【单选题】2喷油器工作间隙漏泄的极少量柴油经()流回柴油箱。
【单选题】下列选项中,哪个不是正弦量的三要素( )。
【单选题】治疗肿胀的手法在操作时一定要保持与( )
【单选题】Scientists photographed for the first time ever _____ wild gorillas used a stick to test the depth of a pool before getting into it, according to a recent study.