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【单选题】
曼陀罗全株有毒,其中以()毒性最强
A.
花朵
B.
叶子
C.
根须
D.
种子
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A.
because
B.
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C.
ever since
D.
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A.
was until; when
B.
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C.
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D.
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A.
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A.
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A.
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A.
as
B.
since
C.
until
D.
before
【判断题】酒精阳性乳的热稳定性很差。
A.
正确
B.
错误
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