A、不稳定 B、只有当幅值裕度时k<sub>gsub>>1才稳定 C、稳定 D、不能判用相角裕度判断系统的稳定性
A、K<sub>1sub>+K<sub>2sub> B、K<sub>1sub>-K<sub>2sub> C、K<sub>1sub>·K<sub>2sub> D、K<sub>1sub>/K<sub>2sub>
A、K<sub>1sub>+K<sub>2sub> B、K<sub>1sub>-K<sub>2sub> C、K<sub>1sub>·K<sub>2sub> D、K<sub>1sub>/K<sub>2sub>
A、K>K<sub>lsub>>K<sub>gsub> B、K<sub>lsub>>K<sub>gsub>>K C、K<sub>gsub>>K>K<sub>lsub> D、K>K<sub>gsub>>K<sub>lsub>
A、Kθ<sub>1sub>+ 3Kθ<sub>2sub>-Kθ<sub>3sub> B、Kθ<sub>1sub>Kθ<sub>2sub>Kθ<sub>3sub> C、Kθ<sub>1sub>Kθ<sub>2sub>/Kθ<sub>3sub> D、Kθ<sub>1sub>Kθ3<sub>2sub>/Kθ<sub>3sub>
A、E<sub>1sub>=E<sub>2sub>;K<sub>1sub>=K<sub>2sub> B、E<sub>1sub>≠E<sub>2sub>;K<sub>1sub>=K<sub>2sub> C、E<sub>1sub>=E<sub>2sub>;K<sub>1sub>≠K<sub>2sub> D、E<sub>1sub>≠E<sub>2sub>;K<sub>1sub>≠K<sub>2sub>
A、KØ<sub>1sub>/ KØ<sub>2sub> B、KØ<sub>2sub>/KØ<sub>1sub> C、KØ<sub>1sub>· KØ<sub>2sub> D、KØ<sub>1sub>- KØ<sub>2sub>
A、Δ<sub>rsub>G<sub>msub>(1)0=2Δ<sub>rsub>G<sub>msub>(2)0,K<sub>1sub>0=K<sub>2sub>0 B、Δ<sub>rsub>G<sub>msub>(1)0=2Δ<sub>rsub>G<sub>msub>(2)0,K<sub>1sub>0=(K<sub>2sub>0)2 C、Δ<sub>rsub>G<sub>msub>(1)0=Δ<sub>rsub>G<sub>msub>(2)0,K<sub>1sub>0=(K<sub>2sub>0)2 D、Δ<sub>rsub>G<sub>msub>(1)0=Δ<sub>rsub>G<sub>msub>(2)0,K<sub>1sub>0=K<sub>2sub>0