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【单选题】
关于外显子和内含子的叙述，正确的是A.
仅外显子在 DNA 模板上有相应的互补序列
B.
hnRNA 上只有外显子而无内含子序列
C.
除去内含子及连接外显子的过程称为剪接
D.
除去外显子的过程称为剪接
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【简答题】You lost your book when you were studying in the lecture room. Write a lost notice to 1) inform. others about the details, and 2) express your hope of finding it back. You should write about 100 words...
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【单选题】Goldilocks _____ when she picked flowers in the forest. [ ]
A.
is lost
B.
was lost
C.
is losing
D.
lose
【简答题】A．When the ecological balance of the river is lost. B．When people consume more fish than they used to. C．When large numbers of algae, fish and birds are killed. D．When the production of marine petrole...
【简答题】A．When the ecological balance of the river is lost. B．When people consume more fish than they used to. C．When large numbers of algae, fish and birds are killed. D．When the production of marine petrole...
【单选题】When ______________ he ______________ his bike? [ ]
A.
did, lose
B.
did, lost
C.
does, lost
【简答题】When does the lost property office open?
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