【单选题】站姿礼仪操作标准要求站立时 头正、颈直、( )、臂垂、挺胸、收腹。
【简答题】She did her best to _____________ her critics.
【判断题】东汉末年宦官的势力是被士大夫所掌控的舆论力量最终击败。()
【单选题】在柴油机中,润滑的作用有()。Ⅰ.防震Ⅱ.调整间隙Ⅲ.减磨Ⅳ.冷却
【单选题】What is the best choice for the following blank? She did her best to appear ________.
【单选题】She did her best______ her ability.