关于固定桥连接体的说法哪项是错误的（）

A．是固定桥结构中的应力集中区

B．为增加强度连接体应向龈端延伸至龈缘处

C．分为固定连接体和活动连接体

D．连接体的外形应圆钝

E．增加连接体的龈厚度可增加强度

In relation to the basic legal system of China:

(c) state the relationship between the exclusive jurisdiction and the territorial jurisdiction in dealing with civil or commercial cases. (4 marks)