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【简答题】
主动脉全长分为三段,依次为____、____和____。
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反馈参考答案：
举一反三
【单选题】The effect of presynaptic receptor is
A.
promote the trafficing of vesicle.
B.
induce Ca2+ influx.
C.
promote the store of neurotranstters.
D.
promote the reuptake of neurotransmitters.
E.
regulate the release of neurotransmitters.
【单选题】presynaptic inhibition的发生是由于
A.
突触前膜兴奋性递质释放量减少
B.
突触前膜释放抑制性递质
C.
突触后膜超级化
D.
collateral inhibition
E.
中间抑制性神经元兴奋结果
【简答题】使内环境理化性质保持相对恒定的调节，属于
【单选题】It can be inferred that researchers abandoned the presynaptic hypothesis because______ .
A.
a new and more attractive hypothesis was suggested
B.
no research was reported that supported the hypothesis
C.
research results provided evidence to counter the hypothesis
D.
the hypothesis was supported only by studies of animals and not by studies of human beings
【单选题】The structural basis of presynaptic inhibition is
A.
Axon-axon synapse and axon-dendritic synapse
B.
Axon-cell body synapse and axon-cell body synapse
C.
Axon-axon synapse and axon-cell synapse
D.
Axon-dendritic synapse and axon-dendritic synapse
E.
Axon-axon synapse and axon-axon synapse
【简答题】图示机构在水平面内绕铅垂轴O转动，各齿轮半径为r 1 ＝r 3 ＝3r 2 ＝0.3m,轮质量为m 1 ＝m 3 ＝9m 2 ＝90kg，皆可视为均质圆盘。系杆OA上的驱动力偶矩M 0 ＝180N·m，轮1上的驱动力偶矩为M 1 ＝150N·m，轮3上的阻力偶矩M 3 ＝120N·m。不计系杆的质量和各处摩擦，求轮Ⅰ和系杆的角加速度。
【单选题】The effect of presynaptic receptor is
A.
regulate the release of neurotransmitters.
B.
promote the trafficing of vesicle.
C.
induce Ca2+ influx.
D.
promote the store of neurotranstters.
E.
promote the reuptake of neurotransmitters.
【单选题】Structural Basis of presynaptic inhibition is :
A.
Axo-axonic synapse
B.
Axo-dendritic synapse
C.
Axo-somatic synapse
D.
dendritic-somatic synapse
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