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【简答题】
大军挺进中原的伟大意义是什么?
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【简答题】真核生物RNA聚合酶Ⅱ催化______合成，RNA聚合酶Ⅲ的转录产物是______和______。
【单选题】The wet volcanic ash that covered a Maya village in Central America in about AD 595 coated and pre- served everyday objects beans, chilies, rope, gourds, even unwashed dishes -- just as they had been ...
A.
Ceren at that time enjoyed a high civilization
B.
people in Ceren were more intelligent than people today
C.
Ceren' s disappearance was a tragedy
D.
the power of nature was great
【简答题】完形填空。 The morning in London was wet, wet, wet. I had to check out from the 1 before noon, and then I would have a few 2 before my conference started near Richmond Park in the 3 . I started early for a...
【单选题】某静态RAM 芯片容量为8K×8位，如用它组成32K×8位的存储器，所用芯片数及这种芯片的片内地址线数目是( )。
A.
4片、13根
B.
4片、12根
C.
6片、11根
D.
4片、16根
【简答题】真核生物中已发现三种RNA pol，其中______催化的转录产物是tRNA。
【简答题】某RAM芯片的容量为8 K×8位，试用该RAM芯片和双2线一4线译码器74139构成一个容量为32 K×8位的存储器系统。
【单选题】The wet volcanic ash that covered a Maya village in Central America in about AD 595 coated and preserved everyday objects beans, chilies, rope, gourds, even unwashed dishes—just as they had been left,...
A.
Ceren at that time enjoyed a high civilization
B.
People in Ceren were more intelligent than people today
C.
Ceren's disappearance was a tragedy
D.
the power of nature was great
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