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  3. You are going to read an article which is followed by a list of examples or headings. Choose the most suitable one from the list

You are going to read an article which is followed by a list of examples or headings. Choose the most suitable one from the list

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问题 You are going to read an article which is followed by a list of examples or headings. Choose the most suitable one from the list A-F for each numbered position(41-45). There may be certain extra which you do not need to use. (10 points)

A. Human behavior
B. Culture attributes
C. Physiology of Homo sapiens
D. Classification of Homo sapiens
E. Human society
F. Structure of Homo sapiens

    Human, common name given to any individual of the species Homo sapiens and, by extension, to the entire species. The term is also applied to certain species that were the evolutionary forerunners of Homo sapiens. Scientists consider all living people members of a single species.
    (41)______.
    Homo sapiens is identified, for purposes of classification, as an animal with a backbone and segmented spinal cord that suckles its young; that gestates its young with the aid of a placenta; that is equipped with five-digited extremities, a collarbone, and a single pair of mammary glands on the chest; and that has eyes at the front of the head, stereoscopic vision, and a proportionately large brain. The species belongs to the family Hominidae, the general characteristics of which are discussed below.
    (42)______.
    The details of skeletal structure distinguishing Homo sapiens from the nearest primate relatives-the gorilla, chimpanzee, and orangutan-stem largely from a very early adaptation to a completely erect posture and a two-footed striding walk. The uniquely S-shaped spinal column places the center of gravity of the human body directly over the area of support provided by the feet, thus giving stability and balance in the uptight position.
    Complete bipedalism in the human freed the hand to become a supremely sensitive instrument for precise manipulation and grasping. The most important structural detail in this refinement is the elongated human thumb, which can rotate freely and is fully opposable to the other fingers. The physiological requirements for speech were secondarily established by erect posture, which positions the vocal cords for controlled breathing, and by the skilled use of the hands. The latter development occurs in association with the enlargement and specialization of a brain area that is a prerequisite for refined control of the lips and tongue.
    (43)______.
    The large brain of Homo sapiens is approximately double that of early human toolmakers. This great increase in size in only 2 million years was achieved by a process called neoteny, which is the prolongation of retention of immature characteristics. The juvenile stage of brain and skull development is prolonged so that they grow for a longer period of time in relation to the time required to reach sexual maturity. Unlike the early human adult skull, with its sloping forehead and prominent jaw, the modem human skull-with biologically insignificant variations-retains into maturity a proportionately large size, in relation to the rest of the body, a high-rounded dome, straight-planed face, and reduced jaw size, all closely resembling the characteristics of the skull in the juvenile chimpanzee. Its enlarged dimensions required adaptations for passage through the birth canal; consequently, the human female pelvis widens at maturity, and the human infant is born prematurely.
    (44)______.
    The physiological adaptations that made humans more flexible than other primates allowed for the development of a wide range of abilities and an unparalleled versatility in behavior. The brain’s great size, complexity, and slow maturation, with neural connections being added though at least the first 12 years of life, meant that learned behavior could largely modify stereotyped, instinctive responses. New environmental demands could be met by rapid adjustments rather than by slow genetic selection; thus, survival in a wide range of habitats and under extreme conditions eventually became possible without further species differentiation. Each new infant, however, with relatively few innate traits yet with a vast number of potential behaviors, must be taught to achieve its biological potential as a human.
    (45)______.
    The human species has a unique capability for culture in the sense of conscious thinking and planning, transmission of skills and systems of social relationships, and creative modification of the environment. The integrated patterns of behavior required for planning and fashioning tools were accomplished at least 2.5 million years ago, and some form of advanced code for vocal communication may also have existed at this time. By 350,000 years ago planned hunting, fire making, and the wearing of clothing were well established, as was possibly ritualized disposal of the dead. Evidence of religion, recorded events, and art date from 30,000 to 40,000 years ago and imply advanced language and ethics for the complex ordering of social groups required for such activities. From about that time the genus Homo began to stabilize into the one generalized species of Homo sapiens.
选项
答案D
解析 根据主题句Homo sapiens is identified，for purposes of classification，as an animal with a backbone and segmented spinal cord that suckles its young可做出此判断。
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