未分类

73201When writing an abstract, you need to cut out all unnecessary information and get straight to the point.

73202Reading the instructions for authors and tailoring your abstracts to the specific requirements can increase the likelihood of having your paper accepted for presentation or publication.

73203When writing an abstract, the weight accorded to different components should be the same.

73204Which of the following statements about “Product” in an abstract are correct?

73205Which of the following statements about “Conclusion” in an abstract are correct?

73206When revising your abstract, you should （）。

73207According to linguist Ken Hyland, an abstract of a research paper usually include （）。

73208The two most important functions of an abstract are （）。

73209In the Introduction part of an abstract, you can （）。

73210When writing the rough draft of your abstract, you should （）。

73211（）is sometimes called “objectives”, “research questions”, or “problem statement”.

73212In an abstract, the main procedures or the materials and equipment used to create the final result of the research belong to （）。

73213In an abstract, （）provides readers with enough background information about your research.

73214Which of the following statement about abstract is NOT correct?

73215If you have enclosed any documents along with your business letter, you can indicate this by typing “Enclosure” below the signature.

73216While writing an invitation letter, to help the invitee have a better understanding of the event, you can provide a brief account of the relevant details, such as the conference theme and arrangement.

73217While writing an invitation letter, to ensure the receiver is going to attend, you can introduce the background of yourself or the organization you represent in great detail.

73218In a business letter, inside address usually begins one line below the date and is always on the left margin no matter which format you are using.

73219Casual words and slang as well as the light, conversational tone should be avoided in a business letter.

73220When writing an application letter, you should make sure it is targeted for the specific program or position.

73221It’s important to repeat information in your CV in your application letter.

73222The content of an invitation letter usually includes （）。

73223Two major purposes of an invitation letter are（）。

73224Complimentary close （）。

73225In a business letter, which dates are correct?

73226When writing business letters, we should （）。

73227Which of the following information should be included in a cover letter?

73228To show you are a qualified candidate for an academic program, you can （）in your application letter.

73229When writing business letters, being concise means （）。

73230When you have to decline an invitation, you （）。

73231Which of the following is NOT a business letter?

73232“Ms” is used for （）。

73233In a business letter, “CA” is an example of a （）。

73234In a business letter, “Dear Mr. Johnson” is an example of a （）。

73235In a business letter, “Yours sincerely,” is an example of a （）。

73236In a business letter, （）refers to the full address and zip code of the sender.

73237The purpose of a letter is included in the （）。

73238The recipient’s name and address in business letters are called the （）。

73239In （）, every line of the letter begins at the left margin, with a space of one line between paragraphs.

73240Which is NOT correct about business letter?

73241“My own work combines research, primarily in contemporary British drama, with the dramaturgical development of new plays.” is an example of introducing （）。

73242In an application letter, “I am writing to you about the possibility of pursuing a doctor’s degree in Finance in your prestigious University.” is an example of （）。

73243“Congress” is only used in political settings and refers to the group of people elected to make laws in the US.

73244At a round table meeting, the emphasis is on individual presentation instead of group discussion.

73245Only full papers are required for attendance at an academic conference.

73246Some conference notices may contain facts about transportation or hotel accommodation for the convenience of the conference participants.

73247Plenary session is attended by all the participants of a conference.

73248A Call for Papers and a conference notice are two totally different documents and they have nothing in common.

73249Information about paper submission and presentation should only be included in a Call for Papers.

73250Sponsor of a conference is the institution that initiates the conference while organizer of the conference is entrusted by the sponsor to organize the conference.

73251For any conference, the organizing committee should only issue one conference notice.

73252Poster session is not important in　academic conference because there aren’t many interactions between the author of a paper and the viewers.

73253Though the format of conference notices may vary, but （）are usually included.

73254Which of the following are formal meeting?

73255We can acquire conference information from（）。

73256A keynote speech （）。

73257A seminar is （）。

73258Academic committee is also called （）。

73259Which of the following is NOT true concerning “convention”?

73260Which of the following is NOT the duty of academic committee?

73261Conference venue refers to （）。

73262Which of the following is NOT true concerning “parallel session”?

73263Which of the following is NOT true concerning “workshop”?

73264传输线终端匹配时，具有无限宽的工作频带。

73265宽带高频功放中的放大器可以工作在丙类。

73266无损传输线模型中，传输线上的串联电阻和传输线间的并联电导均为零。

73267以下关于传输线变压器的描述中正确的有（）

73268以下场景中，可能需要使用分布参数进行分析的有（）

73269以下关于宽带高频功率放大器的描述中正确的是（）

73270以下关于传输线的描述中正确的是（）

73271自给偏压电路所产生的偏置电压由电路自身的特性决定，故与输入电压大小无关。

73272小信号谐振放大电路、丙类功放电路中，对匹配网络滤波度的要求都非常高以得到良好的输出信号。

73273设丙类功率放大电路工作于临界状态：当增大其负载电阻时，集电极电流和输出电压波形顶部均将呈现下凹。

73274丙类功率放大电路工作于欠压、过压还是临界状态只与负载电阻大小和静态工作点有关系。

73275可以使用丙类功放来放大音频信号。

73276设丙类高频功率放大器工作在过压状态下，则当负载电阻增大时，以下描述中正确的是（）

73277对于谐振功率放大电路，下列表达正确的是（）

73278在丙类功率放大器中，若放大器工作在临界状态，如增加基极的直流偏置电压，则放大器将工作在（）状态。

73279在丙类功率放大器中，若放大器工作在临界状态，如增加集电极偏置电压，放大器将工作在（）状态

73280放大器的甲、乙、甲乙、丙四类工作状态中，半导角最小的是（）

73281放大器的甲、乙、甲乙、丙四类工作状态中，负载相同条件下电压放大倍数最小的是（）

73282放大器的甲、乙、甲乙、丙四类工作状态中，效率最高的是（）

73283放大器的甲、乙、甲乙、丙四类工作状态中，失真最小的是（）

73284设计一个丙类功率放大电路，既要考虑输出足够大的功率，同时也要考虑有较高的效率，此时放大电路的工作状态应选择在（）

73285以下关于丙类功放中阻抗变换的说法中正确的是（）

73286甲类、乙类、丙类电路的区分依据是放大器件在输入信号的一个周期内是否会进入（）以及进入该区域的时长

73287在丙类高频功率放大器中，工作状态随输入信号幅度的增加，将会（）

73288丙类高频功率放大电路的负载谐振阻抗R由大变小（假定其它条件不变），则放大电路工作状态变化趋势为（）

73289小信号谐振放大电路的选择性越强，对带外信号的抑制能力也越强。

73290由于小信号谐振放大电路中放大器的输入信号一般都比较小，因此放大器工作在甲类状态，可以采用微变等效电路法来分析。

73291双参差调谐电路与调谐在同一频率的两级谐振放大电路相比具有相同的通频带宽度（假设各单级谐振放大电路的Q值相同）。

73292可以通过增大电容值来提高简单并联谐振回路的矩形系数。

73293可以认为声表面波滤波器是利用声波和电能转换时存在的滤波效应而获得高性能的。

73294所有的无源滤波器都或多或少存在插损。

73295三参差调谐电路的矩形系数优于双参差调谐电路，但调整起来更加复杂。

73296把多个具有相同特性的单级单谐振回路级联起来，其矩形系数将级数的增加不断增大，直至最后变成1。

73297关于小信号谐振放大电路，下列表达正确的是（）

73298谐振放大器中的器件或负载电阻与谐振回路连接时，采用部分接入方式，其目的是（）

73299以下关于小信号谐振放大电路的描述中正确的有（）

73300若简单并联LC谐振回路的谐振频率为50MHz，Q值为50，则其3dB带宽的上截止频率约为（）。

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