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【判断题】
( )NH4-和NO3-都是植物易吸收的氮素养分,因此两种形态氮进入植物后都能直接参与同化。A.
正确
B.
错误
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【单选题】Of the many opinion expressed to the council members by the various citizens’ groups present, __________ was the only opinion that mattered.
A.
their
B.
their one
C.
theirs
D.
they
【单选题】Of the many opinions expressed to the council members by the various citizens group present, ______was the only opinion that mattered.
A.
their
B.
their one
C.
theirs
D.
they
【简答题】发时，上齿和下唇接触，形成阻碍，随后发音。
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