A.a=1,b=1/6
B.a=-1,b=1/6
C.a=-1,b=-1/6
D.a=1,b=-1/6
[单选题]A.a=1,b=1/6B.a=-1,b=1/6C.a=-1,b=-1/6D.a=1,b=-1/6
[单选题]A.药物注射剂量过大B.患者未空腹C.药物中游离锝增多D.患者注射药物后进食E.图像采集时间不足
[单选题]A.a=1,b=1/6B.a=-1,b=1/6C.a=-1,b=-1/6D.a=1,b=-1/6
[单选题]A.-zB.zC.-yD.y
[单选题]A.-zB.zC.-yD.y
[单选题]A.-zB.zC.-yD.y