高一英语暑假阅读天天练 第八天
2019-2020年高一英语暑假阅读天天练 第四天

2019-2020年高一英语暑假阅读天天练第四天Read the following time table and then answer the following question.Train Time Tablelv. (Leave) Boston Ar. (Arrive) Midway Ar. New York5:10 AM EX.(Except)Sun. 7:00 AM 10:45 AM7:10 AM Daily 9:00 AM 12:45 PM9:10 AM Ex. Sat. & Sun. 11:00 AM 2:45 PM10:00 AM Ex. Hol.(Holiday) 11:45 AM …1:15 PM Daily 3:15 PM 5:45 PM3:40 PM Ex. Hol. 5:40 PM 8:15 PM5:20 PM Daily 7:20 PM 9:55 PM1. What is the shortest time between Boston and New York by train?A. 5 hours 35 minutesB. 5 hours 5 minutesC. 4 hours 30 minutesD. 4 hours 25 minutes2. How many trains have to spend over five hours on the way from Boston to New York?A. 5B. 3C. 7D. 23. On Christmas Day, how many trains at least can you take from Boston to New York?A. 2B. 4C. 5D. 3BCan you remember any of the bad habits you used to have when you were very young? Perhaps, as a baby, you used to suck your thumb(拇指). Of course, you do not do that any more, but you can surely remember your mother’s efforts to train you. The good habits you now have in such matters as personal cleanliness were part of this early training.We may not suck our thumbs any more, but as we get older we get other bad habits. We can’t give them up easily, either.(Anyone who has tried to give up smoking knows this very well!) Each period brings its own problems. In babyhood, it’s thumb-sucking; in childhood, it’s nail-biting; in our teens, it’s smoking; in middle-age, it’s over-eating, and so on. And if anyone tells you that he has no bad habits, you can be sure that he must have the worst habit of all.1. Generally speaking, a child likes ______.A. sucking thumbsB. biting nailsC. smokingD. eating too much2. According to the passage, now we have good habits such as personal cleanliness, forwhich we benefit from _______.A. the social conditionsB. some strict rulesC. our friends’ kind helpD. our mothers’ early training3. At the end of the story the writer says "And if anyone tells you that he has no bad habits, you can be sure that he must have the worst habit of all". Here what do you suppose the worst habit is?A. Reading.B. Playing.C. Walking.D. Lying.4. Which of the following is NOT true to the passage?A. It is very difficult to get rid of our habits.B. At different ages people have different bad habits.C. Giving up smoking is as difficult as giving up other bad habits.D. Sucking thumbs is a young child’s bad habit.。
高一英语暑假阅读天天练:第六天

我的暑假第六天:One silly question I simply can’t stand is “How do you feel?” Usually the question is asked of a man in action—a man on the go, walking along the streets, or busily working at his desk. So what do you expect him to say?He’ll probably say,“Fine,I'm all right,” but you have put a bug(小虫子)in his ear—maybe now he’s not sure。
If you are a good friend, you may have seen something in his face, or his walk,that he overlooked(忽略) that morning. It starts worrying him a little。
First thing you know,he looks in a mirror to see if everything is all right,while you go merrily on your way asking someone else “How do you feel?” Every question has its time and place. It’s perfectly acceptable,for instance, to ask “How do you feel?" if you’re visiting a close friend in the hospital。
But if the fellow is walking on both legs,hurrying to take a train,or sitting at his desk working,it’s silly to ask him that silly question。
高一英语短文阅读天天练8

高一名校短文阅读天天练(八)AThe hand, the eyes and the brain work together to make human beings different from other animals. No other animals have all three parts to work together. No animals can do what human beings can do. Humans can do many things and feel many things with the hand. The hand can hold onto things and make things because the thumb works with the fingers. This fifth finger is strong. Most animals don’t have thumbs. The thumb can press against the other fingers. Without a thumb to press against the fingers, it is difficult to hold onto anything. The thumb and fingers can also fit the flat surface of a box and the curved (不平的) surface of a pencil. We can feel that something is hot or cold, soft or hard, smooth or rough. The hand, with thumb and fingers, is one of the best tools we have. Most animals see a flat picture. Their eyes can only see how high and how wide something is. Some animals see a different picture with each eye. Some don’t see in colour. Humans see one picture with both eyes working together. We can see how high and how wide something is. We can also see how far in front of or in back of something a thing is. The brain tells other parts of the body how to work. Some of the things the body does are automatic;that is, we don’t have to think about them. For example, we don’t have to think to make our heart eat or our stomach work. The brain tells the eyes and hands how to make useful and beautiful things. That is how human beings become tool makers and artists. That is how human can have richer and better lives than other animals.36. Human beings are different from other animals because ___________.A. human beings have the hands, the eyes, and the brain working all the timeB. other animals also have hands, the eyes, and the brainC. human beings work together with other animalsD. the hands, the eyes, and the brain of the human can work together37. According to the passage, when you say you hold onto something, you mean___________.A. you have it in your hand and keep it there by putting your fingersfirmly round itB. you have it in your arms and keep it there by putting your fingersfirmly round itC. you feel it with your handsD. you press the fingers of your right hand against those of your left hand38. The author tells us that no animals can do what humans can do. Hegives quite a few facts to support the idea. One of them is that ___________.A. most animals don’t see in colourB. the humans see a thing with both eyes working togetherC. only humans can see and how high and how wide a thing isD. some animals can see only one picture39. ___________ is automatic.A. BreathingB. Driving a carC. Making a chairD.Playing footballBThe old shoes had brought him so much trouble that Johnnydecided to throw them away. He went to the rubbish pit (垃圾坑)outside the city and threw the old shoes into the pit. "Now they can bring me no more trouble," he said. He returned home, lay down in his bed and slept. But he had a dog, and the dog was used to going to the rubbish pit to look for food, because Johnny never bought food for his dog. The dog, who loved its master (主人) even though it was not given food, saw the shoes in the pit and knew they were its master's. So the dog took one of the heavy shoes in its mouth and went slowly back with it, and left it at its master's bedside. Then the dog fetched the other shoe in the same way. When Johnny woke up, he saw the shoes by his bed and he was afraid. "There, shoes can walk by themselves, they must be done away with." he thought. Then he made a large fire in front of his house and put the shoes on it. Just then a strong wind was blowing and before long the fire made the house begin burning. His neighbours immediately came but could do nothing. The house burnt down but the old shoes were saved by the dog again.40. The dog loved Johnny only because he _______ .A. bought food for itB. was its masterC. even gave food to itD. loved it too41. The dog took back _______ .A. one of the heavy shoesB. neither of the two shoesC. the pair of shoesD. the second shoe in another way42. When Johnny saw the shoes again after the fire, he would be _______ .A. very happyB. pleasedC. wild with joyD. very sadCDuring the summer holidays there will be a revised (修改过的)schedule (时刻表) of services for the students. Changes for dining room and library service hours and for bus schedules will be posted on the wall outside the dining-hall. Weekly film and concert schedules, which are being arranged (安排), will be posted each Wednesday outside the student club.In the summer holidays, buses going to the town center will leave the main hall every hour on the half hour during the day. The dining-room will serve three meals a day from 7:00a.m. to 7:00p.m. during the week and two meals from noon to 7:00p.m.at weekends. The library will continue its usual hours during the week, but have shorter hours on Saturday and Sunday. The weekend hours are from noon to 5:00p.m..All students who want to use the library must have a new summer card. This notice will also appear in the next week's student newspaper.43. The main purpose of this notice is to________ .A.tell students of important schedule changesB.tell students of new bus and library servicesC.show the excellent services for studentsD.ask students to renew their library cards44. In the summer holidays, the library will have ________ .A.no special hoursB.special hours on weekdaysC.special hours on weekendsD.special hours both on weekdays and weekends45. The notice is probably given by________ .A. the libraryB. the bus companyC. Students' UnionD. the dining hallDVisitors to Britain are sometimes surprised to learn that newspapers there have such a large circulation (发行). The “Daily Mirror ” and the “Daily express” both sell about four million copies everyday. British families generally buy a newspaper every morning and two or three on Sundays.Besides the national papers, there is , however, another branch of the British press which sells almost as many copies. Local newspapers have a weekly circulation of 13 million. Almost every town and county area has one. Nearly all them hold their own financially (财政)and many of them are very profitable (赚钱的).These papers are written almost entirely for readers interested in local events-births, weddings, deaths, council (地方会议) meetings and sports. Editors prefer to rely on people who know the district well. A great deal of local news is regularly supplied by clubs and churches in the neighborhood and it does not get out to date as quickly as national news.The editors must never forget that the success of any newspaper depends on advertising (广告). He is usually anxious to keep the good will of local businessmen for this reason. But if the newspaper is well written and the news items have been carefully chosen to draw local readers, the business men are grateful for the opportunity (机会) to keep their products in the public eyes.46.Visitors to Britain are surprised to learn that .A.there are so many local newspapers thereB.local papers should have a circulation of four millionC.the “Daily Mirror ” and “Daily Express” sell as many as 4 million copies every dayD.British newspapers are so widely read47.Local newspapers have .A.a circulation as large as that of national newspapersB.a daily circulation of 13 millionC.a slightly smaller circulationD.an even larger circulation48.In the writer’s opinion, no paper can possibly succeed without .A.advertisements B.interesting reportsC.a great deal of national news D.an excellent sales manager 49.Which of the following is true?A.All the local newspapers are very profitableB.Local newspapers have a weekly circulation of 14 millionC.Local readers are much interested in local newsD.Each British family buys three newspapers on Sundays 50.The word “draw ” in the last paragraph may mean .A.to pull B.to cause to notice C.to cause to comeD.to receive参考答案:36-40 DABA B 41-45 CDACC 46-50 DCACB。
2019-2020年高一英语暑假阅读天天练 第二天

2019-2020年高一英语暑假阅读天天练第二天AMost people around the world are right-handed. This also seems to be true in history. In 1799, scientists studied works of art made at different times from 1,500 B.C. to the 1950s. Most of the people shown in these works are right-handed, so the scientists guessed that right-handedness has always been mon through history. Today, only about 10% to 15% of the world’s population is left-handed.Why are there more right-handed people than left-handed ones? Scientists now know that a person’s two hands each have their own jobs. For most people, the hand is used to find things or hold things. The right hand is used to work with things. This is because of the different work of the two sides of the brain. The right side of the brain, which makes a person’s hands and eyes work together, controls the left hand. The left-side of the brain, which controls the right hand, is the centre for thinking and doing problems. These findings show that more artists should be left-handed, and studies have found that left-handedness is twice as mon among artists as among people in other jobs.No one really knows what makes a person bee right-handed instead of left-handed. Scientists have found that almost 40% of the people bee left-handed because their main brain is damaged when they are born. However, this doesn’t happen to everyone, so scientists guess there must be another reason why people bee left-handed. One idea is that people usually get right-handed from their parents. If a person does not receive the gene(基因) for right-handedness, he / she may bee either right-handed or left-handed according to the chance and the people they work or live with.Though right-handedness is more mon than left-handedness, people no longer think left-handed people are strange or unusual. A long time ago, left-handed children were made to use their right hands like other children, but today they don’t have to.1. After studying works of art made at different times in history, the scientists found _______.A. the art began from 1,500B.C.B. the works of art ended in the 1950sC. most people shown in the works of art are right-handed1 / 2D. most people shown in the works of art are left-handed2. How many people in the world are left-handed now?A. Less than one sixth.B. More than a half.C. About 40%.D. The passage doesn’t tell us.3. What is the hand for most people used to do?A. It’s used to find or hold things.B. It’s used to work with things.C. It’s used to make a person’s eyes work to gether.D. It’s the centre for thinking and doing problems.4. According to the passage, which of the following is NOT true?A. No one really knows what makes a person bee right-handed.B. Left-handedness is cleverer than right-handedness.C. Today children are not made to use their right hands only.D. Scientists think there must be some reason why people bee left-handed.5. The best title for this passage is _______.A. Scientists’ New InventionsB. Left-handed PeopleC. Which HandD. Different Brains, Different Hands温馨提示:最好仔细阅读后才下载使用,万分感谢!。
最新-高一英语暑假阅读天天练 第四天 精品

我的暑假第四天:.ARead the following time table and then answer the following question.Train Time Tablelv. (Leave) Boston Ar. (Arrive) Midway Ar. New York5:10 AM EX.(Except)Sun. 7:00 AM 10:45 AM7:10 AM Daily 9:00 AM 12:45 PM9:10 AM Ex. Sat. & Sun. 11:00 AM 2:45 PM10:00 AM Ex. Hol.(Holiday) 11:45 AM …1:15 PM Daily 3:15 PM 5:45 PM3:40 PM Ex. Hol. 5:40 PM 8:15 PM5:20 PM Daily 7:20 PM 9:55 PM1. What is the shortest time between Boston and New York by train?A. 5 hours 35 minutesB. 5 hours 5 minutesC. 4 hours 30 minutesD. 4 hours 25 minutes2. How many trains have to spend over five hours on the way from Boston to New York?A. 5B. 3C. 7D. 23. On Christmas Day, how many trains at least can you take from Boston to New York?A. 2B. 4C. 5D. 3BCan you remember any of the bad habits you used to have when you were very young? Perhaps, as a baby, you used to suck your thumb(拇指). Of course, you do not do that any more, but you can surely remember your mother’s efforts to train you. The good habits you now have in such matters as personal cleanliness were part of this early training.We may not suck our thumbs any more, but as we get older we get other bad habits. We can’t give them up easily, either.(Anyone who has tried to give up smoking knows this very well!) Each period brings its own problems. In babyhood, it’s thumb-sucking; in childhood, it’s nail-biting; in our teens, it’s smoking; in middle-age, it’s over-eating, and so on. And if anyone tells you that he has no bad habits, you can be sure that he must have the worst habit of all.1. Generally speaking, a child likes ______.A. sucking thumbsB. biting nailsC. smokingD. eating too much2. According to the passage, now we have good habits such as personal cleanliness, for which we benefit from _______.A. the social conditionsB. some strict rulesC. our friends’ kind helpD. our mothers’ early training3. At the end of the story the writer says "And if anyone tells you that he has no bad habits, you can be sure that he must have the worst habit of all". Here what do you suppose the worst habit is?A. Reading.B. Playing.C. Walking.D. Lying.4. Which of the following is NOT true to the passage?A. It is very difficult to get rid of our habits.B. At different ages people have different bad habits.C. Giving up smoking is as difficult as giving up other bad habits.D. Sucking thumbs is a young child’s bad habit.。
高一英语暑假阅读天天练写作篇

高一英语暑期作业:写作篇Hi, Grown-up,As a student of your age, I understand your situation. The problem you arefacing is common among our teenagers. However, it should be wise not to doanything that may hurt her feelings. Here are a few suggestions.First, it's advisable to talk more with your mom.Heart to heart talks helpyou understand each other better. They are also opportunities to let her know your ideas of and attitudes toward many things.Second, you should learn to do your own things well, proving to your momthat you are already a "Grown-up'. It's even better if you could share more ofthe housework, such as cleaning, washing and cooking.模仿以上范文,达成以下写作(1)假定你是李华,你的好朋友和父亲母亲亲吵嘴了,由于他感觉父亲母亲亲老是对他管教太严,不给他自由,请你给他写一封E-Mail ,提出解决问题的详细方法。
字数许多于80.Dear,Yours,Li HuaDear Sir or Madam,I am Li Hua from class One, Senior Two. I get the news that our schoolwill select some students to coach the students of Chenxi Hope School during this summer vacation. I have set my heart on the program after hearing thenews because this activity can be beneficial to meto experience the pleasure of helping others. What's more, I possess some advantages over this job,such as great independence, strong character and fluent and excellent English.If I am lucky enough to be one of the coaches, I think I can be fit forthe post and I plan to devote my energy and time to it. Please give mean opportunity!Yours sincerely,Li Hua模仿以上范文,达成以下写作(2)学校要要选拔一批广播员,你存心参加,请给校评比组写一封申请信。
高一英语暑假阅读天天练:第八天.pdf

小专题(七) 测电功率 测电功率和测电阻两个实验较为相似,中考对这两类试题的考查点亦很相似.需要特别注意的是,两个实验的原理不同、多次测量的目的不同. (2014·滨州)实验室有一小灯泡,上面只标有“2.5 V”的字样,小滨为了测定其额定功率,从实验室找来了如下器材:电压表(0~3 V和0~15 V两个量程);电流表(0~0.6 A和0~3 A两个量程);滑动变阻器(20 Ω1A);电源(电压恒为6 V);开关;导线若干. (1)根据如图1小滨的实验电路图,请你用笔画线代替导线,将图2实物图补充完整; (2)小滨连接完电路后,闭合开关,发现小灯泡微微发光,移动滑片,小灯泡亮度都不改变,请帮助小滨分析原因:____________________________; (3)解决上述问题后,小滨又发现他选用的电压表量程0~3 V档已损坏,而另一量程档及其他器材都完好.为了测定小灯泡的额定功率,他想出了一个解决办法:用另一量程档和阻值为6 Ω的定值电阻R0,按如图3(甲)所示的电路进行测量,闭合开关,调节滑动变阻器使小灯泡正常发光,这时,电压表、电流表的示数如图3(乙)、(丙)所示,电压表示数为______V,电流表示数为_____A,由此可以推断小灯泡的实际电压为____V,小灯泡的额定功率为_____W. 点拨:问题(2):滑动变阻器不能改变灯泡的亮度,说明其无法改变自身接入电路中的电阻,连入的可能是两个下接线柱或两个上接线柱;而灯泡亮度很暗,说明滑动变阻器连入电路中的电阻较大.问题(3):由图示电表读出其示数,然后应用串联电路特点与欧姆定律求出灯泡电压,然后由P=UI求出灯泡额定功率. 1.(2014·盐城)小华做测量小灯泡电功率的实验,所用小灯泡额定电压为2.5 V. (1)实验中所用电压表在未接入电路时表盘如图甲所示,在使用它测量前首先应进行的操作是_______________________. (2)小华连接的电路如图乙所示,其中有一根导线连接不规范,导致开关没有闭合时_____表就有读数,请在这根导线上打“×”,并用笔画线代替导线,将其改正. (3)实验中测出小灯泡在U=2.0 V时的功率后,要测量其额定功率,应向______(填“左”或“右”)移动滑动变阻器的滑片.当电压表示数达到额定电压时,电流表示数如图丙所示,其值为______A,则小灯泡的额定功率_______W. (4)测量结束后,应断开开关,先拆除_______两端的导线,再拆除其他导线. 2.(2014·巴中)在“测量小灯泡电功率”的实验中,电源电压为3 V,小灯泡额定电压为2.5 V,小灯泡电阻约为10 Ω. (1)请你用笔画线代替导线,将图甲中的实验电路连接完善(要求滑片向左移动时灯泡变暗). (2)小明同学连接好最后一根导线后,闭合开关,他发现无论怎样移动滑片,灯泡都很暗,且两表示数不变,出现上述故障的原因可能是:①________________;②_______________. (3)故障排除后,小明同学闭合开关,移动滑动变阻器的滑片到某点,电压表的示数如图乙所示,为_____V.若他想测量小灯泡的额定功率,应将图甲中的滑片向____(填“左”或“右”)端移动,使电压表示数为2.5 V. (4)他又移动滑片,记下了几组对应的电压表和电流表的示数,并绘制成图丙所示的IU图像,根据图像信息可以计算出小灯泡的额定功率是_________W. (5)他利用已测出的几组数据求出了小灯泡的电阻,发现小灯泡的电阻值是变化的,产生这一现象的原因是________________. (6)在该试验后把小灯泡换成一个定值电阻,还可探究___(填“A”或“B”)的关系. A.电流与电阻 B.电流与电压 3.(2014·重庆)某校两个实验小组在测定小灯泡电功率的实验中,被测小灯泡的额定电压为2.5 V.实验桌上提供有如下器材:电源(电压6 V且恒定不变)、电流表、电压表、开关、滑动变阻器(50 Ω 1 A)各一只,导线若干. (1)晓丽同学所在实验小组按照如图甲所示的电路进行实验. ①用笔画线代替导线,将如图甲所示的实物电路连接完整. ②连接电路时,开关应该___________. ③闭合开关,移动变阻器的滑片P的过程中,观察到电流表示数几乎接近最大值时,小灯泡仍然不亮,且电压表无示数,其原因可能是_______________. ④排除故障后,闭合开关,移动滑片P至电压表的示数如图乙所示,其读数为V.要使小灯泡正常发光,滑片P应向_______(填“A”或“B”)端移动. ⑤多次改变滑片P的位置,获得多组对应的电压、电流值,并绘制出如图丙所示的图像.由图像,小灯泡的额定功率是_____________W. (2)晓丽同学所在的实验小组的滑动变阻器已损坏(其他器材和规格不变),老师提供了另一只滑动变阻器(10Ω 1 A),小组同学讨论后发现,若要继续用已连接完整的图甲所示电路来测出小灯泡的额定电功率.至少还要在原电路中___(填“串”或“并”)联一个____Ω的电阻. 4.(2014·烟台)为测量一只标有“6 V 0.3 A”小灯泡的额定功率,实验室备有:电压表(量程0~3 V、0~15 V)一个,电流表(量程0~0.6 A、0~3 A)一个,“10 Ω 2 A”和“50 Ω 1 A”的滑动变阻器各一只,电源(电压为12 V)一个,开关一只,导线若干,小组同学通过讨论、交流,设计了如图甲所示的实验电路图,在根据实验电流图选用实验器材连接实物电路时,同组的三位同学产生了分歧. 甲同学:电压表选用大量程,电流表选用小量程,滑动变阻器选用“10 Ω 2 A”的. 乙同学:电压表选用大量程,电流表选用小量程,滑动变阻器选用“50 Ω 1 A”的. 丙同学:电压表、电流表都选用小量程,滑动变阻器选用“50 Ω1 A”的. (1)你认为哪位同学的观点是合理的?请以笔画线代替导线,将图乙中的实物连接起来. (2)请你对其他两位同学的观点进行评估. 5.(2014·梅州)如图甲所示.在测定小灯泡电功率的实验中,选用的电源电压为4.5 V.小灯泡的额定电压为2.5 V. (1)连接电路时开关_______. (2)闭合开关,移动滑动变阻器的滑片P,发现小灯泡始终不亮,电压表、电流表均无示数,原因可能是下列中的哪一种:____(只填选项). A.灯泡断路 B.电压表短接 C.灯泡短接 D.滑动变阻器断路 (3)排除故障后,闭合开关,移动滑片P至某一位置时.电压表的示数如图乙所示,其读数为______V;要获得小灯泡额定功率的数据,滑片P应向______(填“A”或“B”)端移动. (4)改变滑片P的位置,获得如表所示的多组对应的电压、电流值.由表格可知,灯泡的额定功率是________W. 实验序号电压表示数/V电压表示数/V11.50.1522.50.2033.00.226.(2014·武汉)图甲是测量小灯泡电功率的电路.小灯泡的额定电压为2.5 V. (1)请根据图甲将图乙中的实物电路连接完整(导线不允许交叉). (2)闭合开关前,将滑动变阻器的滑片移到阻值最大处.闭合开关后发现小灯泡不亮,电压表示数为零,电流表指针偏转.逐渐向右移动滑片,小灯泡始终不亮,电压表示数仍然为零,电流表示数逐渐变大.该电路故障可能是_________________. (3)排除故障后正确操作实验,测量数据如下表所示: 实验次数12345678发光情况明亮亮更明亮较亮较暗微光熄灭熄灭电压U/V2.52.13.01.71.30.90.50.1电流I/A0.280.260.300.240.210.190.160.05分析实验数据可知: ①小灯泡的额定功率为____W. ②7、8两次实验中,灯泡熄灭的原因是.___________________________________ ③小灯泡在断电一段时间后的电阻可能是____(填“0 Ω”“1 Ω”“2 Ω”或“8.9 Ω”). (2014·荆州)某物理兴趣小组在测量小灯泡电功率的实验中,设计的电路图如图所示.电源电压保持不变,闭合开关S后,电路正常工作,过了一会,灯L突然熄灭,两个电表中只有一个电表示数变大,则: (1)若电压表示数变大,电路故障__________;若电流表示数变大,电路故障是__________. (2)排除故障后继续实验,老师告诉同学们,电压表的电阻虽然较大,但还是有部分电流通过电压表,则通过实验测得数据计算出来的电功率_______(填“大于”“等于”或“小于”)小灯泡的实际功率. 8.(2014·苏州)在“测量小灯泡的额定功率”实验中,已连接的部分电路如图a所示,图中电源电压为6 V且恒定,小灯泡上只能看到“3.8 V”字样. (1)请你用笔画线代替导线,将图中的实物电路连接完整. (2)正确连接实验电路后,开关试触时,发现灯泡不亮,电流表无示数,电压表有示数,其故障原因可能是__________________. (3)故障排除后开始实验,当变阻器滑片滑到图示位置时,电压表的示数为3.0 V,接着应将滑片向_______滑动,直至灯泡两端电压为额定电压,此时电流表的示数如图b所示.则灯泡的额定功率为_________W. (4)实验时某小组学生发现电流表损坏,他们想设计一个不用电流表测定该小灯泡额定功率的实验,于是向老师要了一个R0的定值电阻(阻值适当)和一个单刀双掷开关符号为(),借助原有的实验器材,顺利完成了实验,假如由你来做实验,要求电路只连接一次,请设计实验方案. ①在虚线框内画出实验电路图. ②简述实验步骤. ③写出灯泡额定功率的表达式. 小专题(七)测电功率 归类例析 例(1) (2)滑动变阻器同时接下面两个接线柱 (3)5.5 0.5 2.5 1.25 专题精练 (1)将指针调零(2)电压 (3)右 0.26 0.65 (4)电源 2.(1) (2)① 电源电压太小 ② 滑动变阻器同时接下面两个接线柱 (3)2 右 (4)0.75 (5)灯泡电阻受温度影响,随温度的升高而增大 (6)B 3.(1)① ② 断开 ③ 灯泡短路 ④1.1A ⑤0.5 (2)串 7.5 4.(1)乙同学的观点是合理的;电路图的连接如图所示: (2)甲同学:滑动变阻器阻值过小,小灯泡的实际电压总是超过额定电压,因此小灯泡可能烧坏; 丙同学:选择的电压表量程过小,无法指示小灯泡的额定电压,电压表可能损坏. 5.(1)断开(2)D(3)2.2 B(4)0.5 6.(1) (2)小灯泡短路(3)①0.7②实际功率太小 ③1 Ω 7.(1)灯泡断路 灯泡短路 (2)大于 8.(1) (2)灯泡断路(3)右1.52 (4)① ②a.根据电路图连接电路,闭合开关S1、S2接1,调节滑动变阻器,使电压表示数为3.8 V. b.保持滑动变阻器滑片位置不变,S2接2,读出电压表示数U.(用相应的字母表示测出的物理量) ③P额=3.8 V×(U-3.8 V)/R0. 初中学习网,资料共分享!我们负责传递知识!。
高一英语暑假阅读天天练 第十天

我的暑假第十天:When you are travelling, whether on business or for pleasure, you often need to stay in a hotel. The kind of hotel you choose probably is decided above all according to how much money you want to spend. There are small hotels with very few services, where the prices are low, or there are large hotels with all the very latest comforts, where you could spend all the money you have in the bank for one very comfortable night.There are several different kinds of people who go to hotels. Some want to live, rather than just stay, in a hotel; the hotels which are designed to meet their needs are called residential hotels. However, most people who stay in hotels are either business people or tourists on holiday.In most hotels, there are two kinds of rooms: single rooms, for the use of one person, and double rooms, for the use of two people. In addition, in large hotels, there are also suites(套房), which include two or more rooms connected together—perhaps a bed-room and a living room. They are for people who are very rich or very important.1. One’s choice of a particular hotel is made mainly according to _______.A. how much one is willing to pay for a nightB. whether one is travelling on business or for pleasureC. whether the hotel is in the central part of a cityD. how good the services of the hotel are2. If the president of a certain country comes, he will _______.A. live in a new hotel with a suiteB. stay in a single room of a hotelC. stay in a double room of a hotelD. stay in a suite of a modern hotel3. If a person stays in a modern hotel with latest comforts for a night, _______.A. he will become poorB. he has to pay a lot of moneyC. he has to spend all the money he has in the bankD. he has to pay some money4. The title of the article is probably _______.A. Rooms of a HotelB. Cost of a HotelC. HotelsD. People staying in Hotels(24)218 Chestnut StreetPhiladelphia, PA 28774May 7th, 2002Social Security Administration2119 Main StreetPhiladelphia, PA 28000Dear Social Security,I am applying for a new Social Security Card.I lost my old one last week, I was walking home from the subway station, and I pulled a tissue(纸巾)out of my pocket and lost my wallet at the same time. My card was in my wallet.Please send me a new card. If you can get the card to me within two weeks, please sent it to the address at the top of the page. If it will take longer than this, then you will have to send it to my new address. I am moving on May 23rd to 103 Walnut Street, Philadelphia, PA 28445 If you can send my new card within two weeks, I would be very pleased. I am applying for a new job at Ventura Savings Bank, and I know they will want to have my Social Security Number. Unfortunately I have forgotten it, so I will need my card to find out. On my old card I was called Victoria Matthews. Since then I have gotten married. Please issue my new card in my married name: Victoria Villata. In case you need more information about me to hunt down my old number, my date of birth was September 11, 1985. Thank you very much.SincerelyVictoria Villata1. Why does Mrs. Villata need a new Social Security Card?A. She is moving.B. She lost the old one.C. She has just gotten married.D. She doesn’t remember her Social Security Number.2. Why does Mrs. Villata give the Social Security Administration her date of birth?A. She wants them to know old she is.B. She is afraid they may have lost her Social security Card.C. She thinks it will help them track down her Social Security Number.D. She thinks that the older she is, the more social Security she will get.3. Which part of Victoria Villata’s letter is LEAST important to the Social Security administration?A. The fact that she has changed her name.B. The fact that her card should be send to a new address.C. The fact that she needs a replacement of Social Security Card.D. The fact that she lost her wallet while pulling a tissue our of her pocket.。
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我的暑假第八天:
Many Japanese never take their vacations they should enjoy, but with the coming of “Golden Week”, a series(系列) of holidays following one after another in late April and early May, they pour out of the country by tens of thousands. The most popular place they go to is Hawaii, but Hong Kong, Singapore, South Korea and Taiwan are also favoured. The typical Japanese abroad, as it is reported, travel for about a week and spends, as average, $2, 800 on airline tickets, hotels and gifts for friends and relatives. It may seem high, but it’s cheap for the Japanese, who would have to spend a lot more if they spend a week touring (making a journey) their own country.
1. Many Japanese _______.
A. don’t enjoy taking vacations
B. enjoy touring in Golden Week
C. d on’t have vacations
D. enjoy staying at home
2. The period in late April and early May is called Golden Week because _______.
A. the week is made of gold days
B. it is warm for people to tour
C. holidays come one after another in this period
D. it is still spring then
3. Which of the following is true?
A. The Japanese never enjoy travelling more than one week.
B. The Japanese like best to travel to some part in the U. S. by air.
C. Travelling at home cost less than abroad for the Japanese.
D. Hawaii is the most beautiful place to visit in Asia.
4. Which is the best title for the passage?
A. Vacations for the Japanese
B. Costs of Travelling in Japan
C. Places the Japanese Enjoy Travelling to
D. Japanese in Golden Week
(18)
Last week the manager of an old jeweler’s shop received a letter marked “personal”, so of course his secretary gave it to him unopened. As he was very busy, the letter lay on his desk till tea-time. Then he opened it and a £10 note fell out onto his desk. With the note was a short letter. This is what it said:
Dear sir,
In 1935 I got engaged. But unfortunately at that time there was a lot of unemployment and I lost my job. I was six months without a job and then I got work again. But of course was very short of money. I came to your shop to buy a wedding ring. The assistant brought some rings for me to look at, but she was called away for a moment, and I put one of the rings in my pocket. When she came back, I said I did not know the size of my girl-friend’s finger. So I left the shop without buying a ring.
My wife died a short while ago and the fact that I never paid for her ring has been on my conscience (良心) all these years. At the time the ring cost £2 so I reckon (估计) that is about £10 at today’s price. And I am sending you that amount.
Yours truly,
A customer
“Well, well, well,” said the manager, “life is full of surprises!”
1. The best headline for this article would be _______.
A. A Customer Pays His Bill
B. An Old Jeweler’s Shop
C. The Manager and the Letter
D. A Letter with £10
2. Why didn’t the secretary open the letter? Because _______.
A. he was very busy
B. it was a personal letter
C. there was a £10 note in it
D. the letter was unimportant
3. What happened to the writer of the letter in 1935?
A. He was engaged to a girl.
B. He was out of work for six months.
C. He lost a ring.
D. Both A and B.
4. What was true about the assistant?
A. She lost her job.
B. She was short of money.
C. She was called away while serving the customer.
D. She put one of the rings in her pocket.。