问题 填空题

由单质A与化合物B两种粉末组成的混合物, 在一定条件下可按下图所示发生转化:

请回答:

(1)A的化学式                  ;B的俗称            ;J的化学式                

(2)反应③的离子方程式                                                               

(3)反应②的离子方程式                                                            

(4)沉淀H变沉淀I的化学方程式                                                       

(5)如何检验溶液F中的阳离子                                           

答案

(每空2分)

(1)Al ;铁红;Al(OH)3

(2)Fe + 2Fe3+ ==3Fe2+

(3)2Al+2OH-+2H2O==2AlO2-+3H2

(4)4Fe(OH)2 + O2 + 2H2O==4Fe(OH)3

(5)先加KSCN溶液再加Cl2水(其它合理答案也可)

阅读理解

The young people who talk of the village as being “dead” are talking nothing but nonsense, as in their hearts they must surely know.

No, the village is not dead. There is more life in it now than there ever was. But it seems that “village life” is dead. Gone for ever. It began to decline about a hundred years ago. When many girls left home to go into service in town many miles away, and men also left home in increasing numbers in search of work, and home was where work was. There are still a number of people alive today who can remember what “village life” meant in the early years of the present century. It meant knowing and being known by everybody else in the village. It meant finding your entertainment in the village of within walking distance of it. It meant housewives tied to the home all day and every day. It meant going to bed early to save lamp oil and coal.

Then came the First World War and the Second World War. After each war, new ideas, new attitudes, new trades and occupations were revealed(展现)to villagers. The long-established order of society was no longer taken for granted. Electricity and the motorcar were steadily operating to make “village life” and “town life” almost alike. Now with the highly developed science and technology and high-level social welfare(福利)for all, there is no point whatever in talking any longer about “village life.” It is just life, and a better life.

Finally, if we have any doubts about the future, or about the many changes which we have seen in our lives, we have only to look in at the school playground any mid-morning; or see the children as they walk homeward in little groups. 0bviously these children are better fed, better clothed, better educated, healthier, prettier and happier than any generation of children that ever before walked the village street.

1.By saying that village is not dead, but “village life” is dead, the writer suggests that_______ .

A.those young people who talk of the village as being “dead” are wrong

B.the two statements are against each other

C.“village life” today is rather uninteresting

D.“village life” today is no longer like what it used to be

2.As is suggested in paragraph 2, villages in the past______________.

A.lived a simpler life than villagers today 

B.knew fewer people than villagers today

C.found it difficult to enjoy themselves

D.like to wash themselves with cold water

3.The expression “…there is no point whatever in talking about…” in paragraph 3 means that______________.

A.there is no end to the talking about …  

B.it is harmful to talk about …

C.it is not meaningless to talk about …

D.there is no reason for talking about …

4.What does the writer think of the “village life today”?

A.Dead.       B.Worse       C.Better.      D.Unclear.

单项选择题