A.是在胸腺中产生的
B.相应抗体是在胸腺中产生的
C.仅存在于T细胞上
D.只有在T细胞辅助下才能产生针对此类抗原的抗体
第1题
听力原文:What differences are there between British English and American English?
What differences are there between British English and American English?
The differences involve grammar, ______, etc.
第2题
What differences are there between British English and American English?
The differences involve grammar, ______, etc.
第3题
第4题
What is the purpose of mentioning the medical history of European royalty?
A.To confirm that inbreeding is not a good thing.
B.To compare gene differences between cats and humans.
C.To explain the definition of inbreeding.
D.To refute the traditional idea about inbreeding.
第5题
第7题
What is the talk mainly about?
A.The guild systems of ancient China and India.
B.The differences between early and modern guilds.
C.The function and organization of early guilds.
D.The method of advancement for guild members,
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