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【单选题】
Zhang’s family ____ rather big and his family ____ fond of music.A.
is； are
B.
is； is
C.
are； is
D.
are； are
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举一反三
【单选题】N 2 的分子轨道排布式正确的是 ( )
A.
KK ( s 2s ) 2 ( s 2s *) 2 ( s 2 p ) 2 ( p 2 p ) 4 ;
B.
KK ( s 2s ) 2 ( s 2s *) 2 ( p 2 p ) 4 ( s 2 p ) 2 ;
C.
KK ( s 2s ) 2 ( s 2s *) 2 ( s 2 p ) 2 ( s 2 p *) 2 ( p 2 p ) 4 ;
D.
KK ( s 2s ) 2 ( s 2s *) 2 ( p 2 p ) 4 ( s 2 p *) 2 。
【单选题】N2的分子轨道排布式正确的是()。
A.
KK(σ2s) (σ2s*) (σ2p) (π2p) ;
B.
KK(σ2s) (σ2s*) (π2p) (σ2p) ;
C.
KK(σ2s) (σ2s*) (σ2p) (σ2p*) (π2p) ;
D.
KK(σ2s) (σ2s*) (π2p) (σ2p*) 。
【单选题】Easter is celebrated every spring. Ii is always celebrated on a Sunday. Easter has its【C1】______ in many traditions【C2】______ from many parts of the【C3】______. There are many【C4】______ of Easter. Germ...
A.
celebration
B.
roots
C.
sources
D.
bases
【简答题】英译中Unlike most of the world's volcanoes, they are not always found at the b英译中 Unlike most of the world's volcanoes, they are not always found at the boundaries of the great drifting plates that ma...
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