单项选择题

A.KT1-60S;KT2-70S;KT3-0.5S
B.KT1-0.5S;KT2-60S;KT3-70S
C.KT1-60S;KT2-0.5S;KT3-70S
D.KT1-60S;KT2-65S;KT3-70S