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【名词解释】“契瓦拉”羚羊面具顶饰
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【单选题】Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat. (31) adaptation is to be light in color, and to (32) rather than absorb the sun...
A.
from
B.
by
C.
to
D.
of
【单选题】某猪场7日龄哺乳仔猪发病，病初呕吐，继而水样腹泻，粪便内含有未消化的凝乳块，病死率达90%；取病猪粪便经处理后电镜观察，可见表面具有放射状纤突的病毒。该猪群感染的病原可能是______
A.
猪瘟病毒
B.
猪细小病毒
C.
猪圆环病毒
D.
猪水疱病病毒
E.
猪传染性胃肠炎病毒
【单选题】Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat. (31) adaptation is to be light in color, and to (32) rather than absorb the sun...
A.
Another strategy (37) large desert animals is to tolerate the loss of body water to a point (38) would be fatal for non-adapted animals. The camel can lose up to 30 percent of its body weight (39) water without harm to itself, (40) human beings die after losing only 12 to 13 percent of their body weight. An equally important adaptation is the ability to (41) this water loss (42) one drink. Desert animals can drink prodigious’ volumes in a short time, and camels have been known to (43) over 100 liters in a few minutes. A very dehydrated person, (44) , cannot drink enough water to rehydrate at one (45) , because the human stomach is not sufficiently big and because a too rapid (46) of the body fluids causes death from water intoxication. The (47) of water loss is of obvious advantage in the desert, as animals do not have to remain (48) a water hole but can obtain food from grazing sparse and far-flung pastures. Desert-adapted mammals have the (49) ability to feed normally when extremely dehydrated; it is a common experience in people that appetite is lost even (50) conditions of moderate thirst.
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【单选题】Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat. (31) adaptation is to be light in color, and to (32) rather than absorb the sun...
A.
from
B.
by
C.
to
D.
of
【单选题】某猪场7日龄哺乳仔猪发病，病初呕吐，继而水样腹泻，粪便内含有未消化的凝乳块，病死率达90%；取病猪粪便经处理后电镜观察，可见表面具有放射状纤突的病毒。该猪群感染的病原可能是______
A.
猪瘟病毒
B.
猪细小病毒
C.
猪圆环病毒
D.
猪水疱病病毒
E.
猪传染性胃肠炎病毒
【单选题】Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat. (31) adaptation is to be light in color, and to (32) rather than absorb the sun...
A.
Another strategy (37) large desert animals is to tolerate the loss of body water to a point (38) would be fatal for non-adapted animals. The camel can lose up to 30 percent of its body weight (39) water without harm to itself, (40) human beings die after losing only 12 to 13 percent of their body weight. An equally important adaptation is the ability to (41) this water loss (42) one drink. Desert animals can drink prodigious’ volumes in a short time, and camels have been known to (43) over 100 liters in a few minutes. A very dehydrated person, (44) , cannot drink enough water to rehydrate at one (45) , because the human stomach is not sufficiently big and because a too rapid (46) of the body fluids causes death from water intoxication. The (47) of water loss is of obvious advantage in the desert, as animals do not have to remain (48) a water hole but can obtain food from grazing sparse and far-flung pastures. Desert-adapted mammals have the (49) ability to feed normally when extremely dehydrated; it is a common experience in people that appetite is lost even (50) conditions of moderate thirst.
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