X-连锁高IgM血症的诊断依据是
A.CD8阳性T细胞缺乏
B.CD4阳性T细胞减少
C.T细胞CD40L表达缺陷
D.CD45RO表达缺陷
E.CD20阳性B细胞减少
参考答案:C
Some passengers complain that it usually _________so long to fill in travel insurance documents.
A.costs
B.takes
C.spends
D.spares
Paget病的临床表现类似于湿疹。