Since his works earned him quite a reputation in Liverpool, he has stayed there most of his life, ____ the occasional visit to his hometown.

A．apart from

B．but for

C．regardless of

D．instead of

为改变我国的能源结构，在今后几个五年规划中国家将加大核能的开发于利用．与常规能源相比核能具有的优点是______．核变化的形式有核聚变和______．