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【单选题】
CD4＋Th细胞能识别的抗原是A.
游离的可溶性抗原
B.
TI-Ag
C.
经 APC提呈的抗原
D.
经 APC提呈的抗原肽-MHCⅠ类分子复合体
E.
经 APC提呈的抗原肽-MHCⅡ类分子复合体
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举一反三
【单选题】听力原文： [31]Mr. Foster started his publishing business with only one magazine. It was called 'World News'. Mostly it had summaries of important week events from around the world. But it always included ...
A.
He was good at writing about interesting people.
B.
It was much easier to -mite stories about people.
C.
He believed that people are always eager to learn about other people.
D.
He thought people played an important role in world events.
【单选题】I want to know the reason ___ you didn't do your homework.
A.
why
B.
what
C.
that
D.
which
【简答题】It’s a tower in Pisa, Italy . It was built in 1173. Today it’s still there. ( ) 2 . It is one of the most famous buildings in the world. It is considered to be one of the most recognizable image...
【单选题】It was two years ago ______ his sister became a doctor.
A.
that
B.
where
C.
who
D.
what
【单选题】I want to know the way ( )he treated you yesterday.
A.
in that
B.
what
C.
which
D.
that
【单选题】I want to know the owner of the house and ask for information about it. [ ]
A.
previous
B.
later
C.
late
D.
front
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