资本成本指公司筹资付出的代价，一般用相对数表示，即资本占用费加上资本筹集费之和除以筹资金额的商。（)

When using visual aids in a speech, you should:()

A.Avoid passing visual aids among the audience

B.Maintain eye contact with listeners when showing visual aids

C.Display visual aids only while discussing them

D.All of the answers are correct

A、You make sure your statistics are from reliable sources.

B、You explain your statistics.

C、You may use visual aids to clarify your statistics.

D、You frighten your audience with statistics.

A、photos and drawings

B、objects and models

C、video

D、powerpoint

A、A presentation use visual aids to show some information to the audience.

B、A presentation involves explaining your ideas.

C、When you explain something, the presenter should not talk about the backstory about the topic.

D、When presenting ideas, the presenter need to use formal and academic language.

A、set up visual aids to the left of the lectern

B、not worry about keeping eye contact with the audience

C、try to pass visual aids among the audience

D、display the visual aid only when discussing it

When you look at a mirror, you can see a/an ______ of your face in the mirror.

A．impact

B．imagination

C．image

D．likeness

A.visual aids

B.none of the above

C.acoustic effects

D.special effects