【简答题】【消耗次数：1】
什么是原子公式？
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相关题目
【简答题】
什么是命题公式？
【简答题】
什么是变异系数？变异系数的应用条件是什么？请写出标准差异系数的计算公式
【单选题】
事务的原子性是指( )。
①
事务中包括的所有操作要么都做，要么都不做
②
事务一旦提交，对数据库的改变是永久的
③
一个事务内部的操作及使用的数据对并发的其他事务是隔离的
④
事务必须是使数据库从一个一致性状态变到另一个一致性状态
【单选题】
“还有什么比原子中云深不知处’的电子云更具朦胧美？还有什么比生命之源叶绿素中的“绿色秘密”更具神秘美？还有什么比‘生命之梯’DNA回旋曲折的双螺旋更具活力美？还有什么比纳米’世界中用原子砌成的纤巧结构更具精致美？”（一摘自《科学是美丽的》）对这个语段中所运用的修辞手法判断正确的一项是（）。
①
反问，排比
②
设问，排比
③
对偶，对比
④
比喻，对比
随机题目
【单选题】
26. Which of the following is INCORRECT?
①
Another two girls
②
Few words
③
This work
④
A bit of flowers
【单选题】
2.Should any critical issue _______ the negotiation with foreign company, immediately report to the manager for advice.
①
arise from
②
interact
③
ensure
④
. make
【单选题】
3.It is impossible for a man like him to bear the ______ of being suspected as a thief.
①
fame
②
stigma
③
reputation
④
mark
【单选题】
7.Children learn how to______ with others by playing with their friends.
①
interact
②
talk
③
involve
④
. absorb
【单选题】
27.The city council is planning a huge road-building programme to ease congestion. The underlined part means _____.
①
calm
②
relieve
③
comfort
④
still
【单选题】
10.Mother advised him that Tom is not a good guy to ______.
①
associate with
②
care about
③
touch
④
be concerned with
【单选题】
18.He told me he saw it , but _____fact he wasn’t really there.
①
in point of
②
at point of
③
about point of
④
from point of
【单选题】
21.Sex education in primary school is still a big _____ in China today.
①
question
②
issue
③
problem
④
event
【单选题】
24.All the President’s Men _____ one of the important books for scholars who study the Watergate Scandal.
①
remains
②
remained
③
remain
④
is remaining
【单选题】
22.Plant your fig-tree _________ there is plenty of sunshine.
①
that
②
where
③
which
④
how