试设计一种银量法分析方案，测定样品NaCl（含部分Na3PO4）中的Cl-的含量。要求说明选用的滴定剂，反应介质，指示剂以及其他需注意的问题。
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The advantage(s) of effective public speaking is/are:
A. Generating an understanding of your message.
B. Impacting and persuading your audience.
C. Motivating your audience to take a certain action.
D. All of the above.
The correct order of the 4 main parts of presenting is:
A. Introducing, Delivering, Concluding, Preparing.
B. Preparing, Introducing, Delivering, Concluding.
C. Introducing, Preparing, Delivering, Concluding.
D. Preparing, Delivering, Introducing, Concluding.
Which of the following is a function of a thesis statement?
A. It provides a clear ending point for your speech.
B. It helps to organize your introduction.
C. It clarifies your perspective about your topic.
D. It expresses the body points in your speech.
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