Circles can be found everywhere in the natural world, but with no exact way to measure(测量) them they are very mysterious and might never be completely understood. When you take the distance around a circle and divide it by the distance across a circle, you will always get Pi. While Pi is about 3.14 when rounded, it is endlessly long. With the help of computers, mathematicians(数学家) have been able to work Pi out to over a trillion decimal places(小数点后万亿位). This makes Pi mysterious, even to the most famous mathematicians.
Pi Day is celebrated on March 14, since the way we write this date, 3/14, looks just like Pi when rounded. In 2009, U. S. Congress voted to formally make March 14 Pi Day. Certain parts of the world—places where March 14 is written as 14/3—will instead celebrate Pi Approximation Day which takes place on July 22nd because of the division(除法) result of 22/7.
Pi has appeared in movies, comics, music, and more. “In modern movies, any time the filmmaker wants to create a sense of mystery, the symbol Pi is used,” says Blatner. People also love working to remember the digits(数位) of Pi and competing against others to see who can remember most. The Guinness World Record for remembering the most digits of Pi is held by Lu Chao of China, who successfully remembered Pi to nearly 67,000 decimal places.
Above all, Pi Day is about having fun with the number, according to Blatner. People will celebrate Pi Day by eating pie and throwing pie, and with fun Pi-related games. Princeton, New Jersey holds a series of Pi-related festivities. Events this year include a surprise birthday party for Albert Einstein whose birthday also falls on March 14, and a “Walk a Pi Event” where participants will walk 3.14 miles together. Just like the number itself, the possibilities for Pi Day are truly endless.
1.What makes Pi mysterious?
A. Ways to divide a circle B. Ways to use it when rounded
C. Being unable to write it as an expression D. Its endless decimal places
2.Why is Pi Day celebrated in some places on July 22nd?
A. Because it is announce formally B. Because it was corrected originally
C. Because the division result is similar to Pi D. Because that day is easier to remember
3.What is the goal of using Pi in films according to Blatner?
A. To move more viewers B. To call for viewers’ attention
C. To make the films more frightening D. To add something mysterious to the film
4.What can we learn from the text?
A. Lu Chao is the first Chinese to recite Pi
B. Many states in the USA celebrate Pi day on July 22nd
C. There are many different events to celebrate Pi Day in the world
D. Scientists will try their best to work out the digits of Pi thoroughly
九年级英语阅读单选中等难度题
Circles can be found everywhere in the natural world, but with no exact way to measure(测量) them they are very mysterious and might never be completely understood. When you take the distance around a circle and divide it by the distance across a circle, you will always get Pi. While Pi is about 3.14 when rounded, it is endlessly long. With the help of computers, mathematicians(数学家) have been able to work Pi out to over a trillion decimal places(小数点后万亿位). This makes Pi mysterious, even to the most famous mathematicians.
Pi Day is celebrated on March 14, since the way we write this date, 3/14, looks just like Pi when rounded. In 2009, U. S. Congress voted to formally make March 14 Pi Day. Certain parts of the world—places where March 14 is written as 14/3—will instead celebrate Pi Approximation Day which takes place on July 22nd because of the division(除法) result of 22/7.
Pi has appeared in movies, comics, music, and more. “In modern movies, any time the filmmaker wants to create a sense of mystery, the symbol Pi is used,” says Blatner. People also love working to remember the digits(数位) of Pi and competing against others to see who can remember most. The Guinness World Record for remembering the most digits of Pi is held by Lu Chao of China, who successfully remembered Pi to nearly 67,000 decimal places.
Above all, Pi Day is about having fun with the number, according to Blatner. People will celebrate Pi Day by eating pie and throwing pie, and with fun Pi-related games. Princeton, New Jersey holds a series of Pi-related festivities. Events this year include a surprise birthday party for Albert Einstein whose birthday also falls on March 14, and a “Walk a Pi Event” where participants will walk 3.14 miles together. Just like the number itself, the possibilities for Pi Day are truly endless.
1.What makes Pi mysterious?
A. Ways to divide a circle B. Ways to use it when rounded
C. Being unable to write it as an expression D. Its endless decimal places
2.Why is Pi Day celebrated in some places on July 22nd?
A. Because it is announce formally B. Because it was corrected originally
C. Because the division result is similar to Pi D. Because that day is easier to remember
3.What is the goal of using Pi in films according to Blatner?
A. To move more viewers B. To call for viewers’ attention
C. To make the films more frightening D. To add something mysterious to the film
4.What can we learn from the text?
A. Lu Chao is the first Chinese to recite Pi
B. Many states in the USA celebrate Pi day on July 22nd
C. There are many different events to celebrate Pi Day in the world
D. Scientists will try their best to work out the digits of Pi thoroughly
九年级英语阅读单选中等难度题查看答案及解析
We know mosquitoes very well. Mosquitoes fly everywhere. They can be found almost all over the world, and there are more than 2,500 kinds of them.
No one likes mosquito. But the mosquito may decide if she loves you. She? Yes, she. The male(雄性) mosquito doesn’t bite! Only the female（雌性）mosquito bites because she needs blood（血）to lay eggs. She is always looking for things or people she wants to bite. If she likes what she finds, she bites. But if she doesn’t like your blood, she will turn to someone else for more delicious blood. Next time a mosquito bites you, just remember you are chosen. You’re different from others!
If the mosquito likes you, she lands on your body without letting you know. She bites you so quickly quietly that you may not feel anything different. After she bites , you will have an itch(痒) on your body because she puts something from her mouth together with your blood. When the itch begins, she has flown away.
And then what happens? Well, after her delicious dinner, the mosquito feels tired. She wants to find a place to have a good rest. There, in a tree or on a wall, she begins to lay eggs, hundreds of eggs.
根据短文内容，判断下列句子正误。正确为“T”，错误为“F”，并在答题卡上把“T”或“F”涂黑。
1.Mosquitoes means “蚊子” in Chinese.
2.All mosquitoes like to bite people for blood.
3.If a mosquito wants to bite you, it means she is very tired.
4.The mosquito bites you too quickly to let you know.
5.The itch begins after the mosquito flies away.
九年级英语阅读理解中等难度题查看答案及解析
A report says that the world’s natural gas deposits______ early in the future.
A.will be run out B.will use up
C.will run out D.will be cleaned up
九年级英语单项填空简单题查看答案及解析
We can see walls everywhere in the world .But the Great Wall of China is the biggest of all . The Chinese call it “ The Ten—Thousand—Li Great Wall”. It is in fact more than 6,000 kilometers long. It is 4-5 meters wide. In most places, five horses or ten men can walk side by side.
When you visit the Great Wall, you can’t help wondering how the Chinese people were able to build such a great wall thousands of years ago. Without any modern machines(机器), it was really very difficult to build it. They had to do all the work by hand . It took millions of men hundreds of years to build it.
The Great Wall has a history of over two thousand years. The kings began to build the first parts of it around two thousand seven hundred years ago. Then Qinshihuang had all the walls joined up. He thought that could keep the enemy(敌人) out of the country.
Today the Great Wall has become a place of interest. Not only Chinese people but also people from all over the world come to visit it. It is a Chinese saying, “A man who has never been to the Great Wall is not a real man.”
1. The Great Wall is the biggest wall in _______ _________.
2. It is more than six thousand _________ ___________.
3. Without any modern machines, people had to do all the work _______ _______.
4. Qinshihuang thought the Great Wall could keep the enemy _______ ________ his country.
Today _______ ________ Chinese people but also people all over the world come to visit it.
九年级英语其他题中等难度题查看答案及解析
We can see walls everywhere in the world .But the Great Wall of China is the biggest of all . The Chinese call it “ The Ten—Thousand—Li Great Wall”. It is in fact more than 6,000 kilometers long. It is 4-5 meters wide. In most places, five horses or ten men can walk side by side.
When you visit the Great Wall, you can’t help wondering how the Chinese people were able to build such a great wall thousands of years ago. Without any modern machines(机器), it was really very difficult to build it. They had to do all the work by hand . It took millions of men hundreds of years to build it.
The Great Wall has a history of over two thousand years. The kings began to build the first parts of it around two thousand seven hundred years ago. Then Qinshihuang had all the walls joined up. He thought that could keep the enemy(敌人) out of the country.
Today the Great Wall has become a place of interest. Not only Chinese people but also people from all over the world come to visit it. It is a Chinese saying, “A man who has never been to the Great Wall is not a real man.”
1.The Great Wall is the biggest wall in _______ _________.
2.It is more than six thousand _________ ___________.
3.Without any modern machines, people had to do all the work _______ _______.
4.Qinshihuang thought the Great Wall could keep the enemy _______ ________ his country.
5.Today _______ ________ Chinese people but also people all over the world come to visit it.
九年级英语阅读理解中等难度题查看答案及解析
We can see walls everywhere in the world .But the Great Wall of China is the biggest of all . The Chinese call it “ The Ten—Thousand—Li Great Wall”. It is in fact more than 6,000 kilometers long. It is 4-5 meters wide. In most places, five horses or ten men can walk side by side.
When you visit the Great Wall, you can’t help wondering how the Chinese people were able to build such a great wall thousands of years ago. Without any modern machines(机器), it was really very difficult to build it. They had to do all the work by hand . It took millions of men hundreds of years to build it.
The Great Wall has a history of over two thousand years. The kings began to build the first parts of it around two thousand seven hundred years ago. Then Qinshihuang had all the walls joined up. He thought that could keep the enemy(敌人) out of the country.
Today the Great Wall has become a place of interest. Not only Chinese people but also people from all over the world come to visit it. It is a Chinese saying, “A man who has never been to the Great Wall is not a real man.”
1.The Great Wall is the biggest wall in _______ _________.
2.It is more than six thousand _________ ___________.
3.Without any modern machines, people had to do all the work _______ _______.
4.Qinshihuang thought the Great Wall could keep the enemy _______ ________ his country.
5.Today _______ ________ Chinese people but also people all over the world come to visit it.
九年级英语阅读理解中等难度题查看答案及解析
Mosquitoes(蚊子)can be seen everywhere all over the world, especially in summer. And there are more than 2,500 kinds of them.
__43_likes the mosquito, but the mosquito may like you. She thinks your blood is delicious. She? Yes, she. It’s true that the male(雄性)mosquito doesn’t bite(咬)and only the female mosquito bites because she 44 blood(血液)to lay eggs. She is always 45 things or people she wants to bite. If she likes what she finds, she will bite. But if she doesn’t like your blood, she 46 to someone else for more delicious blood. Next time a mosquito bites you, just remember you’re different from others.
If the mosquito likes you, she will land on your body 47 letting you know. She bites you 48 quickly and quietly that you may feel nothing. After she bites, you will have an itch(痒)on your body because she puts something from her mouth together with your blood. By the time the itch begins, she has 49 .
And then what happens? Well, after her delicious 50 ,it’s dark. The mosquito feels51 . She just wants to find a place to have a good rest. There, on a leaf or a wall, she begins to lay eggs, 52 eggs.
1.A.Everyone B. No one C. Someone
2.A.needs B. need C. want
3.A.finding B. wants C. looking for
4.A.will turn B. turns to C. turn
5.A.with B. without C. after
6.A.so B. such C. very
7.A.flies away B. flew away C. flown away
8.A.breakfast B. dinner C. lunch
9.A.tiring B. tired C. relaxing
10.A.3 hundreds B. hundred of C. hundreds of
九年级英语完型填空简单题查看答案及解析
We know the mosquito very well. Mosquitoes fly everywhere. They can be found almost all over the world, and there are more than 2,500 kinds of them.
No one likes the mosquito. But the mosquito may decide that she loves you. She? Yes, she. It’s true that male mosquito doesn’t bite and only the female mosquito bites because she needs blood to lay eggs. She is always looking for things or people she wants to bite. If she likes what she finds, she bites. But if she doesn’t like your blood, she will turn to someone else for more delicious blood. Next time a mosquito bites you, just remember you are chosen. You’re different from the others!
If the mosquito likes you, she lands on your body without letting you know. She bites you so quickly and quietly that you may not feel anything different. After she bites, you will have an itch(痒) on your body because she puts something from her mouth together with your blood. By the time the itching begins, and she has flown away.
And then what happens? Well, after her delicious dinner, the mosquito feels tired. She just wants to find a place to have a good rest. There, on a leaf or a wall, she begins to lay eggs, hundreds of eggs.
1.“Mosquito” means _______ in Chinese.
A. 苍蝇 B. 蜻蜓 C. 跳蚤 D. 蚊子
2.We know mosquitoes very well because ___________.
A. they can be found easily
B. they fly here and there
C. there are many kinds of them
D. they can fly
3.If the mosquito doesn’t bite you, it will ________.
A. get angry with you B. be afraid of you
C. make a lot of noise D. choose another one
4.The mosquito bites you _________.
A. when you’re asleep
B. because you have choose it
C. too quickly to let you know
D. but doesn’t like you
5. Which of the following sentences is wrong?
A. The itching begins after the mosquito bites you.
B. You feel terrible when the mosquito bites you.
C. Mosquitoes use blood to lay eggs.
D. All the mosquitoes don’t like to bite people for blood.
九年级英语阅读理解中等难度题查看答案及解析
We know the mosquito very well. Mosquitoes fly everywhere. They can be found almost all over the world, and there are more than 2,500 kinds of them.
No one likes the mosquito. But the mosquito may decide that she loves you. She? Yes, she. It’s true that male mosquito doesn’t bite(咬)and only the female mosquito bites because she needs blood to lay eggs. She is always looking for things or people she wants to bite. If she likes what she finds, she bites. But if she doesn’ t like your blood, she will turn to someone else for more delicious blood. Next time a mosquito bites you, just remember you are chosen. You’re different from the others!
If the mosquito likes you, she lands on your body without letting you know. She bites you so quickly and quietly that you may not feel anything different. After she bites, you will have an itch(痒) on your body because she puts something from her mouth together with your blood. By the time the itching begins, and she has flown away.
And then what happens? Well, after her delicious dinner, the mosquito feels tired. She just wants to find a place to have a good rest. There, on a leaf or a wall, she begins to lay eggs, hundreds of eggs.
1.“Mosquito” means________in Chinese.
A.苍蝇 B.蜻蜓 C.跳蚤 D.蚊子
2.We know mosquitoes very well because________.
A.they fly here and there B.they bite us
C.there are many kinds of them D.they can fly
3.If the mosquito doesn’t bite you, it will________.
A.get angry with you B.be afraid of you C.make a lot of noise D.choose another one
4.The mosquito bites you________.
A.when you’re asleep B.because you have choose it
C.too quickly to let you know D.but doesn’t like you
5.Which of the following sentences is wrong?
A.The itching begins after the mosquito bites you.
B.You feel terrible when the mosquito bites you.
C.Mosquitoes use blood to lay eggs.
D.Not all the mosquitoes like to bite people for blood.
九年级英语阅读单选中等难度题查看答案及解析
We know the mosquito very well. Mosquitoes fly everywhere. They can be found almost all over the world, and there are more than 2,500 kinds of them.
No one likes the mosquito. But the mosquito may decide that she loves you. She? Yes, she. It’s true that male mosquito doesn’t bite(咬) and only the female(雌性的) mosquito bites because she needs blood to lay eggs. She is always looking for things or people she wants to bite. If she likes what she finds, she bites. But if she doesn’t like your blood, she will turn to someone else for more delicious blood. Next time a mosquito bites you, just remember you are chosen. You’re different from the others!
If the mosquito likes you, she lands on your body without letting you know. She bites you so quickly and quietly that you may not feel anything different. After she bites, you will have an itch(痒) on your body because she puts something from her mouth together with your blood. By the time the itching begins, and she has flown away.
And then what happens? Well, after her delicious dinner, the mosquito feels tired. She just wants to find a place to have a good rest. There, on a leaf or a wall, she begins to lay eggs, hundreds of eggs.
1.“Mosquito” means ______ in Chinese.
A. 苍蝇 B. 蜻蜓 C. 蜘蛛 D. 蚊子
2.If the mosquito doesn’t bite you, it will ________.
A. get angry with you B. be afraid of you
C. make a lot of noise D. choose another one
3. The mosquito bites you _________.
A. when you’re asleep B. because you have chosen it
C. too quickly to let you know D. but doesn’t like you
九年级英语阅读理解中等难度题查看答案及解析