【单选题】You should hold your business card in bath hands when presenting it. ________
【单选题】Do you think you must make it clear when presenting ideas from another source in your own article?
A.
Yes, because it is a must to give proper credit to one’s sources.
B.
No, because one can use anything at his proposal once it goes public.
【判断题】When presenting, you should show enthusiasm for your topic or creation.