问题 填空题
用方框中所给单词或词组的适当形式填空,每个词限用一次。
               
get, along , twelve, excite, smell
1. We went for a walk __________ the river yesterday evening.
2. The Browns are going to celebrate their daughter's ________ birthday.
3. Watching a football match can make people feel _________ .
4. There's a strange _________ in the house, maybe something burnt.
5. His father always ____________ home at 5:00 pm .
答案

1. along     2. twelfth      3. excited     4. smell    5. gets

单项选择题
实验题

(1)下图中A为淡黄色固体,B、C为溶液,D为气体,E、F为白色沉淀。

①写出B→C的化学方程式

                                 

②写出B→A的化学方程式

                                 

③C→F的离子方程式                                                                                 

④E→D的离子方程式                                                                                    

⑤上图中共发生了8个反应(每根箭头一个反应),其中有    个是氧化还原反应;从上图出现的物质中选出反应物,写出一个置换反应,以验证氯元素原子的氧化性比硫元素原子的氧化性强                                                                                             

(2)把某黑色固体单质A加热至红热,投入到一种无色溶液B中,产生由两种气体组成的混合气体X ,将X做如下图所示的实验:

①由此可以推断:A为                ;C为                   和                       

②写出D加入F生成E和G的离子方程式                                                   

③C通入澄清石灰水时,若气体通过量则白色沉淀又会溶解,写出白色沉淀溶解的化学方程式