先天性后鼻孔闭锁最佳的手术方法是()
A.经鼻腔后鼻孔修复术
B.经腭后鼻孔修复术
C.经鼻中隔后鼻孔修复术
D.鼻内镜下后鼻孔修复术
E.经上颌窦后鼻孔修复术
参考答案:D
It was in the hall______ we usually have dinner______ we had a dancing party last night. [ ]
A. where; that
B. that; where
C. where; which
D. which; where
不参与抗体产生的细胞系是()
A.粒细胞系
B.单核吞噬细胞系
C.T细胞系
D.B细胞系
E.红细胞系