You know that balloons must be kept away from sharp objects. They also needed to be kept away from flames. A fire can weaken the rubber and cause it to break. However, in this experiment you will find out how you can hold a balloon directly in a flame without breaking the balloon.
Materials needed:
● two round balloons not inflated(充气的)
● several matches
● water
Inflate one of the balloons and tie it. Place 1/4 cup of water in the other balloon, and then inflate it
and tie it. Light a match and hold it under the first balloon. Allow the flame to touch the balloon. What happens? The balloon breaks, perhaps even before the flame touches it. Light another match. Hold it directly under the water in the second balloon. Allow the flame to touch the balloon. What happens to this balloon? It doesn’t break.
Why does the balloon with no water break in the flame? The flame heats the rubber of both balloons. The rubber of the balloon without water becomes so hot that it becomes too weak to resist the pressure of the air inside the balloon. However, when the balloon with water in it is placed in the flame, the water takes in most of the heat from the flame. Then, the rubber of the balloon doesn’t become very hot, it doesn’t weaken, and the balloon doesn’t break.
Water is a particularly good absorber(吸收者) of heat. It takes a lot of heat to change the temperature of water. On the other hand, when water cools, it gives off a great deal of heat. That’s why areas near oceans or other large bodies of water don’t get as cold in winter as areas at the same latitude(纬度) further inland.
1. From the passage we can know the following aspects of the experiment except______.
A. method B. material
C. result D. time
2.What does the underlined word “resist” in Para 4 probably mean?
A. add B. expand
C. bear D. form
3. When the flame reaches the balloon with water inside, ______
A. the rubber of it doesn’t become hot at all
B. the water in it begins to boil
C. the balloon breaks
D. the heat is mostly taken in by the water
4. The purpose of the experiment described in the passage is to prove that______.
A. water is a particularly good absorber of heat
B. some balloons can be easily broken, while others can’t.
C. balloons without water are not as strong as those with water inside.
D. the temperature is not up to the latitude.
高一英语阅读理解中等难度题
You know that balloons must be kept away from sharp objects. They also needed to be kept away from flames. A fire can weaken the rubber and cause it to break. However, in this experiment you will find out how you can hold a balloon directly in a flame without breaking the balloon.
Materials needed:
● two round balloons not inflated(充气的)
● several matches
● water
Inflate one of the balloons and tie it. Place 1/4 cup of water in the other balloon, and then inflate it
and tie it. Light a match and hold it under the first balloon. Allow the flame to touch the balloon. What happens? The balloon breaks, perhaps even before the flame touches it. Light another match. Hold it directly under the water in the second balloon. Allow the flame to touch the balloon. What happens to this balloon? It doesn’t break.
Why does the balloon with no water break in the flame? The flame heats the rubber of both balloons. The rubber of the balloon without water becomes so hot that it becomes too weak to resist the pressure of the air inside the balloon. However, when the balloon with water in it is placed in the flame, the water takes in most of the heat from the flame. Then, the rubber of the balloon doesn’t become very hot, it doesn’t weaken, and the balloon doesn’t break.
Water is a particularly good absorber(吸收者) of heat. It takes a lot of heat to change the temperature of water. On the other hand, when water cools, it gives off a great deal of heat. That’s why areas near oceans or other large bodies of water don’t get as cold in winter as areas at the same latitude(纬度) further inland.
1. From the passage we can know the following aspects of the experiment except______.
A. method B. material
C. result D. time
2.What does the underlined word “resist” in Para 4 probably mean?
A. add B. expand
C. bear D. form
3. When the flame reaches the balloon with water inside, ______
A. the rubber of it doesn’t become hot at all
B. the water in it begins to boil
C. the balloon breaks
D. the heat is mostly taken in by the water
4. The purpose of the experiment described in the passage is to prove that______.
A. water is a particularly good absorber of heat
B. some balloons can be easily broken, while others can’t.
C. balloons without water are not as strong as those with water inside.
D. the temperature is not up to the latitude.
高一英语阅读理解中等难度题查看答案及解析
If you want your land to keep fertile, you must try to stop soil from being carried away by water or wind. When soil is taken away by flowing water or blowing winds we call it soil erosion. Ways have been found to stop soil erosion, and this is known as soil conservation. One way of stopping soil erosion is to grow small plants such as grass. These plants are referred to a cover crops, whose roots hold the soil tightly together. The rain water can not wash away the soil. When trees and tall bushes are planted at the edges of an open field, soil erosion by strong winds can not take place. The trees and bushes, which act as a very big and firm wall, protect the open land from the winds. The way to stoop soil erosion on slopes is to build terraces on the slope of hillside and mountainside. When the slope of a hillside is cut into “step”, water carrying soil can not run straight down the terraces, which are used to slow down the speed of the flowing water containing much soil in it. In this way most of the soil in the water is left behind on the terraces, much soil in it.
1.What takes place in soil erosion?
A. Flood happens to the fertile land
B. A large quantity of the soil loses away gradually.
C. Terraces are built on the slope of hillside or mountainside.
D. Plants are grown to protect the open land
2.“Cover crops” in this passage means _________.?
A. grass B. trees and bushes C. plants life and an area
E. covering plants that produce grain or vegetables
3.Besides growing small plants, another method to fight against soil erosion is to ___________.
A. build terraces B. build walls C. plant trees D. plant tall bushes
4.According to the passage, trees and tall bushes are planted around an open field ________________.
A. because their roots hold soil tightly
B. to stop soil from being blown away by winds.
C. Because soil erosion causes terrible damages to crops
D. To keep the balance of nature
5.Which of the following is the best title of the passage?
A. What Causes Soil Erosion
B. The Importance of Erosion
C. Rain Erosion and Wind Erosion
D.Erosion and the Way of Tight against Erosion
高一英语阅读理解简单题查看答案及解析
Sometimes people come into your life and you know right away that they are meant to be there.1. They teach you a lesson,or help you figure out who you are or who you want to become.
2.They may be a roommate,a neighbor,a professor,a friend,a lover,or even a complete stranger.Sometimes things happen to you that may seem horrible at first,but later you will find that without those difficulties you would have never realized your potential.3.It would be safe and comfortable,but dull and completely pointless.
The people you meet who affect your life,help to create who you are and who you become.4.In fact,they are sometimes the most important ones.
If someone loves you,give love back to them not only because they love you,but also because they are teaching you to love and how to open your heart and eyes to things.
5.They have helped you learn about trust and the importance of being cautious to whom you open your heart to.
Make every day count.Appreciate every moment.
A.They serve some sort of purpose.
B.Learn a lesson in life each day that you live.
C.Even the bad experiences can be learned from.
D.You never know who these people may be.
E.If someone hurts you,or breaks your heart,forgive them.
F.Without these small tests,life would be like a smooth road to nowhere.
G.If you don't believe in yourself,it will be hard for others to believe in you.
高一英语七选五中等难度题查看答案及解析
Sometimes people come into your life and you know right away that they were meant to be there.1.They teach you a lesson,or help you figure out who you are or who you want to become.
2.They may be a roommate,a neighbor,a professor,a friend,a lover,or even a complete stranger.Sometimes things happen to you that may seem horrible at first,but later you will find that without those difficulties you would have never realized your potential.3.It would be safe and comfortable,but dull and completely pointless.
The people you meet and affect your life,help to create who you are and who you become.4.In fact,they are sometimes the most important ones.
If someone loves you,give love back to them not only because they love you,but because they are teaching you to love and how to open your heart and eyes to things.
5.Because they have helped you learn about trust and the importance of being cautious to whom you open your heart to.Make every day count.Appreciate every moment.
A.They serve some sort of purpose.
B.You never know who these people may be.
C.Learn a lesson in life each day that you live.
D.Even the bad experiences can be learned from.
E.If someone hurts you,or breaks your heart,forgive them.
F.Without these small tests,life would be like a smooth road to nowhere.
G.If you don't believe in yourself,it will be hard for others to believe in you.
高一英语七选五中等难度题查看答案及解析
I know that something you get that sense from TV that you can be rich and successful without any hard work---your ticket to success is through rapping or basketball or being a reality TV star. 1. .
The truth is, being successful is hard. You won’t love every subject that you study. 2. Not every homework assignment will seem completely relevant to your life right at this minute. And you won’t necessarily succeed at everything the first time your try.
That’s okay. 3. JK Rowling---- who wrote Harry Potter---her first Harry Potter book was rejected 12 times before it was finally published. Michael Jordan was cut from his high school basketball team. He lost hundreds of games and missed thousands of shots during his career. But he once said, “I have failed over and over again in my life. And that’s why I succeed.”
These people succeeded because they understood the secret of success ---you can’t let your failures define you. 4. You have to let them show you what to do differently the next time. So if you get into trouble, that doesn’t mean you are a troublemaker, it means you need to try harder to act right. 5.
A. If you get a bad grade, that doesn’t mean you’re stupid, it just means you need to spend more time studying.
B. Some of the most successful people in the world are the ones who have had the most failures.
C. You have to let your failures teach you.
D. You won’t get along well with every teacher that you have.
E. So many of you dream of being successful by hard work.
F. Failures can lead you to success.
G. Chances are you’re not going to be any of those things.
高一英语其他题中等难度题查看答案及解析
You cannot see any object unless light from that object gets into your eyes. Some of the things you see give off light of their own. The sun, the stars, a lighted lamp are examples that can be ssen by their own light. Such things are luminous. Most of the things you see are not giving off light of their own. They are simply reflecting light that falls on them from the sun or some other luminous bodies. Then moon , for example , does not give off any light of its own. It is non-luminous. You see it because sunlight falls on it and some of it reflects in your direction. So moonlight is only secondhand sunlight.
When you look at a book, it sends your eyes some of the light that falls on it, and you see the book. If light could be kept out from where you are so that there would be no light for the book to reflect, then you could not see the book even with your eyes wide open.
Light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if it took no time at all. Light reaches us form the moon , which is about 380,000 kilometers away, in only a little more than a second.
1.You can see the book because___________.
A.your eyes are close to it . | B.it reflects light |
C.it has light of its own | D.your eyes can get to it |
2.The word “ reflects” means____________.
A.throws back | B.takes back |
C.gives off | D.sends out |
3. ___________ have light of their won.
A.the sun and the moon | B.The stars and the earth |
C.The sun and the stars | D.The moon and the earth |
高一英语阅读理解简单题查看答案及解析
You can not see any object unless light from that object gets into your eyes. Some of the things you see give off light of their own. The sun, the stars, a lighted lamp are examples that can be seen by their own light. Such things are luminous. Most of the things you see are not giving off light of their own. They are simply reflecting light that falls on them from the sun or some other luminous bodies. The moon, for example, does not give off any light of its own. It is non-luminous. You see it because sunlight falls on it and some of it reflects in our direction. So moon light is only second hand sunlight.
When you look at a book, it sends to your eyes some of the light which falls on it, and you see the book. If light could be kept out from where you are so that there would be no light for the book to reflect, then you could not see the book even with your eyes wide open.
Light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if there were no time at all. Light reaches us from the moon, which is about 380 000 kilometers away, in only a little more than a second.
1.You can see the book because_______.
A.your eyes are close to it | B.it reflects some of the sunlight |
C.it has light of its own | D.your eyesight can get to it |
2.The underlined word “luminous” means_______.
A.visible | B.all colors | C.giving off light | D.sunlight |
3.________ have light of their own.
A.The sun and the moon | B.The stars and the earth |
C.The sun and the stars | D.The moon and the earth |
4.Which of the following is true?
A.All the things you can see give off light. |
B.Light from the book is much shorter than that from the moon. |
C.The moment you open your eyes the light from the book travels to your eyes. |
D.Light travels so fast that there is no time for you to read. |
高一英语阅读理解中等难度题查看答案及解析
They urged that the library_______ open during the vacation.
A. must be kept B. is kept
C. would be kept D. be kept
高一英语单项填空困难题查看答案及解析
You must keep away from the man, who is ______. If you are ______, please call the number 110.
A.dangerous; dangerous B.dangerous; in danger
C.in danger; dangerous D.in danger; in danger
高一英语单项填空简单题查看答案及解析
Do you often lose things? Don’t worry. Now a new tool that can be connected to any object you might lose may be the way to solve your problem. The Tile, a small square linked up to your iphone or ipad by means of Bluetooth, lets you see how close you are to your missing item, within a 50-to-150-foot range. If the item goes out of your phone’s 150-foot range, it can still be found on other smart phones with the same app.
When you drive the app on your phone, it shows you, with green bars that increase or decrease, how close or far away you are from the Tile. You can also program it to make a sound when you get close to the Tile. And you can link up your phone with up to ten Tiles. And if your lost object—a dog, for example, or a stolen bike—go out of your own phone’s 150-foot Bluetooth range, you can set it as a “lost item”. If any of the phones with the Tile app comes within range of your lost item, a message will be sent to your phone, telling you its position. The Tile app also has the function to remember where it last saw your Tile, so that you can easily find where you left it.
Since the Tiles use Bluetooth rather than GPS, they are never out of battery or needn’t to be charged, and they work for one year before needing to be replaced. And the app works with all generations of iPhones and iPads.
For further information, please visit www. tile666.com.
1.What can the Tile app help you ?
A. To use your phone more wisely
B. To find your missing items
C. To save your phone’s power
D. To find other phone users
2.Which of the following is TRUE according to the passage?
A. The Tile needs to be charged after a year of use.
B. One smart phone can only be linked up with one Tile.
C. A missing item can’t be found if it goes out of your phone’s Bluetooth range.
D. The Tile cannot be linked up with a phone without Bluetooth.
3.What does the second paragraph mainly tell us?
A. What the Tile app is.
B. The advantages of the Tile app.
C. How the Tile app works.
D. Why the Tile app was created.
4.Where does the passage probably come from?
A. A health report. B. An advertisement.
C. A personal diary D. Science fiction.
高一英语阅读理解中等难度题查看答案及解析