an, the meat 8 (use) is usually beef, but in Gansu Province, mutton is more common.And the first roujiamo that I tried was made 9 pork. However it's made, it's still a tasty snack. And for an American like me who grew up 10 (eat) hamburgers, it's a perfect combinationof East and West.二According to the UK Parliament, Big Ben, which is considered as 1 landmark building in London, will keep silent for four years as major conservation works are carried out on the tower that houses the bell. Visitors to London may feel 2 a pity that they won't hear the chimes (钟声) in the next few years.The chimes from the bell, one of London's most famous __3__ (attract), have kept time in the British capital for 157 years. At noon on August 21, 2017, BigBen sounded for the last time until 2021. The repairs 4 (assess) at around ￡29 million. Big Ben 5 (fall) silent is a significant milestone in this 6 (extreme) important conservation project. This important program ofworks will safeguard the clock __7__ a longterm basis, as well as protecting and preserving its home.Big Ben is the name of the bell inside the tower (St. Stephen's Tower, renamed Elizabeth Tower in 2012), and not the building or the clock simply 8 (know) as the Great Clock itself.The chimes were last silent in 2007 during conservation and before that from 1983 to 1985 during a period of refurbishment (翻新). Londoners, however, needn't worry 9 Big Ben will continue to strike for important __10__ (nation) events such as New Year's Eve and Remembrance Sunday.三Spring Festival is the most important of the traditional Chinese festivals. It 1 (call) “Lunar N ew Year”， because —as part of the lunisolar (阴阳的) Chinese calendar — the date is partially determined based on lunar phase (月亮或行星的相位). The festival traditionally __2__ (begin) on the first day of thefirst month in the Chinese calendar and ends with Lantern Festival 3 is on the 15th day. Chinese New Year's Eve, a day when Chinese families gather for their annual reunion dinner, is known as Chu Xi. It literally means “Year-pass Eve”．According to 4 (tale) and legends, the beginning of Chinese New Year started with the fight against 5 mythical (神话的) beast called Nian (年兽). Nian would come on the first day of New Year to devour livestock (牲畜), crops, and even villagers, __6__ (especial) children. To protect 7 (them)， the villagers would put food in front of their doors at the beginning of every year. Itwas believed that after the Nian 8 (eat) the food they prepared, it wouldn't attack people any more. One time, people saw that the Nian was scared away bya little child wearing red. The villagers then understood that the Nian was afraid 9 the colour red. Therefore, every time when the New Year was about to come, the villagers would hang red lanterns and red spring scrolls on windowsand doors. People also used fireworks 10 (frighten) away the Nian. From then on, Nian never came to the village again.四Zhangjiajie consists of the district __1__ Yongding and counties of Cili and Sangzhi. Also within it is located Wulingyuan Scenic Area which 2 (name) a UNESCO World Heritage (遗产) Site in 1992. Senior experts from UNESCO were amazed at its unique natural scenery, near perfect biological system,and creative 3 (combine) of nature and humanism.The Wulingyuan Scenic and Historic Interest Area 4 (make) up of the Zhangjiajie National Forest Park, the Tianzishan mountain ranges, Baofenghu and the Suoxi Valley is 5 very popular filming and tourist destination. Also in the Zhangjiajie area, Huanglongdong and Longwangdong are caves known for many natural rock formations and __6__ (they) underground cataract (急流). Each year, Zhangjiajie hosts the International Country Music Week Festival, __7__ (feature) international acts such as American country music group Lucy Angel.The city has built 12 state-level tourist areas, of __8__ one is 5A class scenic spot and four sites are 4A level. It attracts visitors from all over China and other Asian countries such as Korea, and is 9 (increase) popular among other international tourists. Since Zhangjiajie has been __10__ (improve) its transportation and service for long, the city now can receive 36,200 tourists per day.五From the first day I arrived in Kunming, I had my understanding ofChina 1 (change). Far from being narrow-minded and hostile to 2 (foreign)，people came up to talk to me the first time I went out on the street. It happened to be3 it did cause me to rethink myall in Chinese, so I didn’t understand much,assumptions.As my Chinese improved, this continued throughout my stay, from my landlord introducing me to people who could help us learn Chinese to 4 (get) to know the couple who ran a noodle restaurant nearby.If you’re interested in other people, their culture, and their language, they6 exception.be 5 (friend) to you. China isn’ｔDon’t judge a country by its media coverage, 7 (especial) some Western media, which have much prejudice.I saw a very different kind of China with my own eyes. Kunming, 8 I livedI had frank conversations with Chinese for most of my stay, wasn’t much polluted.people about almost everything.Still China 9 (develop)，but the economic growth means that mostpeople 10 (see) their living standards improve rapidly in the last 20 years. People I spoke with were generally optimistic about the future.六My hometown is a small municipality (自治镇) called Aschach in the Austrian state of Upper Austria.The town 1 (locate) in the Danube Valley and has a population of 2,190. First 2 (mention) in the year 777, Aschach has a historic center with beautiful houses and courtyards, including a castle. Tourists can enjoy architectural styles from the Gothic, Baroque and Renaissance. As Austria is pretty small, we can __3__ (easy) travel to many other European countries. For example, I can drive to Germany within one hour. To the Czech Republic it just takes me 30 minutes.In general, Austrian people pay a lot of attention to the environment andtry 4 (live) in harmony with nature. Many of them grow 5 own vegetables orbuy 6 (agriculture) products from nearby farmers.I __7__ (live) in Beijing for a long time up to now. __8__ I miss most in the Danube are the starry sky, my family and friends. Aschach is a wonderful place and every time I go home, I feel relaxed and calm.It is one of the prettiest __9__ (village) in Austria and visitors from all around the world come to have a tour 10 it every year.七A material can be really special when it was named after the place where2 china. And of all types ofit 1 (create) originally. That’s certainly the casechina，white porcelain is among the most famous.Nowadays，the 3 (tradition) material has taken on a modern look in the 4 (hand) of four Chinese artists in the Modern White Porcelain Exhibition.. one of the works 5 (be) a porcelain boat. And the key word here is “modern”But look 6 (attentive) and you’ll s ee that the boat 7 (build) with porcelain looks like a takeout box. Inside the boat is a statue of a baby. The baby standsfor humans and the boat is 8 supports life. It suggests we may have done some damage to 9 environment and that we’re treating life like fast food.All the four artists gave white porcelain a modern style，each in 10 (they)theme comes from. It’s a dialogue own way. And this is what the exhibition’sbetween the past and the present.八China's icebreaker Xue Long will set sail from Shanghai to the Antarctic.Its captain Zhu Bing said that the icebreaker would first travel to the to-be-built new station before 1 (make) a short stop at Zhongshan station. One of its main tasks is to build another research station in the Antarctic.Once 2 (complete), the new station would be the country's third year-round station in the Antarctic and the first to be lying __3__ the border of the Pacific Ocean. __4__ other two stations, the Great Wall Station and the Zhongshan Station, __5__ (build) in the 1980s.“This time around, we will build a 206--square meter temporary base, which includes rooms for workers and a platformfor large engineering 6 (machine), to improve future construction work，” said Zhang Tijun of the Polar Research Institute of China, 7 is the assistant leader of the expedition.Sun Bo, the deputy director of the institute, was __8__ (confidence) to say that the construction of the station, which will 9 (definite) meet international criteria for environmental __10__ (protect), will be finished as early as 2022.九Clever student as Dongfang Liang is, he was badly addicted 1. ______online games a year ago.He often slipped to cybercafes at night，2. ______(feel) very sleepy in class in the daytime. 3. ______(need) to say，he got poor marks in all subjects. No matter what I advised，no matter 4. ______I punished him，he still broke the rule. Later I 5. ______(arrange) for his parents to rent a smallhouse near our school to keep him company，or exactly speaking，tosupervise him. But only a week later,I noticed him fall asleep constantly again. He must have played other tricks secretly. This time I demanded that his father 6. ______(sleep) with him in the same bedroom and watch him 7.______(close). Following my advice，his father did 8.______. Hardly has Dongfang Liang felt sleepy in class ever since，and he has made great progress in study.Last week，believe it or not，he sheepishly(难为情地) 9.______(admit) having read some ebooks under his quilt while he was lyingin bed before his father slept in his room. It is online 10.______(game) that poison our teenagers’ minds deeply.十Bike to Work Day was started by the League of American Bicyclists in 1956 with __1__ aim of promoting the bicycle as a serious choice of gettingto and from work. It is __2__ (annual) held across North America on the third Friday of May. In today's world __3__ global warming is a serious issue, the bicycle is a perfect way of reducing our carbon footprint. Cyclingto work is a healthy alternative __4__ driving or taking public transport. It can not only save you money but also enable you to be more __5__ (create)once you get to work, thus improving your performance.Bicycles are the most common form of transport in the world and there are about two billion in use worldwide, __6__ (make) the bicycle the most popular invention ever. When we think of some countries, like the Netherlands, we imagine __7__ (hundred) of people cycling everywhere. Even in high-tech Japan, it is impossible not __8__ (see) businessmen, farmers, mothers or workers in the streets on their bikes. Bicycles __9__ (invent) in the 19th century and haven't changed much since. Today, we use bicycles for pleasure, fitness, Olympic competitions, mail __10__ (deliver) and lots more. Without the bicycle, much of the world might stop working!一1．but2．explorer3．a4．my5．was made6．easily7．variety8．used9．with10．eating二1．a2．it3．attractions 4．are assessed5．falling 6．extremely7．on8．known9．because 10．national三1．is called2．begins3．which/that4．tales5．a 6．especially7．themselves8．ate9．of10．to frighten四1．of 2．was named3．combination 4．made 5．a6．their 7．featuring8．which 9．increasingly10．improving 五1．changed 2．foreigners3．but 4．getting5．friendly 6．an7．especially8．where 9．is developing 10．have seen 六1．is located 2．mentioned 3．easily 4．to live 5．their 6．agricultural 7．have lived 8．What 9．villages 10．of七1．was created 2．with 3. traditional 4．hands5．is6．attentively7．built8．what9．the 10． their八1．making 2．completed3．on4．The5．were built6．machines7．who8．confident9．definitely 10．protection1．to 2．feeling 3．Needless 4．how 5．arranged6．(should) sleep 7．closely 8．so 9．admitted 10．games十1．the 2．annually 3．where 4．to 5．creative6．making 7．hundreds 8．to see 9．were invented 10．delivery。

解方程练习题10道加答案1. 题目：求解方程 3x + 5 = 20解析：要解这道方程，我们需要将未知数 x 消去，并找到满足等式的解。

解答：首先，我们可以通过移项将方程转化为 3x = 20 - 5 。

简化计算后得到 3x = 15 。

接下来，我们将方程两边同时除以 3 ，得到 x = 5 。

所以，方程的解为 x = 5 。

2. 题目：求解方程 2(x - 3) = 4解析：这道题中，方程中含有括号，我们需要先将括号内的表达式进行运算，然后再继续解方程。

解答：首先，我们将方程中的括号展开，得到 2x - 6 = 4 。

然后，我们移项计算，将 -6 移至等式的右侧，得到 2x = 4 + 6 。

简化计算后得到 2x = 10 。

接下来，我们将方程两边同时除以 2 ，得到 x = 5 。

所以，方程的解为 x = 5 。

3. 题目：求解方程 4x + 6 = 14 - 2x解析：这道题中，方程中含有未知数 x 的系数为正负两个数值，我们需要将变量相同项合并，然后解方程。

解答：首先，我们将方程中的同类项合并，得到 4x + 2x = 14 - 6 。

简化计算后得到 6x = 8 。

接下来，我们将方程两边同时除以 6 ，得到 x = 8/6 。

简化计算后得到 x = 4/3 或 x = 1.33。

所以，方程的解为 x = 4/3 或 x = 1.33。

4. 题目：求解方程 2(x + 3) - 3(2x - 1) = 4x + 5解析：这道题中，方程中含有括号和多项式的运算，我们需要先将括号内的表达式进行运算，然后合并同类项，最后解方程。

解答：首先，我们将方程中的括号展开，得到 2x + 6 - 6x + 3 = 4x + 5 。

然后，我们合并同类项，得到 -4x + 9 = 4x + 5 。

接下来，我们将方程两边同时加上 4x ，得到 -4x + 4x + 9 = 4x + 4x + 5 。

简化计算后得到 9 = 8x + 5 。

Lesson 10 Not for jazzWhat happened to the clavichord?We have an old musical instrument. It is called a clavichord. It was made in Germany in 1681. Our clavichord is kept in the living room. It has belonged to our family for a long time. The instrument was bought by my grandfather many years ago. Recently it was damaged by a visitor. She tried to play jazz on it! She struck the keys too hard and two of the strings were broken. My father was shocked. Now we are not allowed to touch it. it is being repaired by a friend of my father’ s.jazz n. 爵士乐 recently adv. 最近 key n. 琴键musical adj. 音乐的 damage v. 破坏 shock v. 使生气, 震惊 instrument n. 乐器strike (struck; struck v. 打;击 allow v. 允许,让 clavichord n. 古钢琴 string n. (乐器的弦touch v. 触摸 Germany n. 德国Reading comprehension:1. The old musical instrument _____.A. has been in the family for a long timeB. was bought recentlyC. was sold recentlyD. was repaired recently2. How did the visitor damage the clavichord?A. She played jazz on it.B. She played it.C. She cut the strings.D. She hit the keys too hard.Answer the questions orally:What musical instrument do you have?Was it old or new?What happened to it recently?How was it damaged?Is it being repaired now?Structure & vocabulary:1. Our clavichord is kept in the living-room. That’ s where we _____ it.A. keptB. have keptC. are keepingD. keep2. It has belonged to our family. It’ s the _____.A. familiesB. families’C. family’ sD. familys’3. The family have had the clavichord _____ many years.A. sinceB. forC. fromD. by4. Who _____ it? Grandfather did.A. buyB. was boughtC. boughtD. did buy5. We are not allowed to touch it. We _____ touch it.A. mustn’ tB. mustn’ t toC. haven’ t toD. don’ t have to6. What ’ s it _____? A clavichord.A. toldB. saidC. calledD. spoken7. It ’ s kept in the living-room. That’ s where we _____ it.A. haveB. holdC. liftD. carry8. The visitor damaged it. She _____ it.A. hurtB. painedC. brokeD. destroyed9. Recently it was damaged. She damaged it _____.A. lateB. lastlyC. latelyD. finally10. A friend of my father’ s is _____ the clavichord.A. mendingB. makingC. doingD. buildingKey structures:a--Who built the bridge? --When was this bridge built?--Prisoners of war built this bridge in 1942.This bridge was built by prisoners of war in 1942.b Read these pairs of sentences carefully. The first sentence in each pair tells us about a person. The second tells us about a thing.Workmen are building a new road outside my horse.A new road is being built outside my house.The newsagent delivers our papers every morning.Our papers are delivered every morning.The postman delivered a letter this morning.A letter was delivered this morning.c Read these sentences:The police arrested the thief. The thief was arrested (by the police.He gave me a present. I was given a present.The headmaster has punished the boy. The boy has been punished (by the headmaster.ExercisesA. Answer these questions on the passage. Write a complete answer to each question:1. What is our old musical instrument called?2. Where was it made?3. Where is it kept?4. When was it bought?5. When was it damaged?6. How many strings were broken?7. How did my father feel about this?8. What aren’ t we allowed to do?9. What is being done to the clavichord?B. change the form of the phrases in italics. Do not refer to the passage until you finish the exercise: We call it a clavichord.__________________________________________Someone made it in Germany in1681.__________________________________________ We keep our clavichord in the living room. __________________________________________ My grandfather bought the instrument many years ago. ___________________________________ Recently a visitor damaged it. __________________________________________She struck the keys too hard and broke two of the strings._________________________________ This shocked my father.__________________________________________Now he does not allow us to touch it.__________________________________________ A friend of my father’ s is repairing it. __________________________________________ Language points:A. be made inIt was made in Germany.be made ofThe tea pot is made of silver.be made fromBread is made from flour.be made byThis cake was made by my sister.Supply the correct words:1. Is your watch made ______ gold?2. These knives were made ______ Sheffield.3. This cake was made ______ sugar, flour, butter and eggs.4. The model plane was made ______ a group of students.B. a friend of my father’ s 双重所有格He is one of my father’ s friends. He is a friend of my father’ sTom lent me one of his books. Tom lent me a book of his.He is one of my friends. He is a friend _______ ________.Change the form of the phrases in italics:1. He borrowed one of my records. ____________________________________2. She showed me one of John’ s pictures.____________________________________3. It was one of her ideas. ____________________________________4. One of you letters was found on my desk.____________________________________5. Some of their friends came to see me.____________________________________Exercises:A . Rewrite the sentences and change the active voice into passive voice:1. These workmen are repairing my house.2. The police picked up the boy in the forest.3. The boy sends the newspaper to me every morning.4. They will take care of your grandmother.5. Mary wrote three books last year.6. She is washing your clothes.7. They are painting the wall.8. I am telling him how to be a good student.B. Translating:1. 这幢楼叫做“联谊大厦” (Union building。

练习题10及参考答案1. 单项选择题（1）在声明一个结构体类型时系统分配给它的存储空间是。

A. 该结构体类型中第一个成员所需存储空间B. 该结构体类型中最后一个成员所需存储空间C. 该结构体类型中所有成员所需存储空间的总和D. 结构体类型本身并不占用存储空间，即系统并不给结构体类型分配存储空间【答】D（2）下列说法不正确的是。

A. 下列结构体声明时，占据了5个字节的空间struct stru{short int a;short int b;char c;}B. 结构体类型的成员名可以与程序中的变量名相同C. 结构体类型的成员可以是一个结构体变量D. 可以单独使用结构体变量中的成员，它的作用相当于普通变量【答】声明结构体类型时不占据内存空间。

本题答案为A。

（3）在定义一个结构体变量时系统分配给它的存储空间是。

A. 该结构体变量中第一个成员所需存储空间B. 该结构体变量中最后一个成员所需存储空间C. 该结构体变量中占用最大存储空间的成员所需存储空间D. 该结构体变量中所有成员所需存储空间的总和【答】D（4）下列说法正确的是。

A. 结构体类型的每个成员的数据类型必须是基本类型B. 结构体类型的每个成员的数据类型都相同，这一点与数组一样C. 在声明结构体类型时，其成员的数据类型不能是结构体本身D. 以上说法都不对【答】D（5）在定义一个共用体变量时系统分配给它的存储空间是。

A. 该共用体变量中第一个成员所需存储空间B. 该共用体变量中最后一个成员所需存储空间C. 该共用体变量中占用最大存储空间的成员所需存储空间D. 该共用体变量中所有成员所需存储空间的总和【答】C（6）以下关于枚举的叙述不正确的是。

A. 枚举变量只能取对应枚举类型的枚举元素表中元素B. 可以在定义枚举类型时对枚举元素进行初始化C. 枚举元素表中的元素有先后次序，可以进行比较D. 枚举元素的值可以是整数或字符串【答】D（7）以下关于typedef的叙述不正确的是。

并列连词专项练习1. We got so wet. We had ______ umbrellas ______raincoats with us!A. either; orB. both; andC. neither; norD. not only; but also【答案】C【详解】句意：我们都湿透了。

我们既没有雨伞也没有雨衣！考查连词。

either...or或者……或者……；both...and 两者都；neither...nor既不……也不……；not only...but also不但……而且……；根据“We got so wet.”可知，说明既没有雨伞也没有雨衣，表达的是两者都不，应用neither...nor，故选C。

2. Read the book Cute Pets, ______ you will know how to take care of your cat.A. orB. soC. andD. but【答案】C【详解】句意：阅读《可爱的宠物》这本书，你会知道如何照顾你的猫。

考查连词辨析。

or或者；so所以；and和；but但是。

“Read the book Cute Pets”与“you will know how to take care of your cat”是并列关系，用连词and连接，故选C。

3. He never smokes ______ drops litter in public.A. andB. orC. butD. so【答案】C【详解】句意：他从不抽烟，只在公共场合乱扔垃圾。

考查并列连词辨析。

and和；or或者；but但是；so 因此；根据语境及前面的“never”可知，此处是not...but...的用法，表示“不是……而是……”，故选C。

4. ______ Tom ______ Tim is going with you because one of them must stay at home.A. Either; orB. Neither; norC. Both; andD. Not only; but also【答案】A【详解】句意：不是汤姆就是蒂姆和你一起去，因为他们中必须有一个待在家里。

第一章一、填空题1．冯·诺依曼结构的特点是。

2．主机由CPU和主存储器组成。

3．现在主要采用结构作为微/小型计算机硬件之间的连接方式。

4．计算机系统由系统和系统构成。

5．计算机系统的层次结构中，位于硬件之外的所有层次统称为。

二、选择题1．冯·诺依曼计算机结构的核心思想是。

A. 二进制运算B. 有存储信息的功能C. 运算速度快D. 存储程序控制2．电子计算机可分为数字计算机、模拟计算机和数模混合计算机，它是按照。

A. 计算机的用途分类B. 计算机的使用方式分类C. 信息的形式和处理方式分类D. 计算机的系统规模分类3．完整的计算机系统应包括。

A. 运算器、存储器、控制器B. 外部设备和主机C. 主机和实用程序D. 配套的硬件设备和软件系统4．中央处理器（CPU）是指。

A. 运算器B. 控制器C. 运算器和控制器D. 运算器和存储器5．计算机的存储器系统是指。

A. RAMB. ROMC. 主存储器D. cache、主存储器和辅助存储器6．目前人们所说的个人计算机属于。

A. 巨型机B. 中型机C. 小型机D. 微型机7．微型计算机的发展以技术为标志。

A. 操作系统B. 微处理器C. 磁盘D. 软件8．系统总线中，划分数据线、地址线和控制线的根据是。

A. 总线所处的位置B. 总线的传输方向C. 总线的传输内容D. 总线的控制方式9．系统总线中地址线的作用是。

A.用于选择主存单元B.用于选择进行信息传输的设备C.用于指定主存单元和I/O设备接口电路的地址D.用于传送主存物理地址和逻辑地址10．挂接在总线上的多个部件。

A.只能分时向总线发送数据，并只能分时从总线接收数据B.只能分时向总线发送数据，但可同时从总线接收数据C.可同时向总线发送数据，并同时从总线接收数据D.可同时向总线发送数据，但只能分时从总线接收数据11．对计算机的软硬件资源进行管理，是的功能。

A. 操作系统B. 数据库管理系统C. 语言处理程序D. 用户程序12．以下软件中，是计算机系统软件。