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【多选题】
下列关于人类基因组中重复序列的说法,正确的是?A.
基因外DNA中存在大量的非编码重复序列。
B.
重复序列在基因组中的比例高于单一序列。
C.
重复序列按照在染色体上的分布可以分为串联重复序列和散在重复序列。
D.
有且仅有基因外DNA有重复现象,蛋白质编码序列都是单一拷贝。
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举一反三
【单选题】Why doesn’t Len buy a tie?
A.
a. He doesn’t like them.
B.
b. They are very expensive.
C.
c. He has many ties.
【单选题】Why doesn't Len buy a tie?
A.
He doesn't like the colors of them.
B.
They are very expensive.
C.
He has many ties.
D.
It is difficult for him to choose them.
【单选题】–Why don’t you choose the red tie? --For me, it doesn’t _________ my shirt very well.
A.
fix
B.
accept
C.
compare
D.
match
【单选题】Why doesn't Len buy a tie?
A.
He doesn't like them.
B.
They are very expensive.
C.
He has many ties.
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