improve your English learning By solving Physics, the idea is easy, but can you solve it?
it is common to use the reflection of sonar to determine the depth of the sea Suppose a ship emits an ultrasound and picks up its reflected sound from the seabed after 1 second approximation of the depth of the seabed given the velocity Ultrasonic in water is 1,500 meters per second.
Good luck. (Answer in English )
Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions.
As viewed from space, Earth’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million kilometers (93 million miles), Earth is the third planet from the Sun and the fifth largest planet in the solar system.
Our planet’s rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Earth’s atmosphere protects us from meteors as well, most of which burn up in the Earth’s atmosphere before they can strike the surface. The planet active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it formed about 4.6 billion years ago. The Earth has a single natural satellite – the moon.
Question: The main idea of this passage is that ________.
A. Earth is predominantly water.
B. There are life-supporting characteristics on Eart
C. Earth is the only planet with a moon
D. Earth has no common characteristics with other planets
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Every four years the world watches the Olympic Games, which start when somebody from the host country carries a torch into the stadium and lights the flame in the opening ceremony. The flame continues to burn throughout the games until it is extinguished in the closing ceremony.
This is a tradition that started in ancient Greece, when a fire burnt throughout the ancient Olympics, but it was not introduced to the modern games until 1928. The modern world welcomed the idea of an Olympic flame with enthusiasm. In 1936, Carl Diem, a German sports official, came up with the idea of an Olympic torch relay for the 1936 Summer Olympics in Berlin. Since then the torch relay has been part of the Olympic Games.
The Olympic torch is lit many months before the opening ceremony at Olympia, the site of the ancient Olympics in Greece. Eleven women take part and one of them lights the torch from the sun using a special mirror. After this, there is a ceremony in the Athenian Panathmaiko Stadium, where the Athens city authorities deliver the torch to the officials of the host city.
This ceremony is then followed by the torch relay. Traditionally, runners, including athletes, celebrities and ordinary people carry the torch on a journey from Athens to the host city. The relay lasts for many months and goes through many countries. Sometimes the torch travels by boat, or by plane.
The relay ends when the torch arrives at the Olympic stadium where the Games will take place. The final carrier of the torch is often kept secret until the last moment, and is usually a famous sportsman or woman. They run around the track and towards a huge cauldron, which is usually at the top of a staircase. They use the torch to light the Olympic flame.
The torch relay represents the passing of Olympic traditions from one generation to the next. Originally, the flame represented the “endeavour for protection and struggle for victory". Since it was introduced again in 1928, it has come to represent “the light of spirit, knowledge, and life”.
Question: Which of the followings can be the best title of the passage?
A. The Olympic Games
B. The Olympic Flame
C. The Olympic Opening Ceremony
D. The Olympic Closing Ceremony
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Since water is the basis of life, composing the greater part of the tissues of all living things, the crucial problem of desert animals is to survive in a world where sources of flowing water are rare. And since man’s inexorable necessity is to absorb large quantities of water at frequent intervals, he can scarcely comprehend that many creatures of the desert pass their entire lives without a single drop.
Uncompromising as it is, the desert has not eliminated life but only those forms unable to withstand its desiccating effects. No moist- skinned, water-loving animals can exist there. Few large animals are found. The giants of the North American desert are the deer, the coyote, and the bobcat. Since desert country is open, it holds more swift-footed running and leaping creatures than the tangled forest. Its population is largely nocturnal, silent, filled with reticence, and ruled by stealth. Yet they are not emaciated. Having adapted to their austere environment, they are as healthy as animals anywhere else in the word. The secret of their adjustment lies in the combination of behavior and physiology. None could survive if, like mad dogs and Englishmen, they went out in the midday sun; many would die in a matter of minutes. So most of them pass the burning hours asleep in cool, humid burrows underneath the ground, emerging to hunt only by night. The surface of the sun-baked desert averages around 150 degrees, but 18 inches down the temperature is only 60 degrees.
Question: We can infer from the passage that
A. healthy animals live longer lives
B. living things adjust to their environment
C. desert life is colorful and diverse
D. water is the basis of desert life
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Every four years the world watches the Olympic Games, which start when somebody from the host country carries a torch into the stadium and lights the flame in the opening ceremony. The flame continues to burn throughout the games until it is extinguished in the closing ceremony.
This is a tradition that started in ancient Greece, when a fire burnt throughout the ancient Olympics, but it was not introduced to the modern games until 1928. The modern world welcomed the idea of an Olympic flame with enthusiasm. In 1936, Carl Diem, a German sports official, came up with the idea of an Olympic torch relay for the 1936 Summer Olympics in Berlin. Since then the torch relay has been part of the Olympic Games.
The Olympic torch is lit many months before the opening ceremony at Olympia, the site of the ancient Olympics in Greece. Eleven women take part and one of them lights the torch from the sun using a special mirror. After this, there is a ceremony in the Athenian Panathmaiko Stadium, where the Athens city authorities deliver the torch to the officials of the host city.
This ceremony is then followed by the torch relay. Traditionally, runners, including athletes, celebrities and ordinary people carry the torch on a journey from Athens to the host city. The relay lasts for many months and goes through many countries. Sometimes the torch travels by boat, or by plane.
The relay ends when the torch arrives at the Olympic stadium where the Games will take place. The final carrier of the torch is often kept secret until the last moment, and is usually a famous sportsman or woman. They run around the track and towards a huge cauldron, which is usually at the top of a staircase. They use the torch to light the Olympic flame.
The torch relay represents the passing of Olympic traditions from one generation to the next. Originally, the flame represented the “endeavour for protection and struggle for victory". Since it was introduced again in 1928, it has come to represent “the light of spirit, knowledge, and life”.
Question: The word “extinguished” in paragraph 1 is closest in meaning to _______.
A. taken out
B. put out
C. watched out
D. gone out
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Every four years the world watches the Olympic Games, which start when somebody from the host country carries a torch into the stadium and lights the flame in the opening ceremony. The flame continues to burn throughout the games until it is extinguished in the closing ceremony.
This is a tradition that started in ancient Greece, when a fire burnt throughout the ancient Olympics, but it was not introduced to the modern games until 1928. The modern world welcomed the idea of an Olympic flame with enthusiasm. In 1936, Carl Diem, a German sports official, came up with the idea of an Olympic torch relay for the 1936 Summer Olympics in Berlin. Since then the torch relay has been part of the Olympic Games.
The Olympic torch is lit many months before the opening ceremony at Olympia, the site of the ancient Olympics in Greece. Eleven women take part and one of them lights the torch from the sun using a special mirror. After this, there is a ceremony in the Athenian Panathmaiko Stadium, where the Athens city authorities deliver the torch to the officials of the host city.
This ceremony is then followed by the torch relay. Traditionally, runners, including athletes, celebrities and ordinary people carry the torch on a journey from Athens to the host city. The relay lasts for many months and goes through many countries. Sometimes the torch travels by boat, or by plane.
The relay ends when the torch arrives at the Olympic stadium where the Games will take place. The final carrier of the torch is often kept secret until the last moment, and is usually a famous sportsman or woman. They run around the track and towards a huge cauldron, which is usually at the top of a staircase. They use the torch to light the Olympic flame.
The torch relay represents the passing of Olympic traditions from one generation to the next. Originally, the flame represented the “endeavour for protection and struggle for victory". Since it was introduced again in 1928, it has come to represent “the light of spirit, knowledge, and life”.
Question: It is stated in paragraph 3 that the Olympic torch _______.
A. is lit by using the sun’s energy
B. is lit a short time before the opening ceremony
C. is lit by a group of women in a special way
D. is lit from a burning flame at Olympia
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Every four years the world watches the Olympic Games, which start when somebody from the host country carries a torch into the stadium and lights the flame in the opening ceremony. The flame continues to burn throughout the games until it is extinguished in the closing ceremony.
This is a tradition that started in ancient Greece, when a fire burnt throughout the ancient Olympics, but it was not introduced to the modern games until 1928. The modern world welcomed the idea of an Olympic flame with enthusiasm. In 1936, Carl Diem, a German sports official, came up with the idea of an Olympic torch relay for the 1936 Summer Olympics in Berlin. Since then the torch relay has been part of the Olympic Games.
The Olympic torch is lit many months before the opening ceremony at Olympia, the site of the ancient Olympics in Greece. Eleven women take part and one of them lights the torch from the sun using a special mirror. After this, there is a ceremony in the Athenian Panathmaiko Stadium, where the Athens city authorities deliver the torch to the officials of the host city.
This ceremony is then followed by the torch relay. Traditionally, runners, including athletes, celebrities and ordinary people carry the torch on a journey from Athens to the host city. The relay lasts for many months and goes through many countries. Sometimes the torch travels by boat, or by plane.
The relay ends when the torch arrives at the Olympic stadium where the Games will take place. The final carrier of the torch is often kept secret until the last moment, and is usually a famous sportsman or woman. They run around the track and towards a huge cauldron, which is usually at the top of a staircase. They use the torch to light the Olympic flame.
The torch relay represents the passing of Olympic traditions from one generation to the next. Originally, the flame represented the “endeavour for protection and struggle for victory". Since it was introduced again in 1928, it has come to represent “the light of spirit, knowledge, and life”.
Question: The word “originally” in the last paragraph is closest in meaning to _______.
A. at once
B. at last
C. at first
D. at ease
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Every four years the world watches the Olympic Games, which start when somebody from the host country carries a torch into the stadium and lights the flame in the opening ceremony. The flame continues to burn throughout the games until it is extinguished in the closing ceremony.
This is a tradition that started in ancient Greece, when a fire burnt throughout the ancient Olympics, but it was not introduced to the modern games until 1928. The modern world welcomed the idea of an Olympic flame with enthusiasm. In 1936, Carl Diem, a German sports official, came up with the idea of an Olympic torch relay for the 1936 Summer Olympics in Berlin. Since then the torch relay has been part of the Olympic Games.
The Olympic torch is lit many months before the opening ceremony at Olympia, the site of the ancient Olympics in Greece. Eleven women take part and one of them lights the torch from the sun using a special mirror. After this, there is a ceremony in the Athenian Panathmaiko Stadium, where the Athens city authorities deliver the torch to the officials of the host city.
This ceremony is then followed by the torch relay. Traditionally, runners, including athletes, celebrities and ordinary people carry the torch on a journey from Athens to the host city. The relay lasts for many months and goes through many countries. Sometimes the torch travels by boat, or by plane.
The relay ends when the torch arrives at the Olympic stadium where the Games will take place. The final carrier of the torch is often kept secret until the last moment, and is usually a famous sportsman or woman. They run around the track and towards a huge cauldron, which is usually at the top of a staircase. They use the torch to light the Olympic flame.
The torch relay represents the passing of Olympic traditions from one generation to the next. Originally, the flame represented the “endeavour for protection and struggle for victory". Since it was introduced again in 1928, it has come to represent “the light of spirit, knowledge, and life”.
Question: The word “it” in paragraph 2 refers to _______.
A. the ancient Olympics
B. ancient Greece
C. the modern Olympics
D. the tradition of burning a fire
Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions.
As viewed from space, Earth’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million kilometers (93 million miles), Earth is the third planet from the Sun and the fifth largest planet in the solar system.
Our planet’s rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Earth’s atmosphere protects us from meteors as well, most of which burn up in the Earth’s atmosphere before they can strike the surface. The planet active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it formed about 4.6 billion years ago. The Earth has a single natural satellite – the moon.
Question: The word distinguishing as it is used in this selection means ________.
A. elevating in nature
B. characteristics like all other planets
C. devastating in nature
D. characteristics that set it apart from other planets
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Every four years the world watches the Olympic Games, which start when somebody from the host country carries a torch into the stadium and lights the flame in the opening ceremony. The flame continues to burn throughout the games until it is extinguished in the closing ceremony.
This is a tradition that started in ancient Greece, when a fire burnt throughout the ancient Olympics, but it was not introduced to the modern games until 1928. The modern world welcomed the idea of an Olympic flame with enthusiasm. In 1936, Carl Diem, a German sports official, came up with the idea of an Olympic torch relay for the 1936 Summer Olympics in Berlin. Since then the torch relay has been part of the Olympic Games.
The Olympic torch is lit many months before the opening ceremony at Olympia, the site of the ancient Olympics in Greece. Eleven women take part and one of them lights the torch from the sun using a special mirror. After this, there is a ceremony in the Athenian Panathmaiko Stadium, where the Athens city authorities deliver the torch to the officials of the host city.
This ceremony is then followed by the torch relay. Traditionally, runners, including athletes, celebrities and ordinary people carry the torch on a journey from Athens to the host city. The relay lasts for many months and goes through many countries. Sometimes the torch travels by boat, or by plane.
The relay ends when the torch arrives at the Olympic stadium where the Games will take place. The final carrier of the torch is often kept secret until the last moment, and is usually a famous sportsman or woman. They run around the track and towards a huge cauldron, which is usually at the top of a staircase. They use the torch to light the Olympic flame.
The torch relay represents the passing of Olympic traditions from one generation to the next. Originally, the flame represented the “endeavour for protection and struggle for victory". Since it was introduced again in 1928, it has come to represent “the light of spirit, knowledge, and life”.
Question: Which of the following statements is NOT TRUE about the Olympic torch?
A. The torch relay has been part of the Olympics since 1936.
B. The final torch carrier is often unknown until the last moment.
C. The torch relay ends at the stadium where the Olympics is held.
D. The torch is not traditionally carried by ordinary people.
