A、u<sub>01sub>=u<sub>02sub> B、u<sub>01sub>=-u<sub>02sub> C、u<sub>01sub>>u<sub>02sub> D、u<sub>01sub><u<sub>02sub>
A、u<sub>01sub>=u<sub>02sub> B、u<sub>01sub>=-u<sub>02sub> C、u<sub>01sub>>u<sub>02sub> D、u<sub>01sub><u<sub>02sub>
A、n=2,L=2,m<sub>1sub>=0,m<sub>2sub>=1/2 B、n=3,L=1,m<sub>1sub>=-1,m<sub>2sub>=-1/2 C、n=1,L=2,m<sub>1sub>=1,m<sub>2sub>=1/2 D、n=1,L=0,m<sub>1sub>=1,m<sub>2sub>=-1/2
A、在下图所示的电路中,L=0.8uH,C<sub>1sub>=C<sub>2sub>=20pF,R<sub>ssub>=10kΩ,R<sub>Lsub>=5kΩ,Q<sub>0sub>=100。试求回路在有载情况下的谐振频率f<sub>0sub>,谐振电阻R<sub>Σsub>,回路有载Q值和通频带BW<sub>0.7sub>。
A、H<sub>1sub>>H<sub>2sub>;P<sub>1sub>=P<sub>2sub> B、H<sub>1sub>=H<sub>2sub>;P<sub>1sub>>P<sub>2sub> C、H<sub>1sub>>H<sub>2sub>;P<sub>1sub>>P<sub>2sub> D、H<sub>1sub>=H<sub>2sub>;P<sub>1sub>=P<sub>2sub>
A、只有M<sub>1sub>启动后,M<sub>2sub>才能启动 B、M<sub>1sub>、M<sub>2sub>都运行时,接下SB<sub>12sub>时,M<sub>1sub>、M<sub>2sub>均会停止 C、M<sub>1sub>、M<sub>2sub>都运行时,只有M<sub>2sub>停止以后,才能停止M<sub>1sub> D、M<sub>1sub>可以单独启动、停止操作
A、U<sub>bsub>+U<sub>1sub>-U<sub>2sub>=0 B、U<sub>bsub>-U<sub>2sub>+U<sub>1sub>=0 C、U<sub>bsub>+U<sub>1sub>+U<sub>2sub>=0 D、U<sub>bsub>-U<sub>1sub>-U<sub>2sub>=0
A、如果a<sub>1sub>b<sub>1sub>=a<sub>2sub>b<sub>2sub>,则混合溶液的pH>7 B、如果混合液的pH=7,则混合溶液中c(CH<sub>3sub>COO-)=c(Na+) C、如果a<sub>1sub>=a<sub>2sub>,b<sub>1sub>=b<sub>2sub>,则混合液液中c(CH<sub>3sub>COO-)=c(Na+) D、如果a<sub>1sub>=a<sub>2sub>,且混合溶液的pH<7,则b<sub>1sub>>b<sub>2sub>
A、i=ω<sub>1sub>/ω<sub>2sub> B、i=Z<sub>2sub>/Z<sub>1sub> C、i=n<sub>1sub>/n<sub>2sub> D、i=d<sub>2sub>/d<sub>1sub>
A、C<sub>2sub>H<sub>2sub> B、C<sub>1sub>H<sub>2sub> C、C<sub>2sub>H<sub>1sub> D、C<sub>1sub>H<sub>1sub>