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【单选题】
Definition of E u k aryotic cellA.
It is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle.
B.
It is the smallest and simplest self-replicating prokaryote.
C.
It is an irregularly shaped region within the cell of a prokaryote that contains all or most of the genetic material .
D.
C ells have a cell nucleus and other organelles enclosed within membranes .
E.
It is folded invaginations in the plasma membrane of bacteria .
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举一反三
【单选题】下面哪个不是几何三大问题的意义?
A.
是人类历史上的第一个纯数学问题
B.
标志着几何学已成为一个有着比较严密的理论系统和科学方法的学科
C.
产生了新的数学理论——圆锥曲线理论
D.
说明几何直观有时体现出的是一些比较复杂问题的本质，几何直观思维能力对于培养创造性思维能力具有一定的作用
【单选题】Over the years, pregnant women have asked Donald Redelmeier, at Torontos Sunnybrook Hospital , about the dangers of diving, hot tubs, flying, mountaineering, cycling, bear attacks and all sorts of oth...
A.
And
B.
So
C.
But
D.
Hence
【单选题】The teacher is writing ____ a piece of chalk on the blackboard while the students are writing ____ink in exercise books.
A.
with, in
B.
in, with
C.
in, in
D.
with, with
【简答题】文学接受在现实生活中具体是怎么得以实现与完成的?
【简答题】While writing exams for courses other than English, you may tend to ______.
【简答题】按内容可将计算机检索系统的数据库类型分为: ____ 数据库、 ____数据库、____数据库和____数据库。
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