In Henry's experiment，he connected the wire to______.A. a galvanometerB. an iron barC. a batteryD. an electromagnet
In Henry's experiment，he connected the wire to______.
A. a galvanometer
B. an iron bar
C. a battery
D. an electromagnet
相关考题：
If a photographer wanted to take pictures of moving things in the year of 1840, he had to______.A. watch lots of filmsB. buy an expensive cameraC. stop in most citiesD. take with him other machines apart from film
The expression "the cause of the disturbance" in paragraph 2 refers to______.A. the large tidal waveB. the powerful tidal pullC. the star coming near the sunD. one of the sun's planets
Henry is a little fatter than he wants to be． He ( 1 ) to lose some weight． So he is on diet． He tries not to eat to0 ( 2 ) and he eats very little sugar because it will make him ( 3 ) ． He also does exercise every ( 4 ) ．' He swims very often，( 5 ) he runs about two kilometers a day．Now he is ( 6 ) than before． Henry's sister，Susan，is healthier than Henry． ( 7 ) is also younger and thinner than he is． She does ( 8 ) every day，too． She doesn’t ( 9 ) much meat． But she eats a lot of fruit and vegetables because she thinks ( 10 ) are better for her health．( )1．A．wantsB．thinksC．asksD．likes
Henry's job was to examine cars which crossed the frontier to make sure that they were not smuggling anything into the country. Every morning，except at weekends，he (11) see a factory worker coming up the hill towards the frontier， (12) a bicycle with a big load of old straw on it. When the bicycle arrived the frontier，Henry used to stop the man and order him to take the straw off. Then he would examine the straw very carefully to see (13) he could find anything，after which he would look in all the man's pockets before he let him tie the straw up again. The man would then put it on his bicycle and go off down the hill with it. Although Henry was always (14) to find gold or jewelry or other valuable things hidden in the straw，he never found (15) ，even though he examined it very carefully. He was sure that the man was smuggling something，but he was not (16) 鱼to imagine what it could be.Then one evening，after he had looked through the straw and emptied the factory worker's pockets (17) usual，he said to him，“Listen，I know that you are smuggling things (18) this frontier. Won't you tell me what it is that you're bringing into the country so successfully? I'm an old man，and today's my last day on the job. Tomorrow I'm going to (19) . I promise that I shall not tell anyone if you tell me what you've been smuggling. ”The factory worker did not say anything for (20) . Then he smiled，turned to Henry and said quietly：“Bicycles. ”A. shouldB. mightC. wouldD. must
Passage TwoQuestions 26 to 30 are based on the following passage.The electromagnet was invented in England by William Sturgeon，who took an iron rod and bent it into the shape of a horseshoe. This “horseshoe” was coated with varnish and a layer of copper wire was wrapped around it. An electric current was passed through the wire，thus making the rod magnetic. The rod was now，because of magnetic attraction，able to support nine pounds of iron. In the US，a scientist named Joseph Henry improved on Sturgeon's electromagnet by insulating the copper wine with silk. He was able to wrap many turns of wire around an iron core without danger of short circuits between the turns. His magnet could hold 2,300 pounds. This experiment prompted Henry to try his hand at converting magnetism into electricity. First he coiled some insulated wire around an iron bar. connecting both ends of the wire to a galvanometer(电流表). The iron bar was placed across the poles of the electromagnet. Then the coil of the electromagnet was connected to a battery. The galvanometer indicated a voltage，then dropped to zero. Henry signaled his assistant to disconnect the coil. The galvanometer showed that once again a voltage had been produced，although this time in the opposite direction. The principle of electromagnetic induction had thus been discovered. Unfortunately for Joseph Henry he did not publish his findings and someone else(Faraday)got the credit for the discovery.The principle of electromagnetic was discovered by______.A. William SturgeonB. Joseph HenryC. FaradayD. someone else
Why did Sturgeon's electromagnet could support nine pounds of iron?A. Because the iron rod was bent into the shape of a “horseshoe”.B. Because the rod was coated with varnish.C. Because a layer of copper wire was wrapped around the rod.D. Because the rod was made magnetic by the passing current.
What is NOT TRUE about Henry's electromagnet?A. His magnet could. hold 2，300 pounds.B. His magnet was more dangerous.C. There were more turns of wire around the iron rod in his magnet.D. His magnet was an improved model.
In Henry's experiment，the galvanometer indicated a voltage when______.A. the coil was connected to a batteryB. the coil was disconnected to a batteryC. neither A nor BD. both A and B
Passage ThreeNine-year-old Louis Pasteur rushed into the little house, his face white."Mother!" he cried, "A mad dog has bitten my friend Henry, and now they are burning him with red-hot irons. It's terrible!""Rabies(狂犬病), Louis. Burning the bites is the only hope of stopping Henry from catching the disease."Henry did get rabies and died, in great pain, some days later. Louis Pasteur never forgot that. "One day," he thought, "I must do something to help people like Henry."Sixteen years later Pasteur became a Doctor of Science. Arid he began making important discoveries in his special field.Pasteur achieved great success in his life. But during the years of research he lost the use of his left arm and leg. Yet he worked on and on, as hard as ever, as he was eager to find a way for curing rabies. He never forgot his friend Henry.After many dangerous experiments on mad dogs, he finally found the answer. Just then a boy who had been badly bitten by a mad dog arrived at his lab. A few days after Pasteur's treatment the boy got better. He did not catch rabies.The discovery gave new hope to people in many countries. People sent money to help build the Pasteur Institute in Paris. Today it is one the world's most famous centers for research.44. Pasteur became a Doctor of Science. Doctor of science here means______.A. a degree which is the highest in scienceB. a person who works in the labC. a post in scienceD. someone whose job is to make sick people well again
BMr Henry lived in a small village with high mountains all around it． All day he worked on his farm and never went to the city． Sometimes he went to the town which is not far away to buy something，but he always walked there and never took a bus or a train． His wife died after his only daughter was born* When the girl，Ann，grew up，she left her father and went to col-lege． Four years later Ann passed all her examinations and found work in a hospital in the cap-ital． As she was busy，she had no time to go back to see her father． But she missed her father very much， So she wrote to his father and asked him to come to the capital．When Mr Henry heard from his daughter，he was quite happy and was soon ready to set off． The next day，as soon as he got to the station，he rang Ann up and told her the train he would take． At eight in the morning the train arrived at the Capital Station． Mr Henry had spent about sixteen hours on the train． As soon as he got off，he saw his daughter standing．there to meet him． Ann ran up to him and found that her father looked pale．"What，s the matter with you，Dad?"Ann asked in surprise． "Do you feel unwell? "Nothing，"answered Mr Henry． "I，m just not used to sitting backwards(背朝前) in the train． ""Oh，dear，"laughed the girl． "Why didn’t you exchange seats with the man opposite to you?""How can I do that?"answered Mr Henry． "No man sat opposite to me！( )26． Mr Henry was _________．A． a workerB． a driverC． a farmerD． a teacher
28， Mr Henry always went to the town on foot because___________A． the town was near to his villageB． he had no money to take a busC． he was afraid to take a busD． there is no bus there
Again as __________ in this experiment, he didn′ t lose heart.A.he failedB.did he failC.he did failD.had he failed
Henry’s business is much worse than before, therefore, he has to ______ the expense of his corporation.A.cut intoB.cut inC.cut downD.cut off
Which of the following is NOT said in the passage A.Wolfe‘s students praised Wolfe’s power of observation.B.The author made an experiment on Wolfe‘s ability.C.Wolfe‘s students asked the author to have a test of their ability.D.Wolfe did not feel angry when he was tested.
I wonder if Henry will come to the party at 8:00 sharp as he's promised. （）A、The party won‘t start until 8:00.B、Thank you for having the party for me.C、Don‘t worry. He always keeps his word.D、The party must cost a lot.
Which of the following is not true of British iron and steel industry?（）A、Britain.s steel industry is declining.B、No more new discoveries of iron ore have been found in Britain.C、Supplies of iron ore are now mostly foreign.D、Compared with newer plants in the world,Britain.s steelworks are not efficient.
单选题A direct current passing through a wire coiled around a soft iron core is the description of a simple（）.Amagnetic shieldBelectromagnetCpiezoelectric deviceDelectromagnetic domain
单选题Again as ______ in this experiment, he didn't lose heart.Ahe failedBdid he failChe did failDhad he failed
单选题I wonder if Henry will come to the party at 8:00 sharp as he's promised. （）AThe party won‘t start until 8:00.BThank you for having the party for me.CDon‘t worry. He always keeps his word.DThe party must cost a lot.
问答题Practice 2 Henry Ford did not invent the automobile, but he was the first man to mass-produce it, and this made it available to the ordinary man. Many automobiles were being built by the hand at the turn of the century and were much too expensive for all but the wealthy. In 1903 Henry Ford's first mass-produced Model T cars cost $850. By the early 1920s he was able to reduce the price, to $350. Between 1903 and 1927 Ford manufactured 15 million Model T Fords and earned a profit of $700 million. In 1927 he produced his sedan Model A, which was much more comfortable than the open, windswept Model T. Henry Ford was himself a born mechanic and could build a car with his own hands. So he respected his workers and treated them well. In 1914, when the basic wage for an industrial worker in Detroit was $11 a week, Ford announced that he would pay his Workers $5 a day. Ford believed in the dignity of work, and did not wish his men to become underpaid robots. He also built them a special town on the outskirts of the city.
单选题It was _____ back home after the experiment.Anot until midnight did he goBuntil midnight that he didn’t goCnot until midnight that he wentDuntil midnight when he didn’t go
单选题_____ in health, he insisted on doing the experiment.AAs he was poorBPoor as he wasCPoor was heDPoor he was though
单选题Henry looked very much______when he was caught cheating in the biology exam.AdiscouragedBembarrassedCdisappointedDbewildered