带电阻性负载的单相半波可控整流电路中,α的移向范围是()而对应的θ的变化范围为()
A.0-π,0-π
B.0-π/3,0-π
C.0-π,π-0
D.π/3-0,0-π
参考答案:C
__________ into consideration, they believed themselves more and returned to their positions.
A.Nothing to take
B.Everything taking
C.Nobody to be taken
D.Everything taken
“人天生是政治的动物”这句话是谁首先提出的?()
A、苏格拉底
B、柏拉图
C、亚里士多德
D、孟德斯鸠