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问题 推断题

5g固体氧化物X，经过以下两步反应后，得到2g红色固体单质C。

上述第②步恰好反应完全，溶液B只含一种溶质，且是盐。

⑴第①步盐酸是否过量？判断根据是什么？                                       。

⑵X是               （填写化学式）

答案

（1）过量，因为加入铁粉时，有无色气体氢气生成。

（2）CuO

单项选择题

电力系统中无功功率缺乏，将引起电压降低，电压大幅度降低可能进一步使（）。

A、系统频率下降；

B、对频率没什么影响；

C、系统失去稳定而造成振荡；
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填空题



I’d like to talk about (1) in England and Wales, and in England and Wales there are (2) of council. For instance, if I could take the example of Oxfordshire, there is (3) where they are responsible for education, (4) , structure planning, highways, (5) , and so on. And there are (6) district councils, again in Oxfordshire, and they are (7) , in particular council housing, for local plans, for (8) , environment health, and they’re also responsible for (9) , and in Oxford, for instance, they are building an ice-rink (10) of the city.
If we could (11) the question of education, I think this would (12) of local government in the (13) . First of all, there is a minister at (14) level. He is the (15) for Education and he’s responsible for running a (16) education system in the (17) . But (18) there is a lot of local control. So the local councils, (19) such as Oxfordshire County Council, actually run the schools and colleges in their (20) .
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