【判断题】A news item in The Los Angeles Times begins with the following paragraph:"In the latest Trump administration effort to spotlight crimes committed by immigrants in the country illegally, the head of Ho...
【单选题】听力原文:Saddam and seven co-accused are on trial for crimes against humanity for the killing of 148 Shiites following an attempt on Saddam's life in the town of Dujail in 1982. Which of the following is ...
A.
Saddam killed 148 Shiites as a reaction when an attempt of murdering him failed.
B.
Saddam is on a trial where 7 witnesses are present.
C.
Saddam took revenge after 7 people conspired to murder him in 1982.
D.
Saddam is the only person charged with crimes against humanity for the massive killing.
【简答题】(10分)已知A、B、C、D、E都是周期表中前四周期的元素,它们的核 电荷数A 2为非极性分子。B、C氢化物的沸点比它们同 族相邻周期元素氢化物的沸点高。E的原子序数为24。 请根据以上情况,回答下列问题:(答题时,A、B、C、D、E用所对应的元素符号表示) (1)A、B、C的第一电离能由小到大的顺序为 。 (2)B的氢化物的中心原子采取 杂化。 (3)写出化 合物AC 2 的电子式 ;一种由B、...
【单选题】在国际结算中,对出口商最为有利的结算方式是( )。
【单选题】肼屈嗪和下列哪种药物合用既可增加降压效果又可减轻心悸的不良反应: