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【单选题】
不同对基因相互作用,出现了新的性状,这种基因作用称为A.
互补效应
B.
上位效应
C.
抑制效应
D.
合并效应
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反馈参考答案：
举一反三
【单选题】Those Americans who participate in public discussions about the church-state issues believe that
A.
these issues have nothing to do with America's fate
B.
these issues have close relationship with America's destiny
C.
these issues have indirect relationship with America's future
D.
these issues have immediate relationship with America's present
【单选题】Those Americans who participate in public discussions about the church -state issues beileve that _____
A.
these issues have nothing to do with America's fate
B.
these issues have close relationship with America's destiny
C.
these issues have indirect relatiosnhip with America's future.
D.
these issues have immediate relatiosnhip with America's Present.
【简答题】饺子用小麦粉（flour for dumpling）
【单选题】下列各组分子或离子中,不属于共轭酸碱关系的是( )
A.
HCl-Cl -
B.
H 2 CO 3 -CO 3 2-
C.
H 2 CO 3 -HCO 3 -
D.
NH 4 + -NH 3
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