3.(5%) Consider a signal x(t)=u(t+To)-u(t-T0), where u(t) is the unit step function. Performing the impulse-train sampling on x(t), we can have. What is the sampling period so that x(t) can be perfectly reconstructed by xp(t)?
25. 基態Cu原子之電子組態,下列何者正確? (A) [Ar]3d94s2 (B) (C) (D) [Ar]3d84s2