阳极距管线的垂直距离不得少于（）。

A.30-65mm²
B.35-70mm²
C.35-75mm²
D.30-75mm²

A.-0.80V~1.4V
B.-0.85~1.35V
C.-0.85~1.3V
D.-0.80V~1.35V

A.50m
B.60m
C.100m
D.150m