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【单选题】
儿童患肠道寄生虫病时血液和肠粘液中哪种Ig可显著升高A.
IgG
B.
IgA
C.
IgM
D.
IgD
E.
IgE
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【单选题】Don’t worry too much about ____ mistakes. They are ____ natural part of learning.
A.
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B.
the, a
C.
the, /
D.
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