选择题：A keynote speech （）。

题目内容：

A keynote speech （）。

A.is usually given in parallel session

B.should capture the central theme of the conference

C.is usually given by well-known experts in a particular field

D.is usually one of the highlights of a conference

参考答案：【答案仅供学习，请勿对照自行用药等】

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