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The healing power of maggots is not new. Human beings have discovered it several times. The Maya are said to have used maggots for therapeutic purposes a thousand years ago. As early as the sixteenth century, European doctors noticed that soldiers with maggot-infested wounds healed well. More recently, doctors have realized that maggots can be cheaper and more effective than drugs in some respects, and these squirming larvae have, at times, enjoyed a quiet medical renaissance. The problem may have more to do with the weak stomachs of those using them than with good science. The modern heyday of maggot therapy began during World War I, when an American doctor named William Baer was shocked to notice that two soldiers who had lain on a battlefield for a week while their abdominal wounds became infested with thousands of maggots, had recovered better than wounded men treated in the military hospital. After the war, Baer proved to the medical establishment that maggots could cure some of the toughest infections.

(2) In the 1930s hundreds of hospitals used maggot therapy. Maggot therapy requires the right kind of larvae. Only the maggots of blowflies (a family that includes common bluebottles and greenbottles) will do the job; they devour dead tissue, whether in an open wound or in a corpse. Some other maggots, on the other hand, such as those of the screw-worm eat live tissue. They must be avoided. When blowfly eggs hatch in a patient’s wound, the maggots eat the dead flesh where gangrene-causing bacteria thrive. They also excrete compounds that are lethal to bacteria they don’t happen to swallow. Meanwhile, they ignore live flesh, and in fact, give it a gentle growth-stimulating massage simply by crawling over it. When they metamorphose into flies, they leave without a trace – although in the process, they might upset the hospital staff as they squirm around in a live patient. When sulfa drugs, the first antibiotics, emerged around the time of World War II, maggot therapy quickly faded into obscurity.

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Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical...
Đọc tiếp

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)

The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.

Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical demonstrations that can be verified by repetition. Science, at least in theory, is less concerned with the practicality of its results and more concerned with the development of general laws, but in practice science and technology are inextricably involved with each other. The varying interplay of the two can be observed in the historical development of such practitioners as chemists, engineers, physicists, astronomers, carpenters, potters, and many other specialists. Differing educational requirements, social status, vocabulary, methodology, and types of rewards, as well as institutional objectives and professional goals, contribute to such distinctions as can be made between the activities of scientists and technologists; but throughout history the practitioners of “pure” science have made many practical as well as theoretical contributions.

Question: Technology employs a more experimental methodology than that of science.

A. True

B. False

C. Not given

1
29 tháng 3 2019

Đáp án: C

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical...
Đọc tiếp

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)

The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.

Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical demonstrations that can be verified by repetition. Science, at least in theory, is less concerned with the practicality of its results and more concerned with the development of general laws, but in practice science and technology are inextricably involved with each other. The varying interplay of the two can be observed in the historical development of such practitioners as chemists, engineers, physicists, astronomers, carpenters, potters, and many other specialists. Differing educational requirements, social status, vocabulary, methodology, and types of rewards, as well as institutional objectives and professional goals, contribute to such distinctions as can be made between the activities of scientists and technologists; but throughout history the practitioners of “pure” science have made many practical as well as theoretical contributions.

Question: Throughout history the practitioners of “pure” science have made a lot of practical as well as theoretical contributions.

A. True

B. False

C. Not given

1
15 tháng 12 2018

Đáp án: A

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical...
Đọc tiếp

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)

The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.

Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical demonstrations that can be verified by repetition. Science, at least in theory, is less concerned with the practicality of its results and more concerned with the development of general laws, but in practice science and technology are inextricably involved with each other. The varying interplay of the two can be observed in the historical development of such practitioners as chemists, engineers, physicists, astronomers, carpenters, potters, and many other specialists. Differing educational requirements, social status, vocabulary, methodology, and types of rewards, as well as institutional objectives and professional goals, contribute to such distinctions as can be made between the activities of scientists and technologists; but throughout history the practitioners of “pure” science have made many practical as well as theoretical contributions.

Question: We can find more similarities than differences between the terms

A. True

B. False

C. Not given

1
20 tháng 10 2017

Đáp án: A

Giup e với . Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions. Cell phones are an integrated part of our society at this point, and their main use is communication. They keep students in touch with the rest of the world by giving them the power to interact with it . In my day, if you forgot your lunch you were at the mercy of the office calling home for you. Now, students have the ability to solve their own problems...
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Giup e với . Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions. Cell phones are an integrated part of our society at this point, and their main use is communication. They keep students in touch with the rest of the world by giving them the power to interact with it . In my day, if you forgot your lunch you were at the mercy of the office calling home for you. Now, students have the ability to solve their own problems and handle certain "emergencies" on their own. Cell phones also allow students the ability when the time is right, to keep in touch with students at other schools or friends that don't go to school. While not an educational benefit directly, better relationships can lead to higher self-esteem and reduce isolation, which is good for everybody. In the same way, camera phones allow students to capture the kinds of memories that help build a solid school culture, and, in some cases, can act as documentation of misbehavior in the same way that store cameras provide evidence and deter bad behavior. Academically, the cell phone can act as to record video of a procedure of explanation that may need to be reviewed later. It could be used to record audio of a lecture, as well, for later review. And just imagine if class could be easily " taped " for students who are absent? What if they could even be streamed and seen from home instantly? The iPod is a little trickier, because its function varies greatly by model. At its heart , it is a media player, and I know for a fact that many students work better while listening to music. For this reason, they can have a good effect by keeping students from getting too distracted while working ( ironic , because we mostly think of them AS distractions!). If it is a WIFI compatible model, and wireless internet is available, the iPod can be a great tool for looking up information or digging into things more deeply. Depending on the model, it may be able to act as a camera and video recorder as well (with the same benefits as the cell phone). Devices like the Kindle could, conceivably, make learning a lot easier. Imagine carrying all your textbooks in the palm of your hand, rather than strapped to your back! Though expensive, compared to buying new textbooks, the Kindle is a bargain. Many of the books used in high school English classes are actually FREE on the Kindle. 11. The passage mainly discusses ____. A. how some electronic devices are used in education B. how to use electronic devices in the classroom C. what is the best electronic device used in education D. which electronic device will be used as the textbooks 12. The word " it ' in the passage refers to ____. A. the power B. the world C. the rest of the world D. the main use 13. The phrase " at the mercy of " mostly means ____. A. completely dependent on B. at request of C. thankful to D. under orders 14. According to the passage, cell phones do NOT ____. A. help students keep in touch with their friends B. allow students to capture of memories C. help students record audio of a lecture D. enable students to write their assignment 15. The word " which " in the passage refers to ____. A. building better relationships B. achieving higher self-esteem C. that relationships lead to higher self-esteem D. having higher-esteem and lower isolation 16. Which of the following is closest in meaning to the word " taped "? A. recorded B. reviewed C. streamed D. seen 17. The phrase " At its heart " mostly refers to ____. A. the main function B. the core part C. the central unit D. the best usage 18. The word " ironic " is closest in meaning to ____. A. lucky B. special C. funny D. particular 19. Which of the following is NOT true about the iPod according to the passage? A. The iPod can be used to make phone calls. B. The iPod can be connected to the Internet. C. The iPod can be used to record videos D. The iPod comes in different models. 20. Which of the following is true about the kindle according to the passage? A. The Kindle is more economical than new textbooks. B. Everything read on the Kindle is free of charge. C. The Kindle comes in different models as the iPod does. D. You cannot listen to music with a Kindle
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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   The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially...
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  

The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. People of different cultures are more prone to contact certain illnesses because of the characteristic foods they consume.

That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates nitrites (commonly used to preserve color in meat) as well as other food additives caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which ingredients on the packaging label of processed food are helpful or harmful.

The additives that we eat are not all so direct. Farmers often give penicillin to cattle and poultry, and because of this, penicillin has been found in the milk of treated cows.

Sometimes similar drugs are administered to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.

A healthy diet is directly related to good health. Often we are unaware of detrimental substances we ingest. Sometimes well-meaning farmers or others who do not realize the consequences add these substances to food without our knowledge.

Question: What are nitrates used for?

A. They preserve the color of meat

B. They preserve flavor in package 

CThe are objects of research

D. They cause the animals become fatter

1
12 tháng 3 2017

Đáp án: A

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  The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially...
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  

The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. People of different cultures are more prone to contact certain illnesses because of the characteristic foods they consume.

That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates nitrites (commonly used to preserve color in meat) as well as other food additives caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which ingredients on the packaging label of processed food are helpful or harmful.

The additives that we eat are not all so direct. Farmers often give penicillin to cattle and poultry, and because of this, penicillin has been found in the milk of treated cows.

Sometimes similar drugs are administered to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.

A healthy diet is directly related to good health. Often we are unaware of detrimental substances we ingest. Sometimes well-meaning farmers or others who do not realize the consequences add these substances to food without our knowledge.

Questio: What is best title for this passage?

A. The food you eat can affect your health

B. Harmful and Harmless substances in food

C. Avoiding injurious substances in food

D. Improving health through a Natural Diet

1
2 tháng 1 2018

Đáp án: A

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical...
Đọc tiếp

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)

The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.

Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical demonstrations that can be verified by repetition. Science, at least in theory, is less concerned with the practicality of its results and more concerned with the development of general laws, but in practice science and technology are inextricably involved with each other. The varying interplay of the two can be observed in the historical development of such practitioners as chemists, engineers, physicists, astronomers, carpenters, potters, and many other specialists. Differing educational requirements, social status, vocabulary, methodology, and types of rewards, as well as institutional objectives and professional goals, contribute to such distinctions as can be made between the activities of scientists and technologists; but throughout history the practitioners of “pure” science have made many practical as well as theoretical contributions.

Question: The meanings of the terms science and technology have stayed the same.

A. True

B. False

C. Not given

1
23 tháng 5 2019

Đáp án: B

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical...
Đọc tiếp

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)

The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.

Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical demonstrations that can be verified by repetition. Science, at least in theory, is less concerned with the practicality of its results and more concerned with the development of general laws, but in practice science and technology are inextricably involved with each other. The varying interplay of the two can be observed in the historical development of such practitioners as chemists, engineers, physicists, astronomers, carpenters, potters, and many other specialists. Differing educational requirements, social status, vocabulary, methodology, and types of rewards, as well as institutional objectives and professional goals, contribute to such distinctions as can be made between the activities of scientists and technologists; but throughout history the practitioners of “pure” science have made many practical as well as theoretical contributions.

Question: Science, at least in theory, is more concerned with the development of general laws and less concerned with the practicality of its results.

A. True

B. False

C. Not given

1
19 tháng 6 2017

Đáp án: A

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  The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially...
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  

The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. People of different cultures are more prone to contact certain illnesses because of the characteristic foods they consume.

That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates nitrites (commonly used to preserve color in meat) as well as other food additives caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which ingredients on the packaging label of processed food are helpful or harmful.

The additives that we eat are not all so direct. Farmers often give penicillin to cattle and poultry, and because of this, penicillin has been found in the milk of treated cows.

Sometimes similar drugs are administered to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.

A healthy diet is directly related to good health. Often we are unaware of detrimental substances we ingest. Sometimes well-meaning farmers or others who do not realize the consequences add these substances to food without our knowledge.

Question: All of the following statements are TRUE except ______________

A. Drug are always given to animals for medical reasons

B. Food may cause forty percent of the cancer in the world

C. Researchers have known about the potential hazard of food additives for more than 45 years

D. Some of the additives in our food are added to the food itself and some are given to the living animals

1
5 tháng 3 2017

Đáp án: A