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【单选题】
以下哪组单元音在普通话舌面元音舌位图上标注在同一个点,因为它们的舌位高低和前后是一样的,只是唇形不一样。A.
a和o
B.
e和i
C.
i和o
D.
e和o
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举一反三
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A.
Lend his book on the campus.
B.
Buy a new book.
C.
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D.
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A.
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B.
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C.
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D.
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E.
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