放射性核素显像的缺点是（）
A.有创性检查
B.辐射损伤大
C.过敏反应
D.不符合生理要求
E.图像分辨率有限
参考答案：E
— How did you find Jennifer Yuh's new film Kung Fu. Panda 2?
— _____.[ ]
A. Oh, wonderful indeed !
B. I went to the cinema alone.
C. First by train and then by ship.
D. A guide showed me the way.
母体的免疫球蛋白能通过胎盘转移给胎儿的是（）
A.IgM
B.IgA
C.IgG
D.IgD
E.IgE
