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【单选题】
能够与通用转录因子结合的是A.
上游启动子元件
B.
TATA box
C.
增强子
D.
反应元件
E.
Pribnow box
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反馈参考答案：
举一反三
【单选题】The real detective lives in 'an unpleasant moral twilight' because______.
A.
he is an expensive public servant
B.
he must always behave with absolute legality
C.
he is obliged to break the law in order to preserve it
D.
he feels himself to be cut off from the rest of the world
【单选题】The students were given complimentary passes for the new movie.
A.
inexpensive
B.
free
C.
expensive
D.
good
【单选题】When I came in, they were ____________ in their discussion
A.
to absorb
B.
absorbing
C.
absorbed
D.
being absorbed
【简答题】(语法填空)When I came in, they were ________ breakfast.
【单选题】They ________ the maths problem when I came in.
A.
worked on
B.
were working on
C.
were working
D.
were working for
【单选题】______ of money prevented us from taking a holiday this year.
A.
Limitation
B.
Freedom
C.
Expense
D.
Lack
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