单项选择题
A.EM78P447SA/B B.EM78P451 C.EM78P459 D.EM78P156E
A.EM78P447SA/B B.EM78P451E C.EM78P458 D.EM78P153
A.EM78447 B.HT46R24 C.ET44M210 D.89C52