A：2种
B：3种
C：4种
D：5种
阅读下列图片，回答问题。
图1 三国同盟和三国协约 图2第一次世界大战形势图
The Chinese government is developing the west of China，which will ______ the people there，especially those who are still leading a poor life.
互为同分异构体的芳香族化合物有
