东风8B型内燃机车采用的4Q5型电阻制动短接接触器主触头的额定电压为（）

A.一组常开，一组长闭

B.一组常开

C.一组长闭

D.2组常开

A.100V

B.110V

C.120V

D.130V

A.42～82N

B.44.1～84．2N

C.50．1～88-3N

D.60～90N

A.260V

B.300V

C.315V

D.330V

A.ge;7mln

B.ge;8nlin

C.ge;9n’LITl

D.ge;101Tim

A.740V

B.750V

C.760V

D.770V

A.110V

B.150V

C.220V

D.380V

A.23．8mill

B.25mnl

C.26．2nlin

D.27．6l’nnl

A.7V

B.8V

C.9V

D.10V