胎儿从母体获得IgG属于（）
A.过继免疫
B.人工被动免疫
C.人工自动免疫
D.自然自动免疫
E.自然被动免疫
参考答案：E
Nothing but two ancient Chinese coins ＿＿＿＿ after they took out the jar.
A．did they find in it
B．they found in it
C．in it did they find
D．in it found they
膝关节脱位早期严重并发症是（）
A.侧副韧带损伤
B.十字韧带损伤
C.半月板损伤
D.腘窝血管神经损伤
E.胫骨棘骨折
