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【单选题】
按能量由低到高的顺序排列,正确的一组是A.
1s 、2p、3d、4s
B.
2s 、2p、3s、3p
C.
1s 、2s、3s、2p
D.
4p 、3d、4s、3p
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举一反三
【单选题】Based on Section D, Which benefit of science and technology is NOT mentioned in this section?
A.
It can be helpful to make something magic to come true.
B.
It may be helpful to cure Alzheimer in the future.
C.
It may help us to live longer in the future.
D.
It may help us to be clever in the future.
【简答题】Public Library Example The library re-opened last month The library now has l a seating area with magazines l an expanded section for books on 1 l a new section on local 2 l a community room for meeti...
【简答题】Section B-10 A) People interested in science. B) Youngsters eager to explore. C) Children in their early s. D) Students majoring in science.
【简答题】Section A The idea that science can, and should, be run according to fixed and universal rules, is both unrealistic and pernicious. (81) It is unrealistic, for it takes too a view of the talent...
【单选题】用0.10 mol/LHCl滴定0.10 mol/LNaOH溶液，pH值突跃范围是9.7～4.3。用0.010 mol/LHCl滴定0.010 mol/LNaOH溶液时，pH值突跃范围是：
A.
9.7 ～ 4.3
B.
9.7 ～5 .3
C.
8 .7 ～ 4.3
D.
8.7 ～5 .3
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