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【单选题】
肿瘤相关性抗原是指A.
某一肿瘤细胞所特有的抗原
B.
肿瘤细胞不表达的抗原
C.
肿瘤细胞高表达,某些正常细胞也可以少量表达的抗原
D.
正常细胞不表达的抗原
E.
肿瘤细胞与正常细胞都可以高表达的抗原
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反馈参考答案：
举一反三
【简答题】Recently, silly Mr. Smith received an invitation to a fashionable party. He didn’t know the hostess, ______.
【单选题】Recently, silly Mr. Smith received an invitation ____ a fashionable party.
A.
in
B.
for
C.
on
D.
to
【单选题】Recently, silly Mr. Smith received an invitation to a fashionable party. He didn’t know the hostess, ______.
A.
but he still decided to go to the party
B.
and he refused the invitation politely
C.
and he was sad about that
D.
and he thought it was strange
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