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The purpose of the ashing step in graphite-furnace atomic-ab

题目
单选题
The purpose of the ashing step in graphite-furnace atomic-absorption spec-troscopy is to（）
A

Vaporize metal atoms to be analyzed

B

Cause the metal species to form carbides which are more volatile

C

Convert the graphite furnace to ash to avoid carbide formation

D

Burn off organic species that would interfere with the elemental analysis

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相似问题和答案

第1题：

The Buck(降压式变换器) is a ( ) converter.

A.voltage step-up

B.current step-down

C.current step-up

D.resistance


参考答案：C

第2题：

The purpose of the systems analysis phase is to build a logical model of the new system.The first step is（71），where you investigate business processes and document what the new system must do to satisfy users. This step continues the investigation that began during the（72）. You use the fact-finding results to build business models，data and process models，and object models. The deliverable for the systems analysis phase is the（73），which describes management and user requirements，costs and benefits，and outlines alternative development strategies.The purpose of the systems design phase is to create a physical model that will satisfy all documented requirements for the system. During the systems design phase，you need to determine the（74），which programmers will use to transform the logical design into program modules and code. The deliverable for this phase is the（75），which is presented to management and users for review and approval.

A.system charter
B.system scope definition
C.system blueprint
D.system requirements document

答案：B
解析：
翻译：系统分析阶段的目的是建立新系统的逻辑模型，第一步就是进行（71），调查业务流程并记录新系统必须做哪些以满足用户需求。这一步是（72）的延续，可以使用调查结果构建业务模型，数据和流程模型以及对象模型。系统分析阶段的可交付成果是（73），它描述了管理和用户要求，成本和收益，还有可替代的方案。系统设计阶段的目的是创建一个能够满足系统所有需求文件要求的物理模型。 在系统设计阶段，需要确定（74），程序员通过系统过程模型把逻辑设计转换为程序模块和代码。该阶段的可交付成果是（75），提交给管理层和用户审查和批准。（73） A．系统章程B．系统范围定义C．系统蓝图 D．系统需求文件
参考答案：（73）B

第3题：

3 Organisations need to recruit new employees. An important step in the process is the selection interview.

Required:

(a) Explain the purpose of the selection interview. (4 marks)


正确答案：
3 The interview is extensively used for the selection of new employees and in many cases is the only method of selection. However,interviews have been criticised for failing to identify appropriate candidates suitable for the organisation. It is essential therefore that professional accountants recognise both the problems and opportunities that the formal selection interview presents.
(a) The purpose of the selection interview is to find the best possible person for the position who will fit into the organisation. Those conducting the interview must also ensure that the candidate clearly understands the job on offer, career prospects and that all candidates feel that fair treatment has been provided through the selection process.In addition, the interview also gives the opportunity to convey a good impression of the organisation, whether the candidate has been successful or not.

第4题：

What is the primary purpose of SMB Smart Designs？ （）

  • A、 assists in locating appropriate resources
  • B、 provides training on products， tools， and solutions
  • C、 provides a direct support path for any partner issue
  • D、 provides validated commercial solutions
  • E、 provides a step-by-step outline of implementation tasks required

正确答案:B

第5题：

In Hammer’s five-step model, the purpose of “elicitation” is to provide the teacher with feed back as to what to do next.（）

A对

B错


对
略

第6题：

若将STEP 3改为STEP -1时，则SS的输出结果为 ______。

A．22

B．0

C．1

D．-1


正确答案：B
解析：语句For X＝1 T0 10 STEP -1是不正确的，所以本题不执行FOR/ENDFOR循环。最后SS输出初值0。

第7题：

The purpose of the systems analysis phase is to build a logical model of the new system.The first step is（71），where you investigate business processes and document what the new system must do to satisfy users. This step continues the investigation that began during the（72）. You use the fact-finding results to build business models，data and process models，and object models. The deliverable for the systems analysis phase is the（73），which describes management and user requirements，costs and benefits，and outlines alternative development strategies.The purpose of the systems design phase is to create a physical model that will satisfy all documented requirements for the system. During the systems design phase，you need to determine the（74），which programmers will use to transform the logical design into program modules and code. The deliverable for this phase is the（75），which is presented to management and users for review and approval.

A.systems planning phase
B.systems modeling phase
C.systems analysis phase
D.systems design phase

答案：A
解析：
翻译：系统分析阶段的目的是建立新系统的逻辑模型，第一步就是进行（71），调查业务流程并记录新系统必须做哪些以满足用户需求。这一步是（72）的延续，可以使用调查结果构建业务模型，数据和流程模型以及对象模型。系统分析阶段的可交付成果是（73），它描述了管理和用户要求，成本和收益，还有可替代的方案。系统设计阶段的目的是创建一个能够满足系统所有需求文件要求的物理模型。 在系统设计阶段，需要确定（74），程序员通过系统过程模型把逻辑设计转换为程序模块和代码。该阶段的可交付成果是（75），提交给管理层和用户审查和批准。（72） A．系统计划阶段B．系统建模阶段C．系统分析阶段 D．系统设计阶段
参考答案：（72）A

第8题：

Which of the following is implied in the passage?

A．A very important purpose of bank-supervision is to provide adequate capital for their operation.

B．A very important purpose of bank-supervision is to ensure banks to operate with adequate capital.

C．A very important purpose of bank-supervision is to put additional restrictions on the banks' operations.

D．A very important purpose of bank-supervision is to concentrate on risks.


正确答案：B
解析：通读全文，可推知这段文章所隐含的意思是银行监管的目的在于保证资本的充足率。

第9题：

PM七步法，哪几步属于被动阶段？（）

  • A、STEP1-3
  • B、STEP4-5
  • C、STEP6-7
  • D、STEP1-5

正确答案:A

第10题：

One of the main advantages of a graphite-furnace atomizer is that（）

  • A、It requires only very small quantities of a sample
  • B、It requires metal.ions in aqueous solution
  • C、It does not produce background emission like a flame
  • D、It does not get hot like a flame

正确答案:A

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