双绞线的特性抗阻为（）欧姆。基带同轴电缆的特性抗阻为50欧姆

A. That’ sit?请说慢点。
B. Anything eese?您还办理其它业务吗?
C. Would you minds peaking moreslowly,please?请您说慢点好吗?
D. Please speak slowly.就这些吗?