油品的饱和蒸气压随油品的组成而变化，油品中轻组分含量高则饱和蒸气压（），轻组分含量低，则饱和蒸气压（）。 ["高、高","高、低","低、低","低、高"]
魏国命何人为将攻取中山？
低压电网中的防爆接线盒，应由专人（）进行一次清理检查。 ["每旬","每月","每季度"]
— I'll fly to New York on business next week. —Well,（）. ["have a pleasant journey","you’re so lucky to go abroad","wish you happy","good-bye"]
麦氏点（阑尾点）位置在（）。 ["脐下3厘米","脐至右侧髂前上棘连线中、内1\/3处","脐至右侧髂前上棘连线中点处","脐至右侧髂前上棘连线中、外1\/3处"]
总包的概念是指什么？
