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【单选题】
下列哪种细胞的作用受 MHC I类分子限制:A.
B 细胞对非己抗原的特异性识别
B.
Th 细胞对非己抗原的特异性识别
C.
Tc （ CTL ）细胞对靶细胞的特异性识别和杀伤
D.
巨噬细胞对靶细胞的吞噬与杀伤
E.
DC 细胞提呈外源性抗原
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举一反三
【简答题】Mary is ambitious. She is keen to get ahead in her career. (翻译)
【单选题】She was at the______ of her career when she was badly injured in the car accident.
A.
bloom
B.
peak
C.
excess
D.
extreme
【简答题】She's hoping the course will improve her career ________. A) prospects B) perspectives C) expectations D) hopes
【单选题】After graduation she reached a point in her career _____ she needed to decide what to do. [ ]
A.
that
B.
what
C.
which
D.
where
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