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Một người đàn ông tên Arthur Eddington đã giúp biến Einstein thành một ngôi sao - bằng cách sử dụng các ngôi sao! Đầu tiên Einstein dự đoán rằng khối lượng sẽ bẻ cong không gian và kết quả là đường đi của ánh sáng. Ý tưởng này là một phần của Lý thuyết tương đối tổng quát của ông.
Năm 1919, Eddington đã sử dụng các quan sát để kiểm tra ý tưởng của Einstein trong nhật thực, khi ông có thể đo được vị trí của các ngôi sao theo hướng Mặt trời. Eddington thấy rằng vị trí ban ngày và ban đêm của các ngôi sao dường như khác nhau! Tại sao? Mặt trời tập trung không gian để uốn cong và ánh sao chiếu theo con đường của không gian bị uốn cong. Thí nghiệm này đã chứng minh rằng dự đoán uốn cong ánh sáng của Einstein là đúng, và nó khiến ông nổi tiếng khắp thế giới!
In 1783, two French brothers built the first balloon to take people into the air. One hundred and twenty years .later.., in 1903, the Wright brothers built the first plane with an engine and flew in it. This was .in.. the United States. Then, in 1918, the US Post Office began the first airmail service.
Aeroplanes changed a lot in the next thirty years. Then, in the 1950s, aeroplanes became much .faster.. because they had jet engines.
In 1976, Concorde was built in the UK and France. It was the fastest passenger plane in the world at that time and it .can.. fly at 2300 kilometres an hour, so the journey from London to Newyork was only four hours.
Today, millions of people travel .by.. aeroplane, and it is difficult to think of a world without them.
The first ______man ___ went into space about 40 years ago, and some people went to the moon about 8 years later.
Since the beginning of this century, .....tooth.... decay has greatly increased. The amount .....of...... sugar in our food has also increased Doctors and dentists now know that .......sugar....... is the chief cause the tooth .......decay........ Eskimos's teeth, for example, started to .....decay....... when they began to eat sweet ...........food............. Long ago doctors did not like .......to....... treat people's teeth. Babers and blacksmiths .......looked....... after people's teeth and pulled them .......out...... when they decayed. Some people thought.........toothache....... was a punishment from the gods.
Do you think the Maori system is a good idea? Why?/ Why not?
=> Yes , I do. Because it helps young people to change their behaviour, it tries to bring something positive from a negative situation, and most of the time it succeeds.
Đúng ra phải có từ 50 -> 70 từ cơ.
Mình làm được 1 bài rồi nhưng muốn tham khảo thêm bài các bạn.
I think the Maori system is a good idea because it can educate young people without violence. That way won't give any bad memory to the youth. The youth will learn how to say sorry to other people. But some young wouldn't understand. They still think their actions are correct. Or because they don't afraid of saying sorry. They still do it after they have apologised. So I think Maori people should have a stricter system.
Read the passage and write ONE suitable word for each space.
Many people nowadays have to wear false teeth when they was middle-aged.
Since the beginning of this century,(1) tooth decay has greatly increased. The amount(2) of sugar in our food has also increased Doctors and dentists now know that(3) sugar is the chief cause of tooth(4) decay Eskimos' teeth, for example, started to(5) decay when they began to eat sweet(6) food
Long ago doctors did not like(7) to treat people's teeth. Barbers and blacksmiths(8) looked after people's teeth and pulled them(9) out when they decayed. Some people thought(10) toothache was a punishment from the gods.
For thousand of years people have (0) wanted to know more about space. In ancient Babylon people (1) __ studied___ the sun and the stars. The ancient Egyptians used the stars to tell the time. In 1609, the Intalian scientist Galileo was the first person to study the moon and stars through a telescope. But when did people actually begin to (2) __explore__ space ?
Space exploration might not have been (3) ___successful__ without an ancient Chinese invention : (4) _fireworks ___ . the Chinese filled sticks with (5) __gunpowder ____ . When the first rockets. In 1898, Russian scientist Konstantin Tsiolkovsky said that people world worked on rockets. On October 4th 1957, a Russian team used a rocket to send the first (6) __satellite___ into space. When this trip was studied, they decided to send a dog into space. On November 3rd 1957, a dog named Laika became the first living creature to travel into space. Sadly, Laika đie before the rocket returned to Earth