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【多选题】
术后深静脉血栓形成的主要原因是A.
静脉血流缓慢
B.
下床活动太早
C.
静脉壁损伤
D.
术后肢体使用弹力绷带
E.
血液状态
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【简答题】英译中 The trend was naturally most obvious in those areas of science based especially on a mathematical or laboratory training, and can be illustrated in terms of the development of geology in the Unite...
【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】Easter day is celebrated on the first Sunday after the ______, on or after March 21st.
【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...
【单选题】下列有关表达正确的是( )
A.
硫离子的电子排布式：1s 2 2s 2 2p 6 3s 2 3p 4
B.
N原子最外层电子的轨道表示式：
C.
CO 2 分子的结构式: O='C=O'
D.
2-甲基-1-丙醇的结构简式：
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