【单选题】常见能发生“光电导现象”的半导体材料有:( )
【单选题】The effect of presynaptic receptor is
A.
promote the trafficing of vesicle.
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
【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】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.
D.
promote the store of neurotranstters.
E.
promote the reuptake of neurotransmitters.
【单选题】Structural Basis of presynaptic inhibition is :
D.
dendritic-somatic synapse