Đáp án là A. A thunder => thunder, vì Thunder : sấm, là danh từ không đếm được, nên không dùng mạo từ “a”
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* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. Although thunder and lightning are produced at the same time, light waves travel faster________, so we see the lightning before we hear the thunder. A. do sound waves B. than sound waves are C. than sound waves do D. sound waves
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* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Although thunder and lightning are produced at the same time, light waves travel faster________, so we see the lightning before we hear the thunder.
A. do sound waves
B. than sound waves are
C. than sound waves do
D. sound waves
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. Question 8: Although thunder and lightning are produced at the same time, light waves travel faster _____, so we see the lightening before we hear the thunder. A. than sound waves do B. than sound waves are C. do sound waves D. sound waves
Đọc tiếp
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
Question 8: Although thunder and lightning are produced at the same time, light waves travel faster _____, so we see the lightening before we hear the thunder.
A. than sound waves do
B. than sound waves are
C. do sound waves
D. sound waves
Although thunder and lightning are produced at the same time, light waves travel faster________, so we see the lightning before we hear the thunder
A. do sound waves
B. than sound waves are
C. than sound waves do
D. sound waves
Although thunder and lightning are produced at the same time, light waves travel faster _______, so we see the lightening before we hear the thunder
A. than sound waves do
B. than sound waves are
C. do sound waves
D. sound waves
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 questionsThree mile island nuclear power plantAmerica’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events th...
Đọc tiếp
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
Three mile island nuclear power plant
America’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events that would change the way America thought about nuclear power.
Within ten seconds after the flow of water was blocked, the reactor vessel became hotter and the pressure rose. Safety control rods were automatically thrust down into the reactor, causing the chain reaction to stop completely. Pressure, however, continued to build. A relief valve opened but failed to close. As a result, too much water escaped, and the reactor began to melt down.
[1] Large quantities of radioactivity began to leak from the reactor. [2] Most of the radioactivity was contained, and it is likely that no one received a harmful amount of radiation. [3] “Three Mile Island” became the reason that many Americans are afraid of nuclear power to this day. [4]
According to the passage, how was the chain reaction stopped at Three Mile Island?
A. By a built-in safety device
B. By the plant operators
C. By the loss of fuel
D. By water flooding the plant
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 questionsThree mile island nuclear power plantAmerica’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events th...
Đọc tiếp
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
Three mile island nuclear power plant
America’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events that would change the way America thought about nuclear power.
Within ten seconds after the flow of water was blocked, the reactor vessel became hotter and the pressure rose. Safety control rods were automatically thrust down into the reactor, causing the chain reaction to stop completely. Pressure, however, continued to build. A relief valve opened but failed to close. As a result, too much water escaped, and the reactor began to melt down.
[1] Large quantities of radioactivity began to leak from the reactor. [2] Most of the radioactivity was contained, and it is likely that no one received a harmful amount of radiation. [3] “Three Mile Island” became the reason that many Americans are afraid of nuclear power to this day. [4]
Where did the first problem occur at Three Mile Island?
A. In the control rods
B. In the reactor vessel
C. In the water circulation system
D. In the reactor’s core
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 questionsThree mile island nuclear power plantAmerica’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events th...
Đọc tiếp
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
Three mile island nuclear power plant
America’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events that would change the way America thought about nuclear power.
Within ten seconds after the flow of water was blocked, the reactor vessel became hotter and the pressure rose. Safety control rods were automatically thrust down into the reactor, causing the chain reaction to stop completely. Pressure, however, continued to build. A relief valve opened but failed to close. As a result, too much water escaped, and the reactor began to melt down.
[1] Large quantities of radioactivity began to leak from the reactor. [2] Most of the radioactivity was contained, and it is likely that no one received a harmful amount of radiation. [3] “Three Mile Island” became the reason that many Americans are afraid of nuclear power to this day. [4]
Which is the best place for the following sentence?
“ Even so, this disaster stayed in the minds of many Americans.”
A. [1]
B. [2]
C. [3]
D. [4]
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 questionsThree mile island nuclear power plantAmerica’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events th...
Đọc tiếp
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
Three mile island nuclear power plant
America’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events that would change the way America thought about nuclear power.
Within ten seconds after the flow of water was blocked, the reactor vessel became hotter and the pressure rose. Safety control rods were automatically thrust down into the reactor, causing the chain reaction to stop completely. Pressure, however, continued to build. A relief valve opened but failed to close. As a result, too much water escaped, and the reactor began to melt down.
[1] Large quantities of radioactivity began to leak from the reactor. [2] Most of the radioactivity was contained, and it is likely that no one received a harmful amount of radiation. [3] “Three Mile Island” became the reason that many Americans are afraid of nuclear power to this day. [4]
which word refers to the part of a nuclear reactor in which the nuclear reaction takes place?
A. Vessel
B. Core
C. Circulation system
D. Control rods
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 questionsThree mile island nuclear power plantAmerica’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events th...
Đọc tiếp
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
Three mile island nuclear power plant
America’s worst accident at a civilian nuclear power plant occurred on March 28, 1979, at Three Mile Island. Operators were trying to repair a problem with piping in the water circulation system, and they accidentally blocked the flow of water. This stopped the removal of heat from the reactor, and began a series of events that would change the way America thought about nuclear power.
Within ten seconds after the flow of water was blocked, the reactor vessel became hotter and the pressure rose. Safety control rods were automatically thrust down into the reactor, causing the chain reaction to stop completely. Pressure, however, continued to build. A relief valve opened but failed to close. As a result, too much water escaped, and the reactor began to melt down.
[1] Large quantities of radioactivity began to leak from the reactor. [2] Most of the radioactivity was contained, and it is likely that no one received a harmful amount of radiation. [3] “Three Mile Island” became the reason that many Americans are afraid of nuclear power to this day. [4]
It can be inferred that removing heat from a reactor is important because
A. It keeps pressure low enough to avoid accidents
B. It keeps the reactor producing energy
C. It stops a chain reaction
D. It stops radioactivity from leaking out of the reactor