【简答题】Make comments upon the relationship between arbitrariness, convention, and motivation.
【单选题】关于滴耳剂的使用方法叙述不正确的是
B.
滴耳剂滴入后要保持耳朵侧面朝上5~10秒,并一直抓住耳垂
【单选题】The comments we make while we are watching a film or a show are called___. ( )
B.
bullet screen comments
【单选题】根据口器的着生位置和方向,昆虫的头式可分为 三类。