selectiveadj.选择的；选择性的；精挑细选的selective agent选择剂selective error选择性错误selective relay选择性继电器,选择继电器selective index选择索引selective gears选速齿轮箱selective lever选速杆selective crude选择的原油,特定原油selective class选择性类selective check选择检验,选择校验selective value选择值