It's advisble for the speaker to hold something in his/her hand to reduce nervousness even when the object is irrelevant to the speech.

单项选择题中国古代哲学家张载提出，“凡可状皆有也，凡有皆气象也，凡象皆气也”。这是（ ）。

单项选择题By Deliver them, do not just say them, we mean speakers should slow down at the technical terms, and say them clearly. so that the audience are not confused by these rough-looking words.