Electrical devices(仪器)could soon use power made by human energy. Scientists say
they have developed an experimental device that produces electricity from the physical movement of a person walking. British scientist Max Donelan and other scientists in Canada and the United States developed the device.
The device connects to a person’s knee. As the person walks, the device captures energy each time the person slows down. To do this, the device helps with the slowing down movement of the leg. The movements of the walking person push parts of a small machine
that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.
There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also be used in hospitals to operate heart pacemakers(起搏器). It could even be used to assist in the movement of robotic arms and legs.
The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy. But the researchers hope to make a lighter, less costly version. An improved version shou1d be ready in one year.
The developers hope the device will one day help developing countries. Near1y twenty five percent of people around the world live without electric power.
A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania. He created a bag carried on a person’s back that also produces power from wa1king.
The knee device does not produce as much electricity as the bag. But the bag requires the walker to carry a load of twenty to thirty kilograms.
The second paragraph mainly talks about .
A．who developed the device B．how the device works C．several possible uses for the devices D．how much electricity the device can produce
A．It is too heavy for the walker to bear. B．It is too complex for people to use. C．It is too expensive for most people to afford. D．It will slow down one’s walking speed.
A．produces power without adding more loads to the walker B．can produce more power in a much shorter time C．needs to be equipped with a battery D．can help the walker wa1k faster
A．help housewives operate the washing machine B．make it much easier for us to go online C．produce more electricity than that invented by Larry Rome D．be applied in medicine to operate heart pacemakers
A．First device powered by walking wi1l soon be on the market B．Advanced technology brings in a new way to operate heart pacemakers C．Device gives new meaning to the idea of power walking D．Human energy will become a main source of electricity
I was sure that I was to be killed. I became terribly 16 . I fumbled(摸索) in my pockets to see if there were any cigarettes, which had 17 their search. I found one. But I had no matches, for they had taken those. I 18 the bars at the jailer(狱卒). He did not make eye contact with me. I 19 out to him, “Have you got a 20 ?” He looked at me, shrugged (耸肩) and came over to light my cigarette. As he came close, I 21 . I don't know why I did that. It was as though a spark jumped across the 22 between our two hearts. My smile leaped through the 23 and generated a smile on his lips, too. He lit my cigarette but stayed 24, looking at me directly in the eyes.
I kept 25 at him, and his looking at me seemed to have a new dimension(方面) too. “Do you have 26 ?” he asked. “Yes, here, here.” I took out my wallet and 27 fumbled for the pictures of my family. He, 28, took out the pictures of his family and began to talk about his plans and hopes for 29 . My eyes filled with tears, I said that I 30 that I’d never see my family again, never have the 31 to see them grow up. Tears came to his eyes, too. 32 , without another word, he 33 my cell and silently led me out. Out of the jail, quietly and by back routes, out of the town.
My life was saved by a smile. Yes, the smile―the 34 , unplanned, natural connection between people. I really believe that if that part of you and that part of me could recognize each other, we wouldn't be enemies. We couldn't have 35 or envy or fear.
A．excited B．lonely C．impatient D．nervous
A．escaped B．attracted C．confused D．misled
A．broke off B．bent down C．looked through D．fixed up
A．called B．let C．reached D．ran
A．light B．watch C．cigarette D．key
A．cried B．laughed C．smiled D．whispered
A．size B．gap C．weight D．rate
A．prison B．bars C．noise D．silence
A．far B．calm C．near D．angry
A．smiling B．shouting C．staring D．pointing
A．pictures B．kids C．time D．strength
A．freely B．strongly C．unwillingly D．nervously
A．finally B．however C．too D．accidentally
A．them B．me C．fun D．pleasure
A．promised B．intended C．insisted D．feared
A．idea B．chance C．desire D．hope
A．Suddenly B．Gradually C．Politely D．Skillfully
A．broke B．blocked C．unlocked D．left
A．impossible B．invisible C．unknown D．unaffected
A．hate B．dream C．competition D．poverty
Some myths are stories used since ancient times , to explain the causes of natural phenomena. The Greek myth that explains why there are changes of ___1_____I about Demeter, the goddess of the harvest. She had a daughter, Persephone , whom she loved very much. Hades, god of the underworld , fell in love with Persephone, and he asked Zeus, the ___2_____ of the gods, to give Persephone to him as his _____3____. Zeus did not want either to disappoint Hades or to upset Demeter, so he said he would not agree to the marriage, but neither would he ___4______ it. Hades, therefore, decided to take the girl without ____5____. When Persephone was picking flowers in the garden, he seized her and took her to the underworld. When Demeter ____ 6 ___ what happened to Persephone, she became so ___7____ that she caused all plants to _____8___. People were in_____9____ of starving. But Demeter was determined not to let crops grow____10______ . her daughter , Persephone, was returned to her. ____11______, still not wanting to disappoint Hades, decided upon a condition for Persephone’s ____12___. She could go back to her mother if she had not ___13_____ anything while she was in the underworld Demeter ___14_____it, underworld. When Zeus_____15____ this , he decided that Persephone could spend part of the year with her ____16_____. But he added that since she had eaten the seeds , she had to spend part of the year in the underworld.; And so it __17____ that when Persephone is in the underworld, Demeter is sad and ___18_____ not let the crops grow. That is ___19_____ we have winter when plants do not grow. When Persephone returns, Demeter is ____20_______. It becomes spring , and plants begin to grow again.
A．periods B．seasons C．time D．age
A．winner B．ruler C．advisor D．fighter
A．wife B．lover C．partner D．daughter
A．forbid B．forgive C．admit D．accept
A．arrangement B．warning C．reason D．permission
A．let out B．worked out C．thought out D．found out
A．excited B．tired C．angry D．serious
A．grow fast B．start growing C．stop growing D．grow slowly
A．danger B．hope C．turn D．case
A．since B．until C．after D．when
A．Persephone B．Zeus C．Demeter D．Hades
A．return B．change C．marriage D．journey
A．stolen B．found C．eaten D．heard
A．understood B．refused C．doubted D．accepted
A．discovered B．studied C．forgot D．prepared
A．daughter B．mother C．god D．ruler
A．works B．remains C．happens D．starts
A．should B．can C．dare D．will
A．where B．because C．why D．how
A．nice B．friendly C．fresh D．happy
It was a cold winter’s night when I stopped for gas on my way home from work．I was tired and had a slight 36 ．
I worked in a 37 doctor’s office and this was one of those days when the unexpected happened, making the schedule run 38 than usual．It seemed I was going to be late 39 home and my husband, being the 40 person, would be ready to pronounce（宣布） me late once again．Maybe 41 I hurried, I could still make it home．
I was heading inside to 42 for my gas when I noticed an older couple at the counter．I heard them asking for 43 to the local hospital．It was the same hospital that I had just 44 a few minutes ago．
The young man at the counter was trying to be 45 in explaining how to get there, with two other people making 46 ．One of them was 47 trying to give them a whole different route back．It was then that I walked over to the couple and said, “Would you like to follow me to the 48 ?”
A look of 49 crossed the woman’s face．
“I’m going right by there,” I said, which wasn’t a（an） 50 since I had just made up my mind to do 51 that．
I got in my car and began the journey back．I was trying to watch to be sure they were right 52 me．It took only fifteen minutes to get there as rush hour traffic was beginning to 53 ．I felt better than I had all day and my headache was nearly gone．
Later, as I arrived home, my husband 54 , “So you aren’t ever late any more．”
I said, “Sometimes it’s 55 to be late．”
A．break B．headache C．cold D．fever
A．foreign B．common C．noisy D．busy
A．earlier B．easier C．later D．simpler
A．working B．cooking C．calling D．getting
A．punctual B．tough C．generous D．careful
A．as B．since C．while D．if
A．change B．pay C．wait D．search
A．opinions B．directions C．trouble D．money
A．reached B．visited C．called D．left
A．skilled B．active C．experienced D．helpful
A．jokes B．promises C．comments D．offers
A．only B．still C．even D．ever
A．station B．hospital C．office D．hotel
A．duty B．lie C．reason D．fact
A．partly B．exactly C．properly D．perfectly
A．across B．before C．beside D．behind
A．go up B．speed up C．die down D．turn down
A．teased B．shouted C．burst D．laughed
A．possible B．good C．special D．safe
I was blind, but I was ashamed of it if it was known. I refused to use a white stick and 36 asking for help. After all, I was a teenage girl, and I couldn’t bear people to look at me and think I was not 37 them. I must have been a terrible danger on the roads. Coming across me wandering through the traffic, motorists probably would have to step 38 on their brakes. Apart from that, there were all sorts of disasters that used to occur on the way to and from work.
One evening, I got off the bus about halfway home where I had to change buses, and as usual I 39 something. “I’m awfully sorry,” I said and stepped forward only to run into it again. When it happened a third time, I realized I had been 40 to a lamppost. This was just one of the 41 things that constantly happened to me. So I carried on and found the bus stop, which was a request stop, where the bus wouldn’t stop 42 passengers wanted to get on or off. No one else was there and I had to try to guess if the bus had arrived.
Generally in this situation, because I hated 43 I was blind by asking for help, I tried to guess at the sound. Sometimes I would 44 a big lorry and stand there feeling stupid as it drew away. In the end, I usually managed to 45 my pride and ask someone at the stop for help.
46 on this particular evening no one joined me at the stop; it seemed that everyone had suddenly decided not to travel by bus. Of course I heard plenty of buses pass, or I thought I did. But because I had given up stopping them 47 making a fool of myself. I let them all go by. I stood there alone for half an hour without stopping one. Then I gave up. I decided to walk on to the next stop.
A．tended B．liked C．hated D．objected
A．like B．against C．at D．for
A．bravely B．rapidly C．slowly D．cautiously
A．came into B．ran into C．got into D．turned into
A．saying B．talking C．apologizing D．arguing
A．unexpected B．arbitrary C．objective D．stupid
A．if B．when C．unless D．as long as
A．showing B．accepting C．representing D．understanding
A．plan B．stop C．get on D．ask for
A．reveal B．substitute C．submit D．swallow
A．But B．So C．For D．While
A．in spite of B．for fear of C．instead of D．in terms of
People always say that the earlier one learns a language, the ___1___ it is to do so, in theory it is that, ___2___, in my opinion, that refers to spoken language. Capability to practise some essential ___3___ of a language and read between the lines can only be trained through proper reading ways and hard work ___4___. So spending money to help ___5___ learn English may ___6___ with disappointment. It is likely that the more you ___7___, the more you are let down.
The daughter of one of my friends ___8___ English in primary school, ___9___ her foreign teacher’s blindness ___10___ psychology. She did not want to go on ___11___ English until middle school, ___12___ a college student studying in English slowly ___13___ her interest in the language.
It is better to have the child learn Chinese, than to have some difficulty ___14___ learning English for several years. Having been engaged in English education, ___15___ find that despite their excellent ___16___, many students have ___17___ command of English words and phrases. So I suggest that children ___18___ classical Chinese prose, rather than ___19___ them to learn English hurriedly. Otherwise, they may ___20___ the best time to improve the language ability of their mother tongue.(www.yygrammar.com)
A．easy B．difficult C．easier D．more difficult
A．but B．however C．though D．yet
A．opinions B．regards C．requests D．expressions
A．directly B．orally C．properly D．indirectly
A．people B．girls C．children D．boys
A．begin B．start C．finish D．end
A．pay B．get C．buy D．take
A．loved B．liked C．disliked D．learned
A．because of B．because C．instead of D．instead
A．of B．at C．in D．to
A．learning B．to learn C．with learning D．for learning
A．while B．where C．when D．as
A．introduced B．practised C．explained D．developed
A．in B．to C．at D．of
A．He B．I C．She D．They
A．pronunciation B．phrase C．language D．writing
A．few B．less C．little D．fewer
A．write B．do C．remember D．memorize
A．have B．let C．cause D．make
A．get back B．let go C．bring in D．go away
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