A good conclusion of a presentation usually consists of()。

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A good conclusion of a presentation usually consists of()。

A.a brief summary of main points

B.a short conclusion if necessary

C.showing gratitude to the audience for their presence

D.leading up to a question and answer session

参考答案:

答案:a brief summary of main points;a short conclusion if necessary; showing gratitude to the audience for their presence; leading up to a question and answer session