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【简答题】
真核生物线性DNA分子末端具有()结构,其能维持染色体的稳定性。
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举一反三
【单选题】In some societies a man has more than one wife and the first one is more important than the others.
A.
Right.
B.
Wrong.
C.
Doesn't say.
【简答题】A．Less than one year. B．More than one year. C．Less than one term. D．More than one term.
【单选题】The best-known example of Sumerian writing is ___________, which is more than a thousand years earlier than Greek epics.
A.
the Epic of Gilgamesh
B.
Homer’s Iliad
C.
The Seven Tablets
D.
Hammurabi Code
【单选题】炉膛负压摆大，瞬间负压到最大，一、二次风压不正常降低，水位瞬时下降，气压、气温下降说明此时发生( )。
A.
烟道面燃烧
B.
吸、送风机入口挡板摆动
C.
锅炉灭火
D.
炉膛掉焦
【单选题】On National Day there are more than five __________ people in the zoo.
A.
thousand
B.
thousands
C.
thousands of
D.
thousand of
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