胸腺内发育中的"St阳性"胸腺细胞是指()
A.CD3+CD2+
B.CD2+TCR
C.TC+Raβ+TCRγδ+
D.CD4+CD8+
E.CD4+TCRαβ+
参考答案:D
---Where___?
—I got caught in the heavy traffic, or I ___ here earlier.
A.did you go; had arrived
B.are you; was
C.were you; would come
D.have you been ; would have been
已提足折旧的固定资产,不再计提折旧;未提足折旧提前报废的固定资产必须补提折旧,直至提足折旧为止。( )