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搜题
【单选题】
快速以太网是由（）标准定义的A.
IEEE802.1Q
B.
IEEE802.3u
C.
IEEE802.4
D.
IEEE802.3i
E.
IEEE802.1d
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反馈参考答案：
举一反三
【简答题】[A] personal [B] private [C] own [D] public
【简答题】[A] fellow [B] individual [C] personal [D] private
【多选题】The description of the secondary structure of DNA double helix are correct, EXCEPT
A.
Two antiparallel strands
B.
Deoxyribose-phosphate frame located outside the strands
C.
Two strands are joined by hydrogen bond formed between A-T and G-C
D.
Diameter of helix is 2 nm, and 10 bases in each turn
E.
Nucleosome is the structure un
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