根据Ⅰ、Ⅲ导联QRS主波方向估测心电轴，哪项不正确A.Ⅰ导联主波向上，Ⅲ导联主波...

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【单选题】

根据Ⅰ、Ⅲ导联QRS主波方向估测心电轴，哪项不正确

Ⅰ导联主波向上，Ⅲ导联主波向下为电轴左偏

二者主波向上，电轴不偏

二者主波向下，电轴显著右偏

Ⅰ导联主波向下，Ⅲ导联主波向上，电轴右

Ⅰ导联正负波代数和为0，Ⅲ导联主波向上，电轴为+90º

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参考答案：

举一反三

【单选题】We have to cite when we use the following materials EXCEPT_____.

Statistics

Common opinions

Theories and facts

Images, graphs and tables

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【单选题】因 Q P = Δ H , Q V = Δ U ,所以 Q P 与 Q V 都是状态函数。

对

Δ H, Δ U是状态函数，Qp和Qv不是

以上没有状态函数

H，U是状态函数， Q P 与 Q V 不是

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【判断题】因为 Qp = Δ H , Q V = Δ U ,而焓与热力学能是状态函数,所以 Qp 与 QV 也是状态函数。

正确

错误

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【判断题】When we cite data from a study, we need to give out a detailed description of a whole set of data.

正确

错误

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【判断题】When we cite data from a study, we need to give out the source or the location, so that the audience would know where to get more detail for that data.

正确

错误

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【单选题】数据库的设计过程可以分为需求分析、概念设计、逻辑设计、物理设计4个阶段，概念设计阶段得到的结果是______。

数据字典描述的数据需求

E-R图表示的概念模型

某个DBMS所支持的数据模型

包括存储结构和存取方法的物理结构

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【判断题】When we cite data from a study, we need to present the original table or figure together with a textual description.

正确

错误

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【简答题】数据库的设计开发可分为6个步骤, 起点是( )阶段,形成了( )。在( )阶段,将客观事物抽象为( ) 模型。在( )阶段,将概念模型转换成逻辑模型。

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【单选题】When should we cite?

Whenever we present opinions that are not dependent on others’ work.

Whenever we present statements that are not dependent on others’ work.

Whenever an idea or a statement we present is dependent on others’ work.

Whenever an idea or a statement we present is new and unique.

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【多选题】when we cite sources orally, which should be identified?

the book, magazine, newspaper, or Web document you are citing

the author or sponsoing organization of the document

the author's qualifications with regard to the topic

the date on which the document was published, posted, or updated

查看完整题目与答案

Statistics

Common opinions

Theories and facts

Images, graphs and tables

查看完整题目与答案

【单选题】因 Q P = Δ H , Q V = Δ U ,所以 Q P 与 Q V 都是状态函数。

对

Δ H, Δ U是状态函数，Qp和Qv不是

以上没有状态函数

H，U是状态函数， Q P 与 Q V 不是

查看完整题目与答案

【判断题】因为 Qp = Δ H , Q V = Δ U ,而焓与热力学能是状态函数,所以 Qp 与 QV 也是状态函数。

正确

错误

查看完整题目与答案

【判断题】When we cite data from a study, we need to give out a detailed description of a whole set of data.

正确

错误

查看完整题目与答案

【判断题】When we cite data from a study, we need to give out the source or the location, so that the audience would know where to get more detail for that data.

正确

错误

查看完整题目与答案

【单选题】数据库的设计过程可以分为需求分析、概念设计、逻辑设计、物理设计4个阶段，概念设计阶段得到的结果是______。

查看完整题目与答案

【判断题】When we cite data from a study, we need to present the original table or figure together with a textual description.

正确

错误

查看完整题目与答案

【简答题】数据库的设计开发可分为6个步骤, 起点是( )阶段,形成了( )。在( )阶段,将客观事物抽象为( ) 模型。在( )阶段,将概念模型转换成逻辑模型。

查看完整题目与答案

【单选题】When should we cite?

Whenever we present opinions that are not dependent on others’ work.

Whenever we present statements that are not dependent on others’ work.

Whenever an idea or a statement we present is dependent on others’ work.

Whenever an idea or a statement we present is new and unique.

查看完整题目与答案

【多选题】when we cite sources orally, which should be identified?

the book, magazine, newspaper, or Web document you are citing

the author or sponsoing organization of the document

the author's qualifications with regard to the topic

the date on which the document was published, posted, or updated

查看完整题目与答案

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