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【简答题】
由Fe 2 O 3 、Fe、CuO、C、Al中的几种物质组成的混合粉末,取样品进行下列实验(部分产物略去): (1)取少量溶液X,加入过量的NaOH溶液,有沉淀生成。取上层清液,通入CO 2 ,无明显变化,说明样品中不含有的物质是(填写化学式) 。 (2)Z为一种或两种气体: ①若Z只为一种气体,试剂a为饱和NaHCO 3 溶液,则反应Ⅰ中能同时生成两种气体的化学方程式是 。 ②若Z为两种气体的混合物,试剂a为适量水,则Z中两种气体的化学式是 。 (3)向Y中通入过量氯气,并不断搅拌,充分反应后,溶液中的阳离子是(填写离子符号) 。 (4)取Y中的溶液,调pH约为7,加入淀粉KI溶液和H 2 O 2 ,溶液呈现蓝色并有红褐色沉淀生成。当消耗2 mol I - 时,共转移3 mol电子,该反应的离子方程式是 。 (5)另取原样品,加入足量稀硫酸充分反应。若溶液中一定不会产生Y中的红色固体,则原样品中所有可能存在的物质组合是(各组合中的物质用化学式表示) 。
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【单选题】Blackburn attributes the success of the company that have involved him to
A.
the role he played in each of them.
B.
the abilities of the new managers.
C.
the decision 'not to make radical personnel changes.
D.
the financial support provided by the owners.
【简答题】简述PLA器件与PAL器件的差别。
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A.
是处红衰翠减，苒苒物华休
B.
对潇潇暮雨洒江天，一番洗清秋
C.
惟有长江水，无语东流
D.
叹年来踪迹，何事苦淹留
【单选题】— John Adams played the lead role really well in the film called Action —______. I don’t think he played his part very well.
A.
Yes, you’re right
B.
That’s a good idea
C.
No, I disagree
D.
That’s true
【单选题】In a very broad sense, legislation plays the same role in France as judicial decisions play in common law countries. Legislative rules provide the starting point from which lawyers and judges work tow...
A.
it provides a just solution to a problem
B.
statutes are laws, and must be obeyed
C.
the judge’s role is always simply to apply automatically the ready-made solutions provided by the legislature
D.
the role of the French judiciary is never really creative
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