乃颜叛乱发生的时间是:()
A、1270.0
B、1287.0
C、1288.0
D、1289.0
参考答案:B
--- Why does Thomas speak through every discussion but never listen to the others?
--- That’s what he________do. We used to hate that, but are used to it now.
A.ought to
B.can
C.will
D.might
什么是三极管的电流放大系数?