A、A.
B.
C.
D.
更多“两个R<sub>1</sub>、R<sub>2</sub>电阻并联，等效电阻值为（）。<p> 两个R<sub>1</sub>、R<sub>2</sub>电阻并联，等效电阻值为（）。</p>”相关的问题
A、（R<sub>1sub>+R<sub>2sub>）/R<sub>1sub>R<sub>2sub> B、R<sub>1sub>R<sub>2sub>/（R<sub>1sub>+R<sub>2sub>） C、R<sub>1sub>+R<sub>2sub> D、R<sub>1sub>R<sub>2sub>
A、R<sub>1sub>＞R<sub>2sub>＞R<sub>3sub> B、R<sub>1sub>＜R<sub>2sub>＜R<sub>3sub> C、R<sub>1sub>＞R<sub>3sub>＞R<sub>2sub> D、R<sub>3sub>＞R<sub>1sub>＞R<sub>2sub>
A、B<sub>Rsub>=2B<sub>rsub> B、B<sub>Rsub>=B<sub>rsub> C、2B<sub>Rsub>=B<sub>rsub> D、B<sub>Rsub>=4B<sub>rsub>
A、R<sub>1sub>与R<sub>3sub>串联后与R<sub>2sub>并联 B、R<sub>1sub>与R<sub>3sub>并联后与R<sub>2sub>串联 C、R<sub>1sub>与R<sub>2sub>并联后与R<sub>3sub>串联 D、R<sub>1sub>与R<sub>2sub>串联后与R<sub>3sub>并联
A、p相对值体现两个证券收益率之间的相关性强弱 B、P<sub>ijsub>=1，r<sub>isub>和r<sub>jsub>完全正相关 C、P<sub>ijsub>=-1，r<sub>isub>和r<sub>jsub>完全负相关 D、p<sub>ijsub>=0，r<sub>isub>和r<sub>jsub>零相关
A、R<sub>1sub>＞R<sub>2sub>＞R<sub>3sub> B、R<sub>1sub>＜R<sub>2sub>＜R<sub>3sub> C、R<sub>1sub>＞R<sub>3sub>＞R<sub>2sub> D、R<sub>2sub>＞R<sub>1sub>＞R<sub>3sub>
A、R<sub>1sub>烧坏，R<sub>2sub>不会烧坏 B、R<sub>1sub>、R<sub>2sub>均烧坏 C、R<sub>1sub>未烧坏，R<sub>2sub>烧坏 D、R<sub>1sub>、R<sub>2sub>均未烧坏
A、顺磁质μ<sub>rsub>>0，抗磁质μ<sub>rsub><0，铁磁质μ<sub>rsub>>>1 B、顺磁质μ<sub>rsub>>1，抗磁质μ<sub>rsub>=1，铁磁质μ<sub>rsub>>>1 C、顺磁质μ<sub>rsub>>1，抗磁质μ<sub>rsub><1，铁磁质μ<sub>rsub>>>1 D、顺磁质μ<sub>rsub><0，抗磁质μ<sub>rsub><1，铁磁质μ<sub>rsub>>0
A、R<sub>Asub>：R<sub>Bsub>=2，T<sub>Asub>：T<sub>Bsub>=2 B、R<sub>Asub>：R<sub>Bsub>=1/2，T<sub>Asub>：T<sub>Bsub>=1 C、R<sub>Asub>：R<sub>Bsub>=1，T<sub>Asub>：T<sub>Bsub>=1/2 D、R<sub>Asub>：R<sub>Bsub>=2，T<sub>Asub>：T<sub>Bsub>=1
A、R<sub>1sub>＞R<sub>0sub> B、R<sub>1sub>＜R<sub>0sub> C、R<sub>1sub>=2R<sub>0sub> D、R<sub>1sub>=R<sub>0sub>
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