[题目]Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction．Friction happens when two things that aren't very smooth rub together to make heat energy.T 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction．Friction happens when two things that aren't very smooth rub together to make heat energy.The faster you rub two things together，the more friction (and heat) you can make. Let's discover friction!

WHAT YOU'LL NEED：

●A piece of soap ●Water ●Your hands

WHAT TO DO：

1.Make sure your hands are dry.

2.Rub your hands together until you feel the heat of your hands.

3.Now，use a piece of soap and water to get your hands very slippery (滑的)．

4.Try to make friction happen while your hands are slippery.

5.Please write down what has happened.

LET'S TALK!

Friction is a kind of energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won't make much friction and your hands won't get so hot.

DID YOU KNOW?

1.Friction happens when you stop your fast running bike.

2.Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn't know it.

__________

Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not too hot, touch the tires (轮胎) of the car before and after a short drive to see how much warmer they get from friction.

【1】You'd better make your hands ________ to get heat when you rub them.

A. slippery B. dry C. wet D. smooth

【2】What does the underlined word “friction” in this text mean in Chinese?

A. 摩擦 B. 冷却 C. 膨胀 D. 震动

【3】________ is NOT an example of friction.

A. Bike riding B. Car driving

C. Hands rubbing D. Friction discovering

【4】What's the last column (栏目)?

A. THINK IT OVER!

B. WHAT HAPPENED?

C. EVERYDAY ACTION：

D. WORK WITH PARENTS!

【5】This text is most probably ________.

A. a science report B. a car advertisement

C. a rubbing introduction D. a chemistry programme

【答案】

【1】B

【2】A

【3】D

【4】C

【5】A

【解析】

【1】细节题：从文章的句子：When your hands are slippery, they won’t make very much friction and your hands won’t get so hot.可知手在干的时候，摩擦才能生热。选B

【2】猜词题：从所在的句子：Friction happens when two things that aren’t very smooth rub together to make heat energy.可知friction是摩擦的意思。选A

【3】文章最后一段提到：汽车，开车，摩擦手，都是摩擦错的例子。选D

【4】从最后一段的句子：ask your parents to take you out in a car.可知答案是D

【5】这篇文章介绍了什么是摩擦，怎么产生的，是一篇科学报道。选A

练习册系列答案

相关题目

【题目】连词成句

【1】opened,he,door,the,let,in,to,her(.)

_____________________________________________________________________

【2】will,they,never,probably,me,let,again,swim(.)

_____________________________________________________________________

【3】did,he,not,the,get,ball,the,into,basket(.)

______________________________________________________________________

【4】did,you,what,from,the,learn,experience(?)

________________________________________________________________________

【题目】In modern society there is a great deal of argument about competition. Some value it highly, for they believe that it is helpful for social progress and richness, others say that competition is bad; and that it sets one person against another and leads to unfriendly relationship between people.

I have taught many children who held the belief(看法) that their self – worth came from how well they performed at tennis and other skills. For them, performing well and winning are often life-and-death matters. Sadly, they forget to develop many other human qualities.

However, while some seem to wish to succeed very much, others think quite the opposite. They, especially young people have suffered from competitive stress from their parents or society. Teaching these young people, I often find that they choose to fail. They seem to choose failure by not trying to win or achieve success. By not trying, they always have an excuse: “I may have lost, but it doesn’t matter because I really didn’t try.” In fact, they are worried that if they had really tried and lost, that would mean they were worth nothing.

Clearly, this belief is the same as that of the true competitors who try to prove their self – worth. Both are based on the mistaken belief that one’s self – worth come from how well one performs in comparison(比较) with others. Both are afraid of not being valued. I suggest that they can discover a new meaning in competition only when such worries and fear begin to disappear.

Opinions about competition

Main argument	Some believe that competition 【1】 social progress and richness, while others think competition 【2】 to unfriendly relationship between people.
Children’s performances	Some children only care about 【3】 well and winning It is 【4】that they forget to develop many other human qualities.
Children’s performances	Some children don’t try to win or 【5】 success but choose failure. They are 【6】 that if they had really tried and failed, it would mean they weren’t worth 【7】.
Reason behind	They think one can 【8】 his self-worth only by performing better than others in competition. Both are 【9】 of not being valued.
Writer’s 【10】 to children	Find the new meaning of competition as such worries and fear begin to disappear.

【题目】If you think it is cold where you are at the moment, then a visit to the Russian village of Oymyakon might just change your mind. The small village is in the heart of Siberia(西伯利亚). The name Oymyakon means “non-freezing water” because of a nearby hot spring, but it is indeed the coldest inhabited(有人居住的) place on the earth.

Oymyakon sits just a few hundred miles from the Arctic Circle(北极圈). The average(平均) temperature remains below 50°C in winter and the lowest temperature there was 67.7°C. This is the lowest recorded temperature in the Northern Hemisphere(北半球). Oymyakon is white in winter, since everything is frozen and covered with thick snow. But it’s also dark—the length of daytime is only three hours.

Because of the weather, people’s life there is inconvenient(不方便的), yet simple and traditional. Most homes still burn coal and wood for heat. When people go outside, they have to wear fur coats to stay warm. They can’t wear glasses, or the glasses will freeze to their face. There are few modern conveniences for them to enjoy. People don’t use mobile phones, because the batteries(电池) cannot work in such low temperatures. Cars can only be placed in heated garages. The ones left outside must keep running, or they won’t restart.

【1】Which country does the village Oymyakon lie in?

____________________________________________

【2】How far is it from Oymyakon to the Arctic Circle?

____________________________________________

【3】Which season has the shortest daytime in the village Oymyakon?

____________________________________________

【4】What do the villagers wear when they go outdoors?

____________________________________________

【5】Why can’t the mobile phones be used in Oymyakon?

____________________________________________

【题目】

cover，start, we， thank， long， member， hour， stop， join， second， obvious， guest

We met a dog when we walked along the road in a rural （乡村的）area. We thought maybe his family was camping somewhere nearby, so we passed him by. A few 【1】 later, on our return trip, he was still in the same place. When he saw 【2】 , he laid down in the middle of the road, so we were unable to get around him.

We 【3】 the car and looked around for a few minutes, trying to figure out if anyone who was around him. Nobody appeared, so we felt that he was abandoned.

My husband said, “If he doesn’t bite me when I try to pick him up, then we have a new dog.” Then the dog happily 【4】 us with no fight at all. He kept sticking his head between the two front seats and 【5】 us for picking him up.

The dog was extremely under weight. He was 【6】 with new wounds. So we fed him a lot in the next 【7】 weeks and he gained over twenty pounds. We took him to the veterinarian(兽医), and he said the dog appeared to be in good health.

He had 【8】 been mistreated（虐待）, but he was still so sweet. He had no manners, but he was a quick learner. He no 【9】 tried to get on the bed, but liked sitting in one of the folding chairs. Since then, he had become a 【10】 of our family.

【题目】用括号内所给单词的适当形式填空。

【1】Bob’ s________ (pronounce) is poor, so he should practise it a lot by reading aloud.

【2】Scientists are working________ (develop) and improve the newest spaceships.

【3】They laughed________ (loud) when they heard what the boy said.

【4】I’m writing to tell you a piece of________ (excited) news.

【5】Are there any________ (letter) in the right- hand corner of the blackboard?

【6】Peter read the story, but he couldn’t understand________ (it) meaning.

【7】Don’t throw it away; it may be________ (help) to us.

【8】Jack likes to collect different kinds of fallen________ (leaf) in autumn.

【9】It was________ (polite) of you to cut in other people’s conversation.

【10】Be careful! The horse will kick if a_______ (strange) walks near him.

【题目】―My sister is going to the USA for further study.

―How lucky! It's a good chance to improve .

A. myself B. yourself C. herself D. himself

【题目】将下列句子译成英语，并将所译句子写在答题卡标有题号的横线上。

【1】当时我怀疑我是否别无选择只能放弃了。

______________________________________________________________________________

【2】那部正在上映的电影真感人!

______________________________________________________________________________

【3】这个女孩加入我们读书俱乐部多久了?

______________________________________________________________________________

【4】对我们来说每天喝足够的水保持健康是很重要的。

______________________________________________________________________________

【5】考试时再怎么仔细也不为过。

______________________________________________________________________________

【题目】On March 14, one of science’s brightest stars went dark. Stephen Hawking, the world-famous British scientist, died at 78 in Cambridge, UK.

Hawking is considered by many to be the greatest scientist in history since Albert Einstein. He came up with the theory（理论） that theuniverse(宇宙) began with the Big Bang and will end in black holes. His theories became the base for a lot of later research. He also wrote books to help common people understand the universe. His most famous book isA Brief History of Time, which has sold more than 10 million copies around the world.

Besides his scientific achievements, Hawking was also someone who had a strongwill. When he was 21, he got a serious illness that stopped him from walking and talking. Later in life, he had to sit in a wheelchair and “speak” using a computerized voice. But this didn’t stop him from living a meaningful and colorful life.

He celebrated his 60th birthday by going up in a hot-air balloon; when he was 65, he took part in a zero-gravity(零重力) flight to experience weightlessness. He hoped to travel into space one day. In 2015, Hawking spoke about how he felt life was unfair when he first knew about his illness. “But now, 50 years later, I can be quietly satisfied with my life,” he said.

【1】Which of the following is TRUE according to Paragraph 2?

A. Albert Einstein is less popular than Hawking

B. Hawking wrote books to make his theory simpler

C. Hawking’s most famous book is “Black Holes”.

D. Stephen Hawking is well-known as a successful writer

【2】Hawking first felt____________ when he knew he got such a serious illness.

A. successful B. afraid C. hopeless D. brave

【3】According to Paragraph 4, how did Hawking celebrate his 60th birthday?

A. By travelling into the space B. By making an exciting speech

C. By writing a famous book D. By going up in a hot-air balloon

【4】What can we know about Hawking’s whole life?

A. Meaningful and colorful B. Colorful but dangerous

C. Sad but satisfied D. Meaningful but exciting

试题分类