问题 单项选择题

在阳离子H2S分组方案中,下面()都是Ⅲ组离子。

A.Fe2+,Ag+,Ca2+,Mg2+

B.Fe3+,Ag+,Ca2+,Mg2+

C.Fe2+,Fe3+,Cr3+,Ni2+

D.Ca2+,Fe3+,Cr3+,Ni2+

答案

参考答案:C

       在主题为“世界联成一体”的历史活动课上,一个小组的同学向其它同学展示了四幅选自历史教科书上的图片:

       他们提出挑战,请其他组同学派出一个代表,上台回答他们的问题。如果你是你们组的代表,你能完成这场挑战吗?

(1)首先,请写出以上四幅图片内容反映的重大历史事件名称?

     图1:                           图2:                       图3:                      图4:                             

(2)接着,任选二幅图,然后简要说出图中人物在历史上所起的作用。(请注明你选择的人物,再作

    答,多选按前两个评分)

                                                                                                                                                              

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

(3)最后,请说出这些图片反映的历史事件之间的联系。请你按图1与图2;图2与图3;图3与图4的组

    合,任选一组进行简要说明(多选按前一组评分)。

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                              

单项选择题