精英家教网 > 高中英语 > 题目详情

【题目】 A little battery puts out a little bit of electricity, so you can use it safely for your experiments. But the electricity that comes through the wires in your house or school is much more powerful. 1 .

Inside the walls where you live or study, there are big wires that carry electricity. When you plug in a light or radio or other electrical appliance, you are putting the light or radio in the path way of the electricity. You have heard adults warn, “ 2‘ Now do you know why? If you did, you would become part of the electrical path way.

3 The electrical current coming through the wires to the wall plug is so strong that it would hurt a lot if you stuck your finger in the plug. Put your finger in there and it could be you, rather than the light bulb, that becomes part of the electrical path way. And that would hurt!

What if you held a piece of metal, like a fork or knife, and stuck it into the wall plug? Don't do it. Why? It's because metals also conduct electricity. 4

Don't touch any electrical appliance when you are wet. Can you think why? It's because water is a good conductor of electricity. When your hands are wet or when your body is in a bathtub full of water, the electricity could flow right through you and give you an awful shock, or even kill you.

Electricity is very useful, but it can be dangerous. 5If so, electricity can better serve you, instead of hurting you.

A.Life is precious!

B.So stay away from wires.

C.Be careful, be safe and be smart.

D.And you would get a terrible shock!

E.Don't stick your finger into the wall plug.

F.Therefore, keep in mind some safety rules.

G.Your body is a pretty good conductor of electricity.

【答案】

1F

2E

3G

4D

5C

【解析】

本文为一篇说明文。文章介绍了电在日常生活中会对人造成危害的几个情况及其原因。

1

结合前文A little battery puts out a little bit of electricity, so you can use it safely for your experiments. But the electricity that comes through the wires in your house or school is much more powerful. 一个小电池会放出一点点电,所以你可以安全地使用它来进行实验。但是通过家里或学校里的电线的电可能要强大得多。可知,家里的电路使用需要安全操作。F. Therefore, keep in mind some safety rules. 因此,请记住一些安全规则。符合此处语境。故选F项。

2

结合前文When you plug in a light or radio or other electrical appliance, you are putting the light or radio in the path way of the electricity. 当你插上电灯、收音机或其他电器时,就是在把电灯或收音机插在电路上。及后文Now do you know why? If you did, you would become part of the electrical path way. 你知道为什么吗?如果你这样做了,你就会成为电路的一部分。可知,如果插入插座孔,就会成为电路的一部分。E. Don't stick your finger into the wall plug. 别把你的手指伸进墙上的插头。符合此处语境。故选E项。

3

结合后文Put your finger in there and it could be you, rather than the light bulb, that becomes part of the electrical path way. 把你的手指放在那里,可能是你,而不是灯泡,成为电路的一部分。G. Your body is a pretty good conductor of electricity. 你的身体是很好的导电体。符合此处描述,身体和灯泡一样都是很好的导电体。故选G项。

4

结合前文The electrical current coming through the wires to the wall plug is so strong that it would hurt a lot电流通过电线传到墙上的插头,如果你把手指插在插头上会很疼。及前文It's because metals also conduct electricity. 因为金属也导电。可知,金属和人体一样也会导电,电击会使人感到疼痛。如果将叉子插入插座孔,人也会受到电击。.D. And you would get a terrible shock! 你会受到可怕的电击!故选D项。

5

结合后文If so, electricity can better serve you, instead of hurting you. 如果是这样的话,电可以更好地为你服务,而不是伤害你。C. Be careful, be safe and be smart. 小心,安全,聪明。提示安全用电的诀窍。故选C项。

练习册系列答案
相关习题

科目:高中英语 来源: 题型:

【题目】阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

If you’re a grandparent, shaking a leg with your grandchild might benefit both of you. That’s the conclusion of a new study from Israel, where researchers examined how dancing together 1 (positive) affected 16 grandmas and granddaughters. They’ve discovered it can encourage exercise and can also 2 (deep) ties between the two generations. Dancing “promoted physical activity even when the body was tired and weak,” said the study author. “This emphasizes the significance of the close and familiar relationship as 3 means to promote new experiences, 4 can occasionally seem impossible for the older person.”

The granddaughters teamed 5 their grandmas for three free-form dance sessions. They danced once a week for 10 to 15 minutes in their grandmother’s home. Granddaughters 6 (tell) to mirror their grandmas’ movements, encourage their abilities and let them rest when 7 (need). Videos of the dance sessions, 8 (person) diaries and interviews showed that the sessions led to positive feelings and better mood for the grandmothers. The granddaughters, meanwhile, got a new view on 9 (age).

Both groups were grateful and said the dance sessions strengthened10 (they) bonds, according to the study published recently in the journal Frontiers in Psychology.

查看答案和解析>>

科目:高中英语 来源: 题型:

【题目】阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式.

The mascot (吉祥物) for the Beijing 2022 Winter Olympic Games 1(show) to the public at Beijing’s Shougang Ice Hockey Arena on September 17th, 2019. The name of the mascot is “Bing Dwen Dwen”, which is 2(close) associated with the host nation’s culture.

The image of it is designed based 3the giant panda. 4(dress) in a full body suit of ice, a symbol of purity and 5(strong), the panda wears a helmet with colored halo (光环). The lines of the halo represent the snow 6 (track) and 5G technology. The heart shape in its left palm represents the host country’s hospitality.

The name “Bing Dwen Dwen” is a 7 (combine) of several meanings in the Chinese language. “Bing” is the Chinese character for ice, while “Dwen Dwen” is 8 common nickname (绰号) in China for children that implies the healthiness and cuteness.

The mascot perfectly combines the best elements and characteristics of China to show China’s warm invitation to friends from all over the world. It is also designed 9(promote) the Olympic spirit. There is no doubt 10 it will be a wonderful ambassador for China and the Beijing 2022 Winter Olympic Games.

查看答案和解析>>

科目:高中英语 来源: 题型:

【题目】目前你们市正在开展骑电动自行车必须戴头盔行动。假如你是高中学生李华,你打算给你 校英文报投稿,呼吁同学们响应这项行动,内容包括:

1.电动自行车为何是人们日常生活中最常见且最适用的交通工具;

2.为何要开展该项行动;

3.你的呼吁……

注意:1 .词数100左右,可适当增加细节以使行文连贯;

2.参考词汇:减轻mitigate

Dear Fellow Students,

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours sincerely,

Li Hua

查看答案和解析>>

科目:高中英语 来源: 题型:

【题目】 Recently, as I watched my son Nathan play basketball for his high school team, I started to feel sorry for myself and for him. His team was facing adversity (逆境) — it was the opponent’s home gym filled with their supporters, and Nathan’s team was left behind for three quarters of the game.

As for me, I had been fired earlier in the day. I was prepared for it as I had experienced the same thing 14 years earlier, but, just like a punch in the mouth, the blow is never softened because you were expecting it.

As I watched the adversity on the court that my son was experiencing, I recalled my earlier events, packing up everything in a box and waving goodbye to a great group of colleagues with whom I’d had the pleasure of working. During my driving home, I kept telling myself “Just like that time, I will find work again in a short time—I am confident in my experience and abilities.” It was the same belief that I tried to teach my son.

The basketball game entered the fourth quarter with Nathan’s team still trailing. As Nathan and his teammates fought back, I saw the focus and determination on him, as well as his teammates’faces. Then, with a tie game and seconds on the clock, Nathan found himself with the ball. There was no room for self-doubt. With skill and confidence he was able to tune out all that could drive his attention away and make the throw as if he had done it a thousand times. The joy on his face, the cheering from the crowd, and the silence on the other side of the gym—it was a moment that would make any parent proud.

As I sat there, my heart bursting with pride, it dawned on me that I had taught him determination in the face of adversity, and he had just taught me the same lesson. That brief moment of self-doubt and feeling sorry for myself was blown away by the actions of my son on the basketball court. He will play in the finals, but it doesn’t matter if he wins or loses, at this moment.

1What did the author intend to show by mentioning his experience 14 years ago?

A.He quit a job again.B.He disliked working with the colleagues.

C.He made a right career choice.D.He had confidence in his abilities.

2What can we infer from the passage?

A.Nathan’s teammates couldn’t focus on the play.

B.The author was never worried about his son’s team.

C.Nathan’s team lost the game at last.

D.The game was in a tie at one time.

3What is the passage mainly about?

A.A blow from losing a job.B.A lesson on the court.

C.The importance of teamwork.D.The rise and fall of a game.

查看答案和解析>>

科目:高中英语 来源: 题型:

【题目】请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意:每个空格只填1个单词。请将答案写在答题卡上相应题号的横线上。

Potential energy is the energy, chemical or physical, stored within an object, atom or molecule(分子). Think about a car at the top of a roller-coaster (过山车), pausing just before it slopes into the next turn. A log resting in a fireplace just before it is about to be lit is a treasure house of potential energy. As the log burns, the connections between carbon atoms that make up the wood are being broken down, and the potential energy stored within those connections is being released as heat and light. As a comet approaches a planet or star, it slows, momentarily affected by the larger body’s gravity. The potential energy builds up and then reaches a breaking point as the comet accelerates around the larger body, and is shot out to the other side.

Sports show countless examples every day of potential energy being transformed into kinetic energy. Kinetic energy is the energy of movement. When an archer(弓箭手)draws and holds her arrow, her bow is filled with stored potential energy. When she releases the bowstring, all the potential energy is quickly transformed into kinetic energy, which is transferred to the arrow that takes flight.

The transformation of stored potential energy into kinetic energy can also be made use of to power homes, factories and entire cities. The most notable example is the Hoover Dam. The Hoover Dam is an arch-gravity dam by design. This design name is the first clue as to how exactly the dam makes use of energy. Located in the Black Canyon of the Colorado River, the Hoover Dam formed, and now holds back Lake Mead — the largest reservoir in the United States.

Gravity acts as a force upon Lake Mead. Held at bay by the Hoover Dam, the waters of Lake Mead and the Colorado River gain greater potential energy with each passing moment. The Arizona and Nevada spillways(溢洪道)are two means by which the waters of Lake Mead can escape the dam. As the lake water falls over the walls into a spillway, potential energy is instantly transformed into kinetic energy. The channels through which the water normally escapes every day are the four intake towers. These towers allow the water flow through passageways to the powerhouse and hydroelectric generators. When the water reaches the intake towers and is allowed to flow down through the passageways, all the stored potential energy created by the force of gravity acting upon the water is transformed into kinetic energy, just as when water flows over the wall into a spillway. By taking advantage of the transformed potential energy of Lake Mead, the Hoover Dam provides power to California, Nevada and Arizona.

Moments like these happen all across the physical world, whether on the molecular or universe level.

Main points

Supporting details

What is potential energy?

Potential energy is the energy existing either in the chemical or physical 1, which is stored in an object.

When a car is sloping into the next turn from the top of a roller-coaster, it is building up potential energy.

When a log is burning, the connections between carbon atoms are being broken down, 2 potential energy as light and heat.

When a comet approaches a planet or star, the potential energy 3 to a breaking point and then the comet is shot out to the other side.

How is potential energy transformed into kinetic energy?

Potential energy can be transformed into kinetic energy, which is the energy4 by movement.

When the bowstring is released by an archer, the potential energy stored in the full bow is quickly transferred to the arrow, thus transformed into kinetic energy which sets the arrow 5 far away.

Hoover Dam is the most notable example of energy transformation.

Hoover Dam is 6 in the Black Canyon of the Colorado River, holding back Lake Mead.

The waters of Lake Mead escape the Dam, falling over the walls into Arizona and Nevada spillways, leading to the 7 transformation from potential energy into kinetic energy.

The 8 of potential energy is from the force of gravity acting upon the water

What 9 is the energy transformation made of?

Homes, factories and cities are efficiently 10 thanks to the powerhouses and hydroelectric generators taking advantage of the transformed potential energy.

查看答案和解析>>

科目:高中英语 来源: 题型:

【题目】 The boy sat on his chair, with his hands above the keyboard. He thought about what to write.

He recalled that the competition deadline was merely a week away. But he still had not even started on his piece. He looked at the brochure again.“WRITING COMPETITION” the title read. His mom had encouraged him to enter the writing competition, and now he was taking it on as his personal task for the holidays.

As the boy reflected on his previous writing efforts, he realized how hopeless his task of winning was. Every story he ever wrote was based on other stories. He had little imagination, and unfortunately, imagination was the key to writing.

Suddenly, he had a brainwave. This time, he came up with an original and imaginative story.

The words shot towards him like a storm of leaves. Words were coming easily, flowing through him, faster than he could type. He typed faster than he ever had before. He continued to type, amazed how easy writing this story was. The boy could not stop writing. He looked at the word count and saw the number “248” staring right back at him. He was not even halfway yet.

Then he heard his mother’s call of saying time for bed. He continued writing the piece, ignoring her. He had to make up for the time he had lost in thinking about a topic to write.

Finally, he finished. The word count now read “498”.

“Perfect” he thought, “just under the word limit.” He knew this was the story that would win.

He went to the website and searched for the competition. He found the page but there was no “Enter” button.

Confused, he then reread the page again. It read COMPETITION CLOSED.

1What caused the boy to take part in the writing competition?

A.A new computer.

B.The prize money.

C.His own interest.

D.His mom’s encouragement.

2How did the boy finish his earlier writing?

A.His mom helped him.

B.He copied others’ ideas.

C.His friends assisted him.

D.He used his imagination.

3Why did the boy delay his writing?

A.Because he was terribly lazy.

B.Because he didn’t know what to write.

C.Because he wasn’t confident.

D.Because he read too many stories.

4Which might be the maximum word limit for each entry?

A.100.B.250.

C.500.D.1000.

查看答案和解析>>

科目:高中英语 来源: 题型:

【题目】 A lot of kids struggle with reading. Parents have tried encouraging them in all sorts of ways, but nothing seems to work. Actually many factors(因素)can cause reading problems.1 Here are a few things you can do to help your kid become a better reader.

Read to your kid-and have him/her read to you

Grab one of the books you loved when you were your kid's age and read it to him/her or take turns reading it to each other. 2 Make reading a regular part of the night-time routine.

Don't be pushy

Just because you're a science fan or read on history and other nonfiction doesn't mean your kid will be remotely interested in any of those things. In fact, you've been pushing your tastes on your kid. 3

Choose books that interest your kid

Most kids love movies. Did your kid like Ready Player One or Ender's Game? They are based on books. 4 If your goal is to get your kid interested in reading and improve his/her skills, what your kid's reading is less important than how much time he/she spends doing it.

5

Kids who have trouble reading often feel that there's something wrong with them. So work with your kid to come up with manageable goals and make a big deal every time he/she accomplishes one. With time, gradually make the goals more challenging.

A.Achieve your goals

B.Celebrate small steps

C.Reading books can help your kid get a head start in school.

D.If your kid stops or makes a mistake, be patient and don't judge.

E.Overcoming them can sometimes be an annoying process for everyone.

F.Starting with something your kid is already interested in could help draw him into reading.

G.You may have contributed to his/her reading problems rather than helping overcoming them.

查看答案和解析>>

科目:高中英语 来源: 题型:

【题目】A total number of 172 people are now in hospital for treatment, of them 24 seriously ________.

A.being injuredB.injuredC.having injuredD.to be injured

查看答案和解析>>

同步练习册答案