A.15%、2% B.–15%、1% C.±15%、1% D.15%、1%
A.0.95 B.0.98 C.0.99 D.0.999
A.0.02HZ-0.2HZ B.0.2HZ-2HZ C.2HZ-20HZ D.0.2HZ-20HZ