单选题Which of the following statements is NOT true?AThe increase in blood masked some of the subtle changes.BIt took three seconds after an event for the flow of blood to increase to an area of the brain.CThe body’s reaction was like watering the entire garden for the sake of one thirsty flower.DResearchers will use new methods to study human brains because of the limit of conventional imaging techniques.
单选题
Which of the following statements is NOT true?
A
The increase in blood masked some of the subtle changes.
B
It took three seconds after an event for the flow of blood to increase to an area of the brain.
C
The body’s reaction was like watering the entire garden for the sake of one thirsty flower.
D
Researchers will use new methods to study human brains because of the limit of conventional imaging techniques.
参考解析
解析：
是非题，可采用排除法。选项A在第十段最后一句提到“But the increase in blood was so abundant that it covered… masking some of the subtle changes”，对应选项A的内容。第九段第一句提到“it took three seconds or more after an event for the flow of blood to increase to an area of the brain dealing with a stimulus”，和选项B表达内容相符。选项C在第十一段提到。只有选项D的内容在文中没有体现。因此答案为D。
是非题，可采用排除法。选项A在第十段最后一句提到“But the increase in blood was so abundant that it covered… masking some of the subtle changes”，对应选项A的内容。第九段第一句提到“it took three seconds or more after an event for the flow of blood to increase to an area of the brain dealing with a stimulus”，和选项B表达内容相符。选项C在第十一段提到。只有选项D的内容在文中没有体现。因此答案为D。
相关考题：
Which of the following a true statements regarding the use of VLANs to segment a network? (Select three)A. They increase the size of collision domainsB. They allow logical grouping of users by function.C. They can enhance network security.D. They increase the size of the broadcast domain while decreasing the number of collision domains.E. They increase the number of broadcast domains while decreasing the size of the broadcast domains.F. They simplify switch administration.
After an accident the victim may go into shock and die. What should be done to help prevent shock?A.Slightly elevate the head and feetB.Keep the person awakeC.Keep the person lying down and at a comfortable temperatureD.Give the person a stimulant to increase blood flow
共用题干第一篇Sprained（扭伤）AnkleOne of the most common injuries teenagers and adults experience is a sprained ankle.A sprain occurs when the ligaments（韧带）of a joint are twisted（扭伤）and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position.A sprain can occur from a sudden twisting at the joint,or a stretching or tearing of the fibers of the ligaments. The injured area usually swells（肿胀）and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an ankle on fire!If you cannot walk without experiencing intense pain,you must seek medical help.If the pain is manageable,and you can walk,here are three words to help you remember how to treat yourself:●Elevate（抬高）●Cool●Bandage（打绷带）As soon as there is injury to that ligament,there will be a certain amount of bleeding under the skin. Once the blood pools around the damaged blood vessels,swelling occurs.The pressure from the swelling results in additional stress and tenderness to the region.In order to reduce the degree of swelling,lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart.Next,to reduce blood distribution and keep bleeding（流血）to a minimum, apply a cold pack. After 20 minutes, take the pack off,wait half an hour and then reapply.This can be done several times a day for a total of three days.Never leave a cold pack on for more than 20 minutes at a time.Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature!Therefore, one accidentally triggers（引起）more blood distribution to the affected area by leaving a cold pack on for too long!Finally,bandage the ankle.Be careful not to wind it too tightly;doing so can restrict blood flow and cause harm to the entire foot.The main idea of the passage is to explain__________.A:how a sprain occursB:how to treat a sprained ankleC:how to bandage an injured footD:how to reduce the temperature of a wounded area
Which of the following is not mentioned in this article?__________A.The number of the Chinese students studying in the USB.The Chinese government's reaction to this affairC.The time when the US delegation will leave BeijingD.The increase of the US students that study in China
共用题干第二篇Bone Marrow TransplantationBone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.Healthy stem cells may come from the following sources EXCEPT__________.A:peripheral blood stem cellsB:baby bloodC:bone marrowD:cord blood
共用题干第三篇Sprained（扭伤）AnkleOne of the most common injuries teenagers and adults experience is a sprained ankle.A sprain occurs when the ligaments（韧带）of a joint are twisted（扭伤）and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position.A sprain can occur from a sudden twisting at the joint,or a stretching or tearing of the fibers of the ligaments. The injured area usually swells（肿胀）and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an ankle on fire!If you cannot walk without experiencing intense pain,you must seek medical help.If the pain is manageable,and you can walk,here are three words to help you remember how to treat yourself:● Elevate（抬高）●Cool● Bandage（打绷带）As soon as there is injury to that ligament,there will be a certain amount of bleeding under the skin. Once the blood poois around the damaged blood vessels,swelling occurs.The pressure from the swelling results in additional stress and tenderness to the region.In order to reduce the degree of swelling,lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart. Next,to reduce blood distribution and keep bleeding（流血）to a minimum , apply a cold pack. After 20 minutes , take thepack off,wait half an hour,and then reapply.This can be done several times a day for a total of three days.Never leave a cold pack on for more than 20 minutes at a time.Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature!Therefore, one accidentally triggers（引起）more blood distribution to the affected area by leaving a cold pack on for too long!Finally,bandage the ankle.Be careful not to wind it too tightly;doing so can restrict blood flow and cause harm to the entire foot.The word "it" in Paragraph 2(Line 5)refers to__________.A:injuryB:pressureC:ankleD:swelling
共用题干第三篇Sprained（扭伤）AnkleOne of the most common injuries teenagers and adults experience is a sprained ankle.A sprain occurs when the ligaments（韧带）of a joint are twisted（扭伤）and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position.A sprain can occur from a sudden twisting at the joint,or a stretching or tearing of the fibers of the ligaments. The injured area usually swells（肿胀）and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an ankle on fire!If you cannot walk without experiencing intense pain,you must seek medical help.If the pain is manageable,and you can walk,here are three words to help you remember how to treat yourself:● Elevate（抬高）●Cool● Bandage（打绷带）As soon as there is injury to that ligament,there will be a certain amount of bleeding under the skin. Once the blood poois around the damaged blood vessels,swelling occurs.The pressure from the swelling results in additional stress and tenderness to the region.In order to reduce the degree of swelling,lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart. Next,to reduce blood distribution and keep bleeding（流血）to a minimum , apply a cold pack. After 20 minutes , take thepack off,wait half an hour,and then reapply.This can be done several times a day for a total of three days.Never leave a cold pack on for more than 20 minutes at a time.Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature!Therefore, one accidentally triggers（引起）more blood distribution to the affected area by leaving a cold pack on for too long!Finally,bandage the ankle.Be careful not to wind it too tightly;doing so can restrict blood flow and cause harm to the entire foot.The main idea of the passage is to explain__________.A:how a sprain occursB:how to treat a sprained ankleC:how to reduce the temperature of a wounded areaD:how to bandage an injured foot
共用题干第三篇Sprained（扭伤）AnkleOne of the most common injuries teenagers and adults experience is a sprained ankle.A sprain occurs when the ligaments（韧带）of a joint are twisted（扭伤）and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position.A sprain can occur from a sudden twisting at the joint,or a stretching or tearing of the fibers of the ligaments. The injured area usually swells（肿胀）and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an ankle on fire!If you cannot walk without experiencing intense pain,you must seek medical help.If the pain is manageable,and you can walk,here are three words to help you remember how to treat yourself:● Elevate（抬高）●Cool● Bandage（打绷带）As soon as there is injury to that ligament,there will be a certain amount of bleeding under the skin. Once the blood poois around the damaged blood vessels,swelling occurs.The pressure from the swelling results in additional stress and tenderness to the region.In order to reduce the degree of swelling,lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart. Next,to reduce blood distribution and keep bleeding（流血）to a minimum , apply a cold pack. After 20 minutes , take thepack off,wait half an hour,and then reapply.This can be done several times a day for a total of three days.Never leave a cold pack on for more than 20 minutes at a time.Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature!Therefore, one accidentally triggers（引起）more blood distribution to the affected area by leaving a cold pack on for too long!Finally,bandage the ankle.Be careful not to wind it too tightly;doing so can restrict blood flow and cause harm to the entire foot.Once the initial cold pack is removed,what is to be done?A:Begin bandaging the ankle.B:Wait 30 minutes and then reapply the ice pack for 20 minutes.C:Keep the ankle in a position lower than your heart.D:Wait 20 minutes and then reapply the ice pack for 30 minutes.
共用题干第三篇Sprained（扭伤）AnkleOne of the most common injuries teenagers and adults experience is a sprained ankle.A sprain occurs when the ligaments（韧带）of a joint are twisted（扭伤）and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position.A sprain can occur from a sudden twisting at the joint,or a stretching or tearing of the fibers of the ligaments. The injured area usually swells（肿胀）and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an ankle on fire!If you cannot walk without experiencing intense pain,you must seek medical help.If the pain is manageable,and you can walk,here are three words to help you remember how to treat yourself:● Elevate（抬高）●Cool● Bandage（打绷带）As soon as there is injury to that ligament,there will be a certain amount of bleeding under the skin. Once the blood poois around the damaged blood vessels,swelling occurs.The pressure from the swelling results in additional stress and tenderness to the region.In order to reduce the degree of swelling,lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart. Next,to reduce blood distribution and keep bleeding（流血）to a minimum , apply a cold pack. After 20 minutes , take thepack off,wait half an hour,and then reapply.This can be done several times a day for a total of three days.Never leave a cold pack on for more than 20 minutes at a time.Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature!Therefore, one accidentally triggers（引起）more blood distribution to the affected area by leaving a cold pack on for too long!Finally,bandage the ankle.Be careful not to wind it too tightly;doing so can restrict blood flow and cause harm to the entire foot.A sprain is caused by_________.A:ligament fibers of a joint being twistedB:constantly changing body temperatureC:blood vessels being hurt in the footD:elevating one's ankle
共用题干第三篇Sprained（扭伤）AnkleOne of the most common injuries teenagers and adults experience is a sprained ankle.A sprain occurs when the ligaments（韧带）of a joint are twisted（扭伤）and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position.A sprain can occur from a sudden twisting at the joint,or a stretching or tearing of the fibers of the ligaments. The injured area usually swells（肿胀）and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an ankle on fire!If you cannot walk without experiencing intense pain,you must seek medical help.If the pain is manageable,and you can walk,here are three words to help you remember how to treat yourself:● Elevate（抬高）●Cool● Bandage（打绷带）As soon as there is injury to that ligament,there will be a certain amount of bleeding under the skin. Once the blood poois around the damaged blood vessels,swelling occurs.The pressure from the swelling results in additional stress and tenderness to the region.In order to reduce the degree of swelling,lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart. Next,to reduce blood distribution and keep bleeding（流血）to a minimum , apply a cold pack. After 20 minutes , take thepack off,wait half an hour,and then reapply.This can be done several times a day for a total of three days.Never leave a cold pack on for more than 20 minutes at a time.Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature!Therefore, one accidentally triggers（引起）more blood distribution to the affected area by leaving a cold pack on for too long!Finally,bandage the ankle.Be careful not to wind it too tightly;doing so can restrict blood flow and cause harm to the entire foot. The black-and-blue symptom of a sprain is due to_________.A:bleeding under the skinB:a tight bandageC:applying a cold packD:pressing one's ankle
Which of the following a true statements regarding the use of VLANs to segment anetwork? （）A、They increase the size of collision domainsB、They allow logical grouping of users by function.C、They can enhance network security.D、They increase the size of the broadcast domain while decreasing the number of collision domains.E、They increase the number of broadcast domains while decreasing the size of the broadcast domains.F、They simplify switch administration.
单选题According to the passage, scientists can’t observe some of the earliest steps in brain activity becausee.Athose changes are subtle and masked by some reactionsBsubtle changes in blood flow began earlierCthe imaging techniques are out of placeDthe flow of blood to increase to an area of the brain is slow
多选题Which of the following a true statements regarding the use of VLANs to segment anetwork? （）AThey increase the size of collision domainsBThey allow logical grouping of users by function.CThey can enhance network security.DThey increase the size of the broadcast domain while decreasing the number of collision domains.EThey increase the number of broadcast domains while decreasing the size of the broadcast domains.FThey simplify switch administration.
单选题According to the passage, why couldn’t PET and functional M. R. I. scans detect subtle changes in blood flow earlier?ABecause there is early oxygen transfer.BBecause they do not form their images quickly enough to follow such rapid changes.CBecause researchers control the changes in blood flow.DBecause early oxygen transfer gives the flow blood energy.
单选题Passage2 Questions 6 to 10 are based on the following passage. Salt is as necessary to life as water. In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in. urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys（肾） and sweat glands(腺). It then tries to adjust to this loss by speeding up its secretion(分泌) of water. (78) In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing.Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of. salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.6 Some African people once drank animal urine______.Awhen they were going to dieBbecause they were thirstyCbecause there was little saltDbecause they were short of water
单选题Passage2 Questions 6 to 10 are based on the following passage. Salt is as necessary to life as water. In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in. urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys（肾） and sweat glands(腺). It then tries to adjust to this loss by speeding up its secretion(分泌) of water. (78) In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing.Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of. salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.7 In order to adjust to the loss of salt, the body______.Aloses some bloodBspeeds up its secretion of waterCspeeds up its secretion of saltDis drying up slowly
单选题Passage2 Questions 6 to 10 are based on the following passage. Salt is as necessary to life as water. In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in. urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys（肾） and sweat glands(腺). It then tries to adjust to this loss by speeding up its secretion(分泌) of water. (78) In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing.Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of. salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.10 What is the main idea of the passage?ASalt is very important.BIf their blood salt level is not constant, human beings may die.CThe amount of salt in the body is secreted.DPeople can die of thirst.
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单选题Passage2 Questions 6 to 10 are based on the following passage. Salt is as necessary to life as water. In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in. urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys（肾） and sweat glands(腺). It then tries to adjust to this loss by speeding up its secretion(分泌) of water. (78) In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing.Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of. salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.8 Which of the following statements is NOT the result of a lack of salt in the body?AThe body secretes more water.BThe body dries up.CThe person dies of thirst.DThe person gets fatter.
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