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【单选题】
CD40的特点叙述错误的是A.
属肿瘤坏死因子受体超家族
B.
是诱导B细胞再次应答的必需条件
C.
表达泡树突状细胞及活化的单核细胞
D.
与T细胞表面CD40L结合
E.
表达于成熟T细胞
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【单选题】—Are those CDs on the sofa? — [ ]
A.
No, they aren't.
B.
No, it isn't.
C.
Yes, those are.
D.
Yes, it is.
【简答题】What does the cash register look like for those unused to all the different colors and names?
【简答题】What does the cash register look like for those unused to all the different colors and names? It looks a little bit like __________________________ .
【单选题】选择填空。 — Are those your tennis rackets? — No, ______. [ ]
A.
it isn't
B.
they are
C.
those aren't
D.
they aren't
【简答题】当人体的某一部位碰到相线或绝缘性能不好的电气设备外壳时,电流由相线经人体流人大地导致的触电现象称为 。
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