题目

Do you know the lady ______ is interviewing our teacher. -- Yes, she is a reporter from CCTV.A．whichB．whoC．whomD．whose 答案：B解析:略已知铁原子的相对原子质量是56，核电荷数是26，则铁原子的核内质子数是______，核外电子数是______，核内中子数是______．