AB+DF+CD+BC
=AB+BC+CD+ DF
=AF．
故答案为：AF．
—Is that an orange?
—____. It's an apple.[ ]
A. Yes
B. No
C. It is
D. It isn't
能识别高密度脂蛋白受体的载脂蛋白是
A．ApoAⅠB．ApoBC．ApoCⅡD．ApoDE．Apo(a)
