M 2+ 离子 3d 轨道上有 4 个电子,表示其原子最外层电子运动状态的四个量子数是 ,该原子 M 的核外电子排布是 。
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举一反三
【单选题】A 26-year-old woman in her first trimester of pregnancy (week 9) is experiencing severe nausea and vomiting that is interfering with her ability to maintain an acceptable level of nutrition. Which one...
A.
Methylprednisolone 12 mg orally twice daily as needed
B.
Droperidol 0.625 mg orally every 12 hours as needed
C.
Doxylamine 10 mg/pyridoxine 10mg, two tablets at bedtime
【单选题】Questions 9 and 10 are linked. 9. Many chronic alcoholics develop thiamin deficiency because of a poor diet and an inability to absorb thiamin from the intestine in the presence of ethanol. Which one ...