题目内容
（请给出正确答案）
An individual nerve cell usually has a large cell body and a __________ nucleus.
A．cohesive
B．immature
C．conscientious
D．conspicuous
安装简答题APP，拍照搜题省时又省心！
更多“An individual nerve cell usual…”相关的问题
That is the purpose of Dr. Serre's computer. His project is nothing less than ad attempt to reverseengineer the relevant part of the brain. That part is the ventral visual pathway. Anatomy shows that it is organized into numerous areas. Experiments on monkeys, in which researchers have recorded what excites individual nerve cells in each of these areas, give strong hints about how it works.
The pathway is hierarchical. Signals from the retina flow to the most basic processing area first; the cells in that area fire up others in the next area, and so on. Those in the first area are fussy. They react to edges or bars in particular orientations. By combining their signals, however, cells in the second area can respond to comers or bars in any orientation. And so the system builds up. Cells in the final area can recognize general things, animals included.
Dr. Serre considered his computer's processing units analogous to nerve cells, and he organized them into areas, just as they are in real brains. Then he let the machine learn in much the same way that babies do. First he mimicked early development when nerve cells are plastic. At this stage babies' brains tune their nerve cells to visual features according to how common those features am in the world around them. That is why kittens raised so that they see only vertical lines have brains that look different from those raised in an environment with purely horizontal ones. Dr. Serre's processor developed sensitivities in a similar fashion when he showed it lots of photographs. That stage complete, he then told the computer when what it "saw" contained an animal, and when it did not.
The result was a model that closely imitates the ventral visual pathway. Processing units in each area are sensitive to the same set of features as nerve cells in the brain's analogous areas, and they are linked together as they are in the brain. This artificial recognition system correctly distinguishes photographs containing animals from those without creatures 82% of the time; Dr. Serre's students get it right 80% of the time. Moreover, his computer and his volunteers tend to slip up on the same images — and turning photographs on their sides makes poorer animal-recognizers out of both, by roughly the same amount.
The phrase "cognitive back-chatter" in paragraph 1 probably means ______.
A．communication with others
B．response to certain stimulation
C．instant processing of information
D．recognizing pictures or objects
The major debilitating symptoms of Alzheimer's disease include serious forgetfulness--particularly about recent events--and confusion, At first, the individual experiences only minor and almost imperceptible symptoms that are often attributed to emotional upsets or other physical illnesses. Gradually, however, the person becomes more forgetful, and this may be reported by anxious relatives. The person may neglect to turn off the oven, may misplace things, may recheck to see if a task was done, may take longer to complete a chore that was previously routine, or may repeat already-answered questions. As the disease progresses, memory loss and such changes in personality, mood, and behavior, such as confusion, irritability, restlessness and agitation, are likely to appear. Judgment, concentration, orientation, writing, reading, speech, motor behavior. and naming of objects may also be affected. Even when a loving and caring family is available to give support, the victim of Alzheimer's disease is more likely to spent his or her last days in a nursing home or long-term care institution. At this time, there is no cure.
According to the passage, which of the following is NOT true about Alzheimer's disease？
A．In the past, Alzheimer's disease has often been mistaken as normal human aging
B．Victims of Alzheimer's disease rarely need to be institutionalized.
C．There is currently no cure for Alzheimer's disease.
D．The primary symptoms are serious forgetfulness and confusion.
The person may neglect to turn off the oven, may misplace things, many recheck to see if a task was done,
It may take longer to complete a chore that was previously routine, or may repeat already-answered questions. As the disease progresses, memory loss and such changes in personality, mood, and behavior, such as confusion, irritability, restlessness and agitation, are likely to appear. Judgment, concentration, orientation, writing, reading, speech, motor behavior. and naming of objects may also be affected. Even when a loving and caring family is available to give support, the victim of Alzheimer' s disease is more likely to spend his or her last days in a nursing home or long-term care institution. At this time, there is no cure.
According to the passage, which of the following is NOT true about Alzheimer' s disease？
A．In the past, Alzheimer' s disease has often been mistaken as normal human aging.
B．Victims of Alzheimer' s disease rarely need to be institutionalized.
C．There is currently no cure for Alzheimer' s disease.
D．The primary symptoms are serious forgetfulness and confusion.
The major debilitating symptoms of Alzheimer's disease include serous forgetfulness -- particularly about recent events--and confusion. At first, the individual experiences only minor and almost imperceptible symptoms that are often attributed to emotional upsets or other physical illnesses. Gradually, however, the person becomes more forgetful, and this may be reported by anxious relatives. The person may neglect to turn off the oven, may misplace things, any recheck to see if a task was done, may take longer to complete a chore that was previously routine, or may repeat already-answered questions. As the disease progresses, memory loss and such changes in personality, mood, and behavior, such as confusion, irritability, restlessness and agitation, are likely to appear. Judgment, concentration, orientation, writing, reading, speech, motor behavior. and naming of objects may also be affected. Even when a loving and caring family is available to give support, the victim of Alzheimer's disease is more likely to spend his or her last days in a nursing home or long-term care institution. At this time, there is no cure.
According to the passage, which of the following is NOT true about Alzheimer's disease？
A．In the past, Alzheimer's disease has often been mistaken as normal human aging.
B．Victims of Alzheimer's disease rarely need to he institutionalized.
C．There is currently no cure for Alzheimer's disease.
D．The primary symptoms are serious forgetfulness and confusion.
The major debilitating symptoms of Alzheimer's disease include serous forgetfulness -- particularly about recent events--and confusion. At first, the individual experiences only minor and almost imperceptible symptoms that are often attributed to emotional upsets or other physical illnesses. Gradually, however, the person becomes more forgetful, and this may be reported by anxious relatives. The person may neglect to turn off the oven, may misplace things, any recheck to see if a task was done, may take longer to complete a chore that was previously routine, or may repeat already-answered questions. As the disease progresses, memory loss and such changes in personality, mood, and behavior, such as confusion, irritability, restlessness and agitation, are likely to appear. Judgment, concentration, orientation, writing, reading, speech, motor behavior. and naming of objects may also be affected. Even when a loving and caring family is available to give support, the victim of Alzheimer's disease is more likely to spend his or her last days in a nursing home or long-term care institution. At this time, there is no cure.
According to the passage, which of the following is NOT true about Alzheimer's disease？
A．In the past, Alzheimer' s disease has often been mistaken as normal human aging.
B．Victims of Alzheimer' s disease rarely need to be institutionalized.
C．There is currently no cure for Alzheimer's disease.
D．The primary symptoms are serious forgetfulness and confusion.
【B1】
A．although
B．rather
C．though
D．therefore
Even more interesting is the possibility that life on their planets may be in a more advanced stage of evolution. Present-day man is in a peculiar and probably temporary stage. His individual units retain a strong sense of personality. They are, in fact, still capable under favorable circumstances of leading individual lives. But man's societies are already sufficiently developed to have enormously more power and effectiveness
than the individuals have.
It is not likely that this transitional situation will continue very long on the evolutionary time scale. Fifty thousand year's from now man's societies may have become so close-knit that the individuals retain no sense of separate personality. Then little distinction will remain between the organic parts of the multiple organism and the inorganic parts (machines) that have been constructed by it. A million years further on man and his machines may have merged as closely as the muscles of the human body and nerve cells that set them in motion.
The explorers of space should be prepared for some' such situation. If they arrive on a foreign planet that has reached an advanced stage (and this is by no means impossible), they may find it being inhabited by a single large organism composed of many closely cooperating units.
The units may be "secondary"-machines created millions of years ago by a previous form. of life and given the will and ability to survive and reproduce. They may be built entirely of metals and other durable materials. If this is the case, they may be much more tolerant of their environment, multiplying under conditions that would destroy immediately any organism made of carbon compounds and dependent on the familiar car bon cycle.
Such creatures might be relics of a past age, many millions of years ago, when their planet was favorable to the origin of life, or they might be immigrants from a favored planet.
Humans on Earth today are characterized by______.
A．their existence as free and separate beings
B．their capability of living under favorable conditions
C．their great power and effectiveness
D．their strong desire for living in a close-knit society
A.musculocutaneous nerve
B.median nerve
C.ulnar nerve
D.axillary nerve
A、glossopharyngeal nerve and hypoglossal nerve
B、hypoglossal nerve and accessory nerve
C、vagus nerve, glossopharyngeal nerve and accessory nerve
D、facial nerve and vagus nerve
A.musculocutaneous nerve
B.median nerve
C.ulnar nerve
D.radial nerve
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
简答题
微信搜一搜
简答题
如搜索结果不匹配，请 
