Without regular supplies of some
hormones our capacity to behave would be seriously impaired; without others we
would soon die. Tiny amounts of some hormones can modify our moods and our
action, our inclination to eat or drink, our aggressiveness or submissiveness,
and our reproductive and parental behavior. And hormones do more than influence
adult behavior; early in life they help to determine the development of bodily
form and may even determine an individual’s behavioral capacities. Later in life
the changing outputs of some endocrine glands and the body’s changing
sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent
integration of behavior were considered the exclusive province of the nervous
system up to the beginning of the present century. The A. To explain the specific functions of various hormones. B. To provide general information about hormones. C. To explain how the term "hormone" evolved. D. To report on experiments in endocrinology.
更多"{{B}}第三篇{{/B}}
Withou"的相关试题:
[单项选择]{{B}}第三篇{{/B}}
Without regular supplies of some
hormones our capacity to behave would be seriously impaired; without others we
would soon die. Tiny amounts of some hormones can modify our moods and our
action, our inclination to eat or drink, our aggressiveness or submissiveness,
and our reproductive and parental behavior. And hormones do more than influence
adult behavior; early in life they help to determine the development of bodily
form and may even determine an individual’s behavioral capacities. Later in life
the changing outputs of some endocrine glands and the body’s changing
sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent
integration of behavior were considered the exclusive province of the nervous
system up to the beginning of the present century. The A. offensive B. invasion C. assault D. initiative
[单项选择]第三篇
Water
The second most important constituent (构成成份) of the biosphere (生物圈) is liquid water. This can only exist in a very narrow range of temperatures, since water freezes at 0℃ and boils at 100℃. Life as we know it would only be possible on the surface of a planet which had temperatures somewhere within this narrow range.
The earth’s supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately, but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers. Most of it is in the form of the salt water of the oceans about 97 percent. The rest is fresh, but three quarters of this is in the form of ice at the Poles and on mountains, and cannot be used by living systems until melted. Of the remaining fractional which is somewhat less than one per cent of the whole, there is 10—20 times as much stored underground water as t A. in the center of the earth. B. on the surface of our planet. C. in a very narrow range of temperatures. D. in the coastal areas of the earth.
[单项选择]{{B}}第三篇{{/B}}
{{B}}Snow Ranger{{/B}} The two things — snow and mountains — which
are’ needed for a ski area are the two things that cause avalanches, large mass
of snow and ice crashing’ down the side of a mountain — often called "White
Death." It was file threat of the avalanche and its record as a
killer of man in the western mountains that created the snow ranger. He first
started on avalanche control work in the winter of 1937 — 1938 at Alta, Utah, in
Wasatch National Forest. This mountain valley was becoming well
known to skiers. It was dangerous. In fact, more than 120 persons had lost their
lives in 1936 and another 200 died in 1937 as a result of avalanches before it
became a major ski area. Thus, development of Alta and other
major ski resorts in the west was dependent upon cont A. a college graduate B. a physicist C. a geologist D. a mountaineer
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