A.0.7V B.0.5V C.0.1V D.0.3V
A. B. C. D.
A.時(shí)間連續(xù) B.數(shù)值連續(xù) C.時(shí)間和數(shù)值都連續(xù) D.時(shí)間和數(shù)值都不連續(xù)