The linear system transfer function is G(s)=1/(s+2). When input signal is r(t)= sin2t，the phase shift of the steady-state output compared to the input is .
A、lag45°;
B、thesame;
C、ead45°;
D、lead90°
发布时间：2025-11-15 21:00:21
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答案：lag 45°
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