A.-0.0005%≤比值差≤+0.0005%
B.-0.0001%≤比值差≤+0.0001%
C.-0.01%≤比值差≤+0.01%
D.-0.001%≤比值差≤+0.001%
A.-0.0005%≤比值差≤+0.0005
B.-0.0001%≤比值差≤+0.0001%
C.-0.01%≤比值差≤+0.01%
D.-0.001%≤比值差≤+0.001%
A.当比值<1且相差较大,二者都为负时
B.当比值<1且相差较大,二者都为正时
C.当比值>1且相差较大,二者都为负时
D.当比值>1且相差较大,二者都为正时
E.当比值为负数,且前者为正后者为负时