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Tất cả Toán Vật lý Hóa học Sinh học Ngữ văn Tiếng anh Lịch sử Địa lý Tin học Công nghệ Giáo dục công dân Âm nhạc Mỹ thuật Tiếng anh thí điểm Lịch sử và Địa lý Thể dục Khoa học Tự nhiên và xã hội Đạo đức Thủ công Quốc phòng an ninh Tiếng việt Khoa học tự nhiên
Mua vip
PG
Phạm Gia Minh
18 tháng 2 2021 - olm
Câu hỏi hay
II. Read the following passage and fill in the gaps with one suitable word ( 5p) What is the truth about light wave theory? ……56……. many years, scientists were in disagreement. Newton hypothesized that light traveled ……57…….. in a denser medium, like a wave. On the other hand, Christian Huygens in 1690, postulated that light wave slowed down in a denser medium, like particles. The problem is that it was impossible to ………58……. the speed of light accurately. However, in 1850, Leon Foucault made the first accurate ……59…. His result supported the wave theory for light. The theory was accepted until the late 19th century when Einstein discovered that light striking a surface caused particles to …60…….. their speed. This marked a return to contradiction and disagreement.
#Tiếng anh lớp 9
7
VQ
Vũ Quang Bảo
19 tháng 2 2021
có làm mới có ăn
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NN
Nguyễn Ngọc Bảo trâm
19 tháng 2 2021
One and Huế sjihw bsygge
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PG
Phạm Gia Minh
18 tháng 2 2021
II. Read the following passage and fill in the gaps with one suitable word ( 5p) What is the truth about light wave theory? ……56……. many years, scientists were in disagreement. Newton hypothesized that light traveled ……57…….. in a denser medium, like a wave. On the other hand, Christian Huygens in 1690, postulated that light wave slowed down in a denser medium, like particles. The problem is that it was impossible to ………58……. the speed of light accurately. However, in...
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II. Read the following passage and fill in the gaps with one suitable word ( 5p) What is the truth about light wave theory? ……56……. many years, scientists were in disagreement. Newton hypothesized that light traveled ……57…….. in a denser medium, like a wave. On the other hand, Christian Huygens in 1690, postulated that light wave slowed down in a denser medium, like particles. The problem is that it was impossible to ………58……. the speed of light accurately. However, in 1850, Leon Foucault made the first accurate ……59…. His result supported the wave theory for light. The theory was accepted until the late 19th century when Einstein discovered that light striking a surface caused particles to …60…….. their speed. This marked a return to contradiction and disagreement.
#Tiếng anh lớp 9
0
DH
Đặng Huỳnh Trâm
19 tháng 9 2017
Help me. Choose the correct sentence from the four options A, B, C or D 1. A. Do you mind if I asked you a few questions? B. Would you mind if I asked you a few questions? C. Do you mind if I will ask you a few questions? D. Would you mind if I ask you a few questions? 2. A. The teacher suggests that her students write composition on their experiences with ESP. B. The teacher suggests her students to write composition about their experiences with ESP. C. The teacher...
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Help me.

Choose the correct sentence from the four options A, B, C or D

1. A. Do you mind if I asked you a few questions?

B. Would you mind if I asked you a few questions?

C. Do you mind if I will ask you a few questions?

D. Would you mind if I ask you a few questions?

2. A. The teacher suggests that her students write composition on their experiences with ESP.

B. The teacher suggests her students to write composition about their experiences with ESP.

C. The teacher suggests that her students wrote composition of his or her experiences with ESP.

D. The teacher suggests that her students will write composition for their experiences with ESP.

3. A. The tests in this book are in order of difficult.

B. The tests of this book are orderly of difficult.

C. The tests of this book are in order of difficulty.

D. The tests in this book are in order of difficulty.

4. A. That you get high grades in school is necessary.

B. It's necessary for you to getting high grades in school.

C. That you will get high grades in school are necessary.

D. It's necessary that you can get high grades in school.

5. A. The light buld was invented by Edison, he discovered other new things.

B. After the light buld was invented, Edison discovered other new things.

C. Having invented the light buld, Edison went on to make new discoveries.

D. Having invented the light buld, new discoveries were made by Edison.
#Tiếng anh lớp 9
2
S
_silverlining
19 tháng 9 2017

Choose the correct sentence from the four options A, B, C or D

1. A. Do you mind if I asked you a few questions?

B. Would you mind if I asked you a few questions?

C. Do you mind if I will ask you a few questions?

D. Would you mind if I ask you a few questions?

2. A. The teacher suggests that her students write composition on their experiences with ESP.

B. The teacher suggests her students to write composition about their experiences with ESP.

C. The teacher suggests that her students wrote composition of his or her experiences with ESP.

D. The teacher suggests that her students will write composition for their experiences with ESP.

3. A. The tests in this book are in order of difficult.

B. The tests of this book are orderly of difficult.

C. The tests of this book are in order of difficulty.

D. The tests in this book are in order of difficulty.

4. A. That you get high grades in school is necessary.

B. It's necessary for you to getting high grades in school.

C. That you will get high grades in school are necessary.

D. It's necessary that you can get high grades in school.

5. A. The light buld was invented by Edison, he discovered other new things.

B. After the light buld was invented, Edison discovered other new things.

C. Having invented the light buld, Edison went on to make new discoveries.

D. Having invented the light buld, new discoveries were made by Edison.

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QB
Quyên Bùi
27 tháng 9 2017

1. B

2. A

3. D

4. D

5. D

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DM
Dương Minh
26 tháng 2 2017
Read the text then choose the best option to answer the questionLong ago a lot of people thought the moon was God. Other people thought it was just a light in the sky. And others thought it was a big ball cheese!The telescopes were made. And men saw that the moon was really another world. They wondered what it was like. They dreamed of going there.On July 20th, 1969, that dream came true. Two American men landed on the moon. Their names were Neil Armstrong and Edwin Aldrin. The first thing the...
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Read the text then choose the best option to answer the question

Long ago a lot of people thought the moon was God. Other people thought it was just a light in the sky. And others thought it was a big ball cheese!

The telescopes were made. And men saw that the moon was really another world. They wondered what it was like. They dreamed of going there.

On July 20th, 1969, that dream came true. Two American men landed on the moon. Their names were Neil Armstrong and Edwin Aldrin. The first thing the men found was that the moon is covered with dust. The dust is so thick that the men left footprints where they walked. Those were the first marks a living thing had ever made on the moon. And they could stay there for years and years. There is no wind or rain to wipe them off.

The two men walked on the moo for hours. They picked up rocks to bring back to earth for study. They dug up dirt to bring back. They set up machines to find out things people wanted to know. Then they climbed back into their moon landing craft.

This story tells …………….

Next day the landing craft roared as the men took off the moon. They joined Michael Collins in the spaceship that wait for them above the moon. Then they were off on their long trip back to earth.

Behind them they left the plains and tall mountains of the moon. They left the machines they had set up.

 

And they left footprints that may last forever.

A. about the first men to walk in the moon

B. how men found footprints on the moon

C. what the men brought back from their trip to the moon

D. who had left footprints on the moon before the two men landed there.
#Tiếng anh lớp 9
1
NH
Nguyen Hoang Hai
26 tháng 2 2017

Đáp án: A

Dịch: Bài đọc nói về những người đầu tiên đặt chân lên mặt trăng.

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LT
le thu
2 tháng 5 2019 - olm
Long ago a lot of people thought the moon was good. Other people thought it was just a light in the sky. And some thought it was a big ball of cheese!      The telescopes were made. And men saw that the moon was really anther world. They wondered what it was like.They dreamed of going there. On July 20th 1969, that dream came true.Two American men landed on the moon. Their names were Nei Armstrong and Edwin Aldrin. The first thing the men found was that the moon is covered with dust. The...
Đọc tiếp

Long ago a lot of people thought the moon was good. Other people thought it was just a light in the sky. And some thought it was a big ball of cheese!

      The telescopes were made. And men saw that the moon was really anther world. They wondered what it was like.They dreamed of going there. On July 20th 1969, that dream came true.Two American men landed on the moon. Their names were Nei Armstrong and Edwin Aldrin. The first thing the men found was that the moon is covered with dust. The dust is so thick that the men left footprints where they walk. Those were the first marks  living thing had ever made on the moon. And they could stay there for years and years. There is no wind or rain to wipe them off.

The two men waliked on the moon for two hours. They picked up rocks to bring back to earth to study. They dug up dirt to bring back. They set up machines to find out things people wanted to know.Then they climbed back into their moon landing craft.

  1. What did some people think that the moon was?
  2. When did two A merican men land on the moon?
  3. What was the first things that the two men found in the moon?
  4. How thick is the dust?
  5. Is there any water on the moon?
  6. Did the two men walk on the moon for years and years?
#Tiếng anh lớp 9
1
PT
Phạm Thị Minh Hạnh
4 tháng 5 2019

1. They thought that the moon was god, a light in the sky and a big ball of cheese.

2. On July 20th 1969.

3. The dust

4. It is so thick that the men left footprints where they walk.

5. No.

6. No. 

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Z
๖ۣۜҨž乡Trầnミ★Hoàngミ★Việt★彡
14 tháng 5 2018 - olm
 Fill in each blank with one suitable word.Energy is one of the problems that many people are interested in. It is not an unfamiliar word. It is heard, said, discussed day after day. It is close to everyone's (29)____________ life. You turn on the lamp and it is energy that gives you light. You turn on a TV and it is energy that gives you pictures and sound. You ride a motorcycle and it is energy that gives you movement. You (30)__________ your meals and it is energy that gives you heat to...
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 Fill in each blank with one suitable word.

Energy is one of the problems that many people are interested in. It is not an unfamiliar word. It is heard, said, discussed day after day. It is close to everyone's (29)____________ life. You turn on the lamp and it is energy that gives you light. You turn on a TV and it is energy that gives you pictures and sound. You ride a motorcycle and it is energy that gives you movement. You (30)__________ your meals and it is energy that gives you heat to boil rice.

The problem is that the demand for energy is rising and that the price of energy isgetting (31)__________ and higher. The supply of energy on earth is limited. It cannot provide us all forever. The shortage of energy in the future is inevitable. Therefore, (32)__________ energy is a must if we want to continue to live in a safe and sound world.

help me
#Tiếng anh lớp 9
1
NN
Nguyễn Nhật Minh
20 tháng 5 2018

Fill in each blank with one suitable word.

Energy is one of the problems that many people are interested in. It is not an unfamiliar word. It is heard, said, discussed day after day. It is close to everyone's (29)daily life. You turn on the lamp and it is energy that gives you light. You turn on a TV and it is energy that gives you pictures and sound. You ride a motorcycle and it is energy that gives you movement. You (30)cook your meals and it is energy that gives you heat to boil rice.

The problem is that the demand for energy is rising and that the price of energy isgetting (31)higher and higher. The supply of energy on earth is limited. It cannot provide us all forever. The shortage of energy in the future is inevitable. Therefore, (32)saving energy is a must if we want to continue to live in a safe and sound world.

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K
kkkkkkkkkkkk
1 tháng 1 2020
Read the passage and fill each gap with one suitable word Christiaan Huygens spends Christmas day, in the Hague in 1656, contructing a model of a clock on a new principle. The principle ______ hes been observed by Galileo, traditionally as a result of watching a lamp swing to and fro in the cathedral when he is a student in Pisa. Galileo later proves experimentally that a swinging supspended object takes the ______ time to complete each swing regardless of how far it travels. ...
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Read the passage and fill each gap with one suitable word

Christiaan Huygens spends Christmas day, in the Hague in 1656, contructing a model of a clock on a new principle. The principle ______ hes been observed by Galileo, traditionally as a result of watching a lamp swing to and fro in the cathedral when he is a student in Pisa. Galileo later proves experimentally that a swinging supspended object takes the ______ time to complete each swing regardless of how far it travels.

This consistency prompts Galileo to suggest that a pendulum might bu useful in clock. But no one has been able to apply that insight, until Huygens______ that his model works.

A craftsman in the Hague makes the first full-scale clock on this principle for Huygens in 1657. But it is England______ the idea is taken up with the greatest enthusiasm.

By 1600 London clockmakers have already developed the characteristic shape which makes______ use of the new mechanism - that of the longcase clock, more affectionately known as the grandfather clock

#Tiếng anh lớp 9
4
HT
Hoàng Thúy An
1 tháng 1 2020

1 itself

2 same

3 finds

4 that

5 best

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NT
nguyễn thị thiên thiên
1 tháng 1 2020

1.itself

2.same

3.finds

4.that

5.best

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DM
Dương Minh
14 tháng 1 2019
Read the passage and answer the questions.Thomas A. Edison was born in Milan, Ohio, on February 11th, 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months. His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity led him to start experimenting at a young age.Thomas Alve Edison lit up the world with his invention of the electric light. Although the electric light...
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Read the passage and answer the questions.

Thomas A. Edison was born in Milan, Ohio, on February 11th, 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months. His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity led him to start experimenting at a young age.

Thomas Alve Edison lit up the world with his invention of the electric light. Although the electric light seems to be the most useful, it was not his only invention. He also invented the record player, the motion picture camera, and over 1,200 other things. About every two weeks he created something new.

He worked 16 out of every 24 hours. Sometimes he worked so intensely that his wife had reminded him to sleep and eat.

Thomas Edison died at the age of 84 on October 18th, 1931, at his estate in West Orange, New Jersey. He left numerous inventions that improved the quality of life all over the world.

How did Thomas Edison light up the world?
#Tiếng anh lớp 9
1
NH
Nguyen Hoang Hai
14 tháng 1 2019

He invented the eletric light.

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DM
Dương Minh
15 tháng 6 2018
Read the passage and answer the questions.Thomas A. Edison was born in Milan, Ohio, on February 11th, 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months. His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity led him to start experimenting at a young age.Thomas Alve Edison lit up the world with his invention of the electric light. Although the electric light...
Đọc tiếp

Read the passage and answer the questions.

Thomas A. Edison was born in Milan, Ohio, on February 11th, 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months. His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity led him to start experimenting at a young age.

Thomas Alve Edison lit up the world with his invention of the electric light. Although the electric light seems to be the most useful, it was not his only invention. He also invented the record player, the motion picture camera, and over 1,200 other things. About every two weeks he created something new.

He worked 16 out of every 24 hours. Sometimes he worked so intensely that his wife had reminded him to sleep and eat.

Thomas Edison died at the age of 84 on October 18th, 1931, at his estate in West Orange, New Jersey. He left numerous inventions that improved the quality of life all over the world.

Question: How did Thomas Edison light up the world?
#Tiếng anh lớp 9
1
NH
Nguyen Hoang Hai
15 tháng 6 2018

Đáp án: He invented the eletric light.

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K
Kfkfj
31 tháng 8 2017
Điền từ vào ô trống Manned space-craft travel at speeds of almost five miles a second. But space-craft are slow.....with the fastest traveler in the .....universe-light. Scientists calculate that light travels 186000 miles a second! Swift ......it is, light takes time to cross interstellar space. Light from Sirius, a neighboring star, travels for nine years to......us. Because of the time lights takes to travel the........of space, it is possible to "see" an event long........is...
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Điền từ vào ô trống

Manned space-craft travel at speeds of almost five miles a second. But space-craft are slow.....with the fastest traveler in the .....universe-light. Scientists calculate that light travels 186000 miles a second!

Swift ......it is, light takes time to cross interstellar space. Light from Sirius, a neighboring star, travels for nine years to......us.

Because of the time lights takes to travel the........of space, it is possible to "see" an event long........is has happened. In AD 1054, Chinese astronauts recorded the...... of an object that .... up the night sky. They were seeing an exploding star. Yet scientists today calculate that the stars ........ more than four thousand years ago. ......... the Chinese observers, we too may "see" happening vast distances away and long before our own time.
#Tiếng anh lớp 9
3
CL
Chippy Linh
31 tháng 8 2017

Điền từ vào ô trống

Manned space-craft travel at speeds of almost five miles a second. But space-craft are slow..compared...with the fastest traveler in the ..known...universe-light. Scientists calculate that light travels 186000 miles a second!

Swift ....as..it is, light takes time to cross interstellar space. Light from Sirius, a neighboring star, travels for nine years to...reach...us.

Because of the time lights takes to travel the....distance....of space, it is possible to "see" an event long.....after...is has happened. In AD 1054, Chinese astronauts recorded the..appearance.... of an object that ..lit.. up the night sky. They were seeing an exploding star. Yet scientists today calculate that the stars ...exploded..... more than four thousand years ago. .....Like.... the Chinese observers, we too may "see" happening vast distances away and long before our own time.

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HT
Huy Thắng Nguyễn
31 tháng 8 2017

Điền từ vào ô trống

Manned space-craft travel at speeds of almost five miles a second. But space-craft are slow..compared...with the fastest traveler in the ...observable..universe-light. Scientists calculate that light travels 186000 miles a second!

Swift ...as...it is, light takes time to cross interstellar space. Light from Sirius, a neighboring star, travels for nine years to...reach...us.

Because of the time lights takes to travel the....distance....of space, it is possible to "see" an event long.....after...is has happened. In AD 1054, Chinese astronauts recorded the...appearance... of an object that ..lit.. up the night sky. They were seeing an exploding star. Yet scientists today calculate that the stars ...exploded..... more than four thousand years ago. ....​Like.... the Chinese observers, we too may "see" happening vast distances away and long before our own time.

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DP
Dũng Phạm
18 tháng 11 2019
Thomas Edison was born in Milan, Ohio,on 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months.His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity led him to start experimenting at ayoung age. Thomas Edison lit up the world with his invention of the electric light. Although The electric light was the most useful, it was not his only invention. He also...
Đọc tiếp

Thomas Edison was born in Milan, Ohio,on 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months.His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity led him to start experimenting at ayoung age.
Thomas Edison lit up the world with his invention of the electric light. Although The electric light was the most useful, it was not his only invention. He also invented the record player, the motion picture camera. and over 1,200 other things. About every two weeks he created something new.He worked 16 out of every 24 hours. Sometimes he worked so intensely that his wife had to remind him to sleep eat.
Thomas Edison died in 1931, in West Orange, New Jersey. He left numerous inventions that improved quality of life all over the world

1. When and where was Edison born?

2. How did Thomas Edison light up the world?

3. How often did Edison light up the world?

4. Was Edition mostly self-educated?
#Tiếng anh lớp 9
2
VN
Vũ Như Quỳnh
18 tháng 11 2019

Thomas Edison was born in Milan, Ohio,on 1847. His family moved to Port Huron, Michigan, when he was seven years old. Surprisingly, he attended school for only two months.His mother, a former teacher, taught him a few things, but Thomas was mostly self-educated. His natural curiosity led him to start experimenting at ayoung age.
Thomas Edison lit up the world with his invention of the electric light. Although The electric light was the most useful, it was not his only invention. He also invented the record player, the motion picture camera. and over 1,200 other things. About every two weeks he created something new.He worked 16 out of every 24 hours. Sometimes he worked so intensely that his wife had to remind him to sleep eat.
Thomas Edison died in 1931, in West Orange, New Jersey. He left numerous inventions that improved quality of life all over the world

1. When and where was Edison born?

Thomas Edison was born in Milan, Ohio,on 1847.

2. How did Thomas Edison light up the world?

He lighted up the world with his invention of the electric light.

3. How often did Edison light up the world?

About every two weeks

4. Was Edition mostly self-educated?

Yes , he was

#Yumi

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PT
Phúc Trần
18 tháng 11 2019

1. Thomas Edison was born in Milan, Ohio, on 1847

2. He invited the electric light

3. About every two weeks

4. Sửa lại Edition thành Edison bạn nha.

Yes, he was, he was mostly self-educated

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