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【单选题】
胎儿在宫腔内感染脐带血或新生儿外周血中何种 Ig 水平升高A.
IgM
B.
IgE
C.
IgA
D.
IgD
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举一反三
【单选题】Her ______ is so sweet that we all like to listen to her song. [ ]
A.
name
B.
picture
C.
clothes
D.
voice
【单选题】听力原文： The sound of birds can be divided into 3 types including singing, crying and voice imitating. Singing is normally a continuous multi-syllable melody uttered by the birds under the control of sex...
A.
Singling, echoing and crying.
B.
Singing, echoing and voice imitating.
C.
Echoing, crying and voice imitating.
D.
Singing, crying and voice imitating.
【单选题】Who was Clarence Nash?
A.
A cartoonist.
B.
A writer.
C.
A film maker.
D.
The man who made the voice for Donald Duck.
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