执行返回指令，退出中断服务程序，这时返回地址来自( )。
A．ROM区
B．程序计数器
C．堆栈区
D．CPU的暂存寄存器
参考答案：C
When we reached the stadium in a rush, the newly-elected major ____ his speech and the performance _______.
A．have finished ; began
B．had just finished; was about to begin
C．had just finished; had begun
D．just finished; began
在认识论中坚持反映论的原则，只是辩证唯物主义的观点。( )
