The control volume is（ ）
A: A system of a certain mass
B: Space body with changed position and shape
C: Fixed space body
D: Space body with constant shape and moving position
A: A system of a certain mass
B: Space body with changed position and shape
C: Fixed space body
D: Space body with constant shape and moving position
举一反三
- A control volume is: （ ） A: An isolated system B: A closed system but heat and work can cross the boundary C: A specific amount of mass in space D: A fixed region in space where mass, heat and work can cross the boundary of that region
- （ ） refers to body distance and body touch。 A: Body language B: Time language C: Paralanguage D: Space language
- The brain perceives the body's orientation in space by（
- In broad terms, ____ covers time language, space language, body language and paralanguge.
- Which are included in nonverbal communication? A: Time Language B: Space Language C: Body Language D: Paralanguage