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问题 选择题

如图是部分短周期元素的单质及其化合物的转化关系图(有关反应的条件及生成的H2O已略去)．

已知：

(a)A、B、C、D是非金属单质，其中B、C、D在常温常压下是气体．

(b)反应①、②是化工生产中的重要反应．

(c)化合物E是形成酸雨的污染物之一，化合物K是常用的氮肥．

(d)化合物L具有漂白性，可由Cl2与NaOH溶液反应而制得．

(e)化合物J由两种元素组成，其相对分子质量为32.

请按要求填空：

(1)反应③的化学方程式_____________________．

(2)C的结构式__________________________；

H为正盐，则H的化学式为____________________．

(3)L的溶液与化合物E反应的离子方程式： ______________.

(4)化合物J的化学式____________________．

答案

(1)2NH3＋H2SO4===(NH4)2SO4（2分）

(2)N≡N（2分）  　(NH4)2SO3（2分）

(3)ClO－＋SO2＋2OH－===Cl－＋SO＋H2O（2分） 

(4)N2H4（2分）

选择题

我国云南傣族的竹楼，反映了当地的环境特点是[ ]

A、多风沙

B、干旱

C、湿热

D、寒冷
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阅读理解
任务型读写。
     阅读下面短文,根据所读内容在表格中的空白处填入恰当的单词,
每个空格只填一个单词.
     Many students eat their breakfasts on the way to school or in the dinning-room.  But some of them
don't really know how to eat well when eating out.  
      Here is some important advice.  The first is to eat less fast food.  The most obvious harm of eating
too much fast food is weight gaining because of too much fat.  Young people and adults are at risk of
disease related to weight.  Too much fast food can drag your body down.  French fries, for example,
were recently found to contain much more acrylamide(丙烯酰胺) than other food.  This may cause
cancer.  Actually, deep fried food all contains acrylamide.  So don't eat it too often.  
     Soda is another thing you should watch out for.  Cokes and other sodas contain a lot of sugar and
can slow down a person's calcium absorption, so it's best to drink as little soda as possible.  
     Food in the dinning-room may not be as tasty as fast food, but it's actually easier to make healthy
choices.  Human bodies need variety.  You can have a dinner that balances lean proteins, vitamins and
complex carbohydrates(碳水化合物).  In other words, a meal with fish or meat, vegetables and some
bread or rice will provide you with most nutrients that the body needs.  
     Some snacks, on the other hand, will help keep you going until your next big meal.  It is natural for
teenagers, especially boys, to feel hungry during school time.  Don't forget to take some foods, like
whole-grain biscuits or low-fat milk in your school bag.  
                                              Title: Advice on 1.  ____________
AdviceFood2.  ___________3.  _____________Kind
KindFrench fries and other 4.  ______
fried food

Too much 5.  _______acrylamide

Cause weight gainingLead to  6.  _____________

Unhealthy food

Drink less 7.  ______

SodasLots of sugarSlow down
8.  ______absorption

Unhealthy food

Eat in
dinning-room

Fish or meat,
vegetables and some bread or rice

Lean proteins,
vitamins and
complex carbohydrates

Provide most
nutrients that the
body needs

9.  _____ food

Eat10.  ____Whole-grain biscuits or low-fat milk

Not mentionedKeep you going until next big meal

Healthy food
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