数据流图用于抽象描述一个软件的逻辑模型,数据流图由一些特定的图符构成。下列图符名标识

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问题:

数据流图用于抽象描述一个软件的逻辑模型,数据流图由一些特定的图符构成。下列图符名标识的图符不属于数据流图合法图符的是 ( )

A.控制流

B.加工

C.数据存储

D.源和潭

考点:计算机等级考试JAVA二级JAVA笔试
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阅读短文,判断正误。对的写“Y”,错的写“N”。

      Hello! I am Zhang Wei. I am a primary school (小学) student. I am in Class Two, Grade Three. There are

200 students and many good teachers in our school. My math teacher is Mr. Liu. He is young and strong. Mrs.

Han is my Chinese teacher. She is not very young. Miss Guo is my English teacher. She is young and pretty. I

love music. My favourite colour is blue. My favourite teacher is Miss Chen, my music teacher. She is funny

and kind. Sometimes she tells (讲) us many stories about music. I study hard.

( ) 1. Zhang Wei is a student.

( ) 2. Zhang Wei only has two teachers.

( ) 3. Mr. Liu is his English teacher.

( ) 4. His math teacher is old but strong.

( ) 5. His music teacher is funny and kind.

( ) 6. He doesn't like studying music.

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如图所示,电源电动势为10V,内电阻为0.5Ω,R1=5.5Ω,R2=4Ω,当S闭合时,一带电油滴恰好静止在水平放置的平行金属板间.求S断开时,油滴的加速度为多大?方向如何?

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联合国环境规划署和世界卫生组织建立了全球水质检测系统,我国于1979年4月也参加了此系统的水质监测,此属于水体污染调查的()

A.基础调查

B.专题调查

C.监测性调查

D.应急性调查

E.随访调查

题型:单项选择题

国内常见的集中教学计划设计程序有哪几个?

题型:单项选择题

“稳”,就是对打击对象一定要调查准确,不要出偏差,做到事实准、定性准、量刑准,既不重罪轻判,也不轻罪重判,真正做到不枉不纵,不错不漏。 ( )

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