一．单项选择题1．火花塞选型的基本原则是( )。A．“热型”发动机(大功率、大压缩比、高转速)应选配“冷型”火花塞(裙部长度短、导热长度短);“冷型”发动机(小功率、小压缩比、低转速)应选配“热型”火花塞(裙部长度长、导热长度长)。B．“热型”发动机应选配“热型”火花塞;“冷型”发动机应选配“冷型”火花塞。C．无论“热型”发动机还是“冷型”发动机,都应尽 one. Single choice 1. Spark plug selection of the basic principle is (). A. “Hot” engines (high power, large compression ratio, high speed) should be equipped with “cold” spark plugs (skirt length is short, thermal length is short); “cold” ) Should be equipped with “hot” spark plugs (long skirt length, long thermal conductivity). B. “Hot” engines should be equipped with “hot” spark plugs; “Cold” engines should be fitted with “cold” spark plugs. C. Neither the “hot” engine nor the “cold” engine should do it