问题 选择题

以下哪个性质不是所有铵盐的通性[ ]

A.都易溶于水          

B.都可分解放出氨气

C.都能与碱反应且均放出氨气   

D.都是离子化合物

答案

答案:B

材料分析题

阅读和观察下面的材料及漫画,结合教材知识回答问题:

(1)材料和漫画分别说明了什么?共同告诉我们一个什么道理?

                                                                                                                                                               

                                                                                                                                                               

                                                                                                                                                               

                                                                                                                                                                

(2)作为中学生,我们应如何文明上网?

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                             

(3)针对青少年沉溺网络的问题,请你给社会、学校、家庭和经营者提出几点建议。

                                                                                                                                                            

                                                                                                                                                             

                                                                                                                                                            

                                                                                                                                                            

单项选择题